Added 3 tables in Entity framework
I added 3 tables to my EF: 2 tables for data and the third for connection between them (= 3 columns in this table, first ID as
the primary key, and the second and the third are FK to the other two tables).
But the problem is that the third table was added with just the first column (= ID).
Why is that?
Hello shirley111,
>>But the problem is that the third table was added with just the first column (= ID).
Could you please tell which approach you are using, code first, model first or database first? And how do you define these three tables? Please also share them with us. Currently, we cannot understand what exactly happens on your side.
Here are some information about many to many relationship in Entity Framework which might be helpful(from your description, it seems that you are trying to make a * to * relationship):
Configure Many-to-Many relationship using Code First Approach
Entity Relationships
Regards.
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I can't save the record in a new/empy table of sqlserver in the entity Framework 5.0
Hi guys ,
I have tried to become a database expert in Entity Framework but I can't. because I am not able to save the record in a fresh/ empty table of sql server 2008 r2 database. for that I have watched the video tutorials step by steps that how to save the record.
I followed the tutorials step by step and at the end the result is negative.
I tried a simple way given below. please some one help me that where and what I missing the.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using EmployeesLib;
namespace EmpApplication
public partial class Form1 : Form
private EMPEntities _dbContext;
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private void employeeBindingNavigatorSaveItem_Click(object sender, EventArgs e)
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APP.CONFIG connection string
<add name="EMPEntities" connectionString="metadata=res://*/EmpModal.csdl|res://*/EmpModal.ssdl|res://*/EmpModal.msl;provider=System.Data.SqlClient;provider connection string="data source=(local);initial catalog=Inventory;integrated
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it is just for confirmation that either the problem is in OS or VS.
I doubt that any of it has anything to do with the issue. If you think it does, then you can post to the forums.
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=vssetup
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/home?category=sqlserver
I think you are riding a bad horse (that tutorial) you are using, and you need to change horses. I think the 'modified' state is not being rasied on the entity bound to the grid when it has changed, and EF is not going save any entity that's not in a modified
state. -
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SELECT
CASE WHEN (( NOT (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL))) AND ( NOT (("Project2"."C2" = 1) AND ("Project2"."C2" IS NOT NULL)))) THEN '0X' WHEN (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL)) THEN '0X0X' ELSE '0X1X' END AS "C1",
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"Extent1"."NAME" AS "NAME",
"Extent1"."TYPE_CODE" AS "TYPE_CODE",
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"Extent1"."MODIFY_DATE" AS "MODIFY_DATE",
CASE WHEN (( NOT (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL))) AND ( NOT (("Project2"."C2" = 1) AND ("Project2"."C2" IS NOT NULL)))) THEN NULL WHEN (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL)) THEN "Project1"."QUARTER_NAME" END AS "C5"
FROM "DBO_SPACE_DEV"."S_PERIOD" "Extent1"
LEFT OUTER JOIN (SELECT
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1 AS "C2"
FROM "DBO_SPACE_DEV"."S_SEASON_QUARTER" "Extent2" ) "Project1" ON ( CAST( "Extent1"."PERIOD_ID" AS number(10,0))) = "Project1"."C1"
LEFT OUTER JOIN (SELECT
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Edited by: 997830 on Apr 3, 2013 8:40 AMAn update:
I tried again following this example to the letter:
Using NuGet to Install and Configure Oracle Data Provider for .NET
This time I used a console application as described in the example. Yes, I rebuilt the project after the NuGet install.
I made the appropriate mods to App.config. I get the same error message as with the MVC example above.
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Entity Framework - Execute Stored Procedures With Table Valued Patameter
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Following is my code -
DataTable dataTable=new DataTable();
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dbContext.Database.ExecuteSqlCommand("exec stored_proc @tvp",
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dbContext.Database.ExecuteSqlCommand("exec stored_proc @tvp", param);
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Please remember to the following page on MSDN for more information:
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I'm having problem with using the Entity Framework version 6/5. Whenever, I create the new solution and try to use the Entity Framework, Visual Studio crashes and restarts itself. Scenarios are:
1) Add Entity Framework by Add New Item-> Entity Framework-> go through wizard and finish...Crash.
2) Add by Nuget console-> Install-Package Entityframework...Crash.
3) Reload the solution from either #1 or #2, run Nuget console->Uninstall-Package Entityframework...Crash
4) new solution, nuget package manager, select Entity Framework->Install...Crash.
No matter what I do, and how I try to install entity framework, it keeps crashing on both VS 2010 and VS 2013. It's frustrating when I'm trying to learn the technology. Below are the Application error log I see in the Event Viewer:
Log Name: Application
Source: .NET Runtime
Date: 4/29/2015 9:51:25 AM
Event ID: 1025
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: DETROIT189L.HMMNA.COM
Description:
Application: devenv.exe
Framework Version: v4.0.30319
Description: The application requested process termination through System.Environment.FailFast(string message).
Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack:
at System.Environment.FailFast(System.String)
at System.Management.Automation.WindowsErrorReporting.FailFast(System.Exception)
at System.Management.Automation.CommandProcessorBase.CheckForSevereException(System.Exception)
at System.Management.Automation.ExceptionHandlingOps.ConvertToMethodInvocationException(System.Exception, System.Type, System.String, Int32, System.Reflection.MemberInfo)
at DynamicClass.CallSite.Target(System.Runtime.CompilerServices.Closure, System.Runtime.CompilerServices.CallSite, System.Object, System.Object, System.Object, Boolean, Int32, System.Object, System.Object, System.Object, System.Object)
at System.Dynamic.UpdateDelegates.UpdateAndExecute9[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Runtime.CompilerServices.CallSite, System.__Canon, System.__Canon, System.__Canon,
Boolean, Int32, System.__Canon, System.__Canon, System.__Canon, System.__Canon)
at System.Management.Automation.Interpreter.DynamicInstruction`10[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
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at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.PSScriptCmdlet.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.PSScriptCmdlet.DoEndProcessing()
at System.Management.Automation.CommandProcessorBase.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
System.Management.Automation.Language.FunctionContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
System.Management.Automation.Language.FunctionContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.Runspaces.LocalPipeline.InvokeHelper()
at System.Management.Automation.Runspaces.LocalPipeline.InvokeThreadProc()
at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart()
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name=".NET Runtime" />
<EventID Qualifiers="0">1025</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2015-04-29T13:51:25.000000000Z" />
<EventRecordID>29379</EventRecordID>
<Channel>Application</Channel>
<Computer>DETROIT189L.HMMNA.COM</Computer>
<Security />
</System>
<EventData>
<Data>Application: devenv.exe
Framework Version: v4.0.30319
Description: The application requested process termination through System.Environment.FailFast(string message).
Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack:
at System.Environment.FailFast(System.String)
at System.Management.Automation.WindowsErrorReporting.FailFast(System.Exception)
at System.Management.Automation.CommandProcessorBase.CheckForSevereException(System.Exception)
at System.Management.Automation.ExceptionHandlingOps.ConvertToMethodInvocationException(System.Exception, System.Type, System.String, Int32, System.Reflection.MemberInfo)
at DynamicClass.CallSite.Target(System.Runtime.CompilerServices.Closure, System.Runtime.CompilerServices.CallSite, System.Object, System.Object, System.Object, Boolean, Int32, System.Object, System.Object, System.Object, System.Object)
at System.Dynamic.UpdateDelegates.UpdateAndExecute9[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.Runtime.CompilerServices.CallSite, System.__Canon, System.__Canon, System.__Canon,
Boolean, Int32, System.__Canon, System.__Canon, System.__Canon, System.__Canon)
at System.Management.Automation.Interpreter.DynamicInstruction`10[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
System.Management.Automation.Language.FunctionContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.PSScriptCmdlet.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.PSScriptCmdlet.DoEndProcessing()
at System.Management.Automation.CommandProcessorBase.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
System.Management.Automation.Language.FunctionContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.PipelineOps.InvokePipeline(System.Object, Boolean, System.Management.Automation.CommandParameterInternal[][], System.Management.Automation.Language.CommandBaseAst[], System.Management.Automation.CommandRedirection[][],
System.Management.Automation.Language.FunctionContext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon,
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.Interpreter.Run(System.Management.Automation.Interpreter.InterpretedFrame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](System.__Canon)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(System.Action`1<System.Management.Automation.Language.FunctionContext>, System.Object, System.Object)
at System.Management.Automation.DlrScriptCommandProcessor.Complete()
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(System.Management.Automation.CommandProcessorBase)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(System.Object, System.Collections.Hashtable, Boolean)
at System.Management.Automation.Runspaces.LocalPipeline.InvokeHelper()
at System.Management.Automation.Runspaces.LocalPipeline.InvokeThreadProc()
at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart()
</Data>
</EventData>
</Event>Hi Hiroaki Morikawa,
>>Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Based on the error message, I doubt that it is the memory performance issue, like this case:
http://social.msdn.microsoft.com/Forums/en-US/71f134bd-d665-43b5-8c67-52c4d6ed4ed9/kinect-driver-problem?forum=kinectsdknuiapi.
Please restart the system, stop all unnecessary third party processes, and make sure that your task manager is free, then test again.
Do you install the VS2010 and VS2013 in the same machine? If so, please also make sure that your machine has the enough configurations. To make sure that it is not the add-in issue, please also run your VS in safe mode, or run your VS as the admin, test
it again.
Best Regards,
Jack
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Entity Framework doesn't save new record into database
Hy,
I have problem with saving new record into database using Entity Framework.
When I run program, everything seems normal, without errors . Program shows existing, manually added records into the database, and new one too. But new one isn't save into database after running program.
I've got no idea where's problem. There is code for add new record, show existing.
Thanks for help!!
// add new record
using (var db=new DatabaseEntitiesContext())
var person = new Table()
First_Name = "New_FName",
Second_Name = "New_SName",
PIN = "4569"
db.Tables.Add(person);
db.SaveChanges();
//show all records
using (var db=new DatabaseEntitiesContext())
var selected = from x in db.Tables
select x;
foreach (var table in selected)
Console.WriteLine("{0}{1}{2}",table.First_Name,table.Second_Name,table.PIN);Hi BownieCross;
If you are using a local database file in your project the following may be the cause.
From Microsoft Documentation:
Issue:
"Every time I test my application and modify data, my changes are gone the next time I run my application."
Explanation:
The value of the Copy
to Output Directory property is Copy
if newer or Copy
always. The database in your output folder (the database that’s being modified when you test your application) is overwritten every
time that you build your project. For more information, see How
to: Manage Local Data Files in Your Project.
Fernando (MCSD)
If a post answers your question, please click "Mark As Answer" on that post and "Mark as Helpful".
NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects
and unknown namespaces. -
Entity framework-calling stored Proc to return one param returns ORA-6550
Hi There,
I am new to the VS2010/MVC3 game with ODP.net, so no abuse please .......
I have successfully inserted a record into a table via the controller/entity framework, but only by currently hard coding the id. The next logical step is to attempt to obtain the id from the Oracle DB via a stored procedure. Here is the body of the PL/SQL procedure on the Oracle side:-
create or replace package body dotnetcommon as
PROCEDURE getnextpoid ( p_to_id OUT NUMBER ) IS
BEGIN
SELECT pord_seq.nextval INTO p_to_id FROM dual;
END getnextpoid;
end dotnetcommon;
show error
I have then added this procedure to my Entity Framework Model within VS2010 , and from within the Model Browser, I now have a stored procedure of "DOTNETCOMMON_GETNEXTPOID" under my Model.Store. This has an out type parameter named p_to_id, which is a type of number.
I then added a function import, so I have a function by the name of "GETNEXTPOID" under the Function Imports folder, with a collection property of 'None'.
This function has a parameter P_TO_ID with a type of "Decimal".
From within my controller, I have the following code:-
[HttpPost]
public string Create(PURCHASEORDER po)
TasEntities tmprep = new TasEntities();
ObjectParameter poid = new ObjectParameter("poId", typeof(Int16));
var result = tmprep.GETNEXTPOID(poid);
return "Next PO Id is " + result;
Thus, on pressing the Save from my view, i am hoping to return the next logical sequence number into the poid objectparameter. However, I am presented with the following error:-
Inner Exception of:-
{"ORA-06550: line 1, column 8:\nPLS-00306: wrong number or types of arguments in call to 'GETNEXTPOID'\nORA-06550: line 1, column 8:\nPL/SQL: Statement ignored"}
It falls over , taking me to the Model.Designer.cs at :-
public int GETNEXTPOID(ObjectParameter p_TO_ID)
return base.ExecuteFunction("GETNEXTPOID", p_TO_ID);
I am assuming it is to do with the decimal/int/number conversion, but I do not have the nouse to fix it ? Does anybody know what is wrong with what I have attempted to do above ?
Please please get back to me if you need any more information, I am wanting to move on but cannot.
I have seen posts regarding setting the sequence in a before insert trigger on the table, but this is not ideal. Can the above not work instead ?
Many thanks in advance for any help you can provide.
Graeme
Edited by: user4487499 on 05-Apr-2011 08:18I have now raised this in the odp.net forum, as on looking at other posts it seems to be the best place for it.
Cheers,
Graeme
Edited by: user4487499 on 05-Apr-2011 08:18
Edited by: user4487499 on 05-Apr-2011 13:00 -
Help with Oracle Entity Framework and synonyms
Hi.
I have some troubles using schemas and synonyms of tables. It means that we are working with diferent schemas, one of those is the owner of tables and other one use synonyms with permissions to access, modify and delete in these tables, this one is the schema that the application use. So whats the way to use this synonyms to tables using the application schema with Entity Framework?
While I'm using the application data schema I couldn't get data from tables, because the application schema doesn't have tables just use synonyms to them.
Thanks in advanced
Cesar.I have the same problem. I have created a data connection in the VS2010 server explorer to my oracle database. In the filter I have added the schemas that my user id has access to and the tables are shown in the server explorer. However, when I go through the ADO.NET entity wizard, the tables are not shown.
-
Entity Framework 6 and Odata v4
I have built a simple WebAPI 2.2 project, using Entity Framework 6 and OData v4. I have a SQL server database that exists and would like to build an OData service for read-only reporting purposes. the database is a simple
two table database in test that represents a possible development effort. The primary key on the Primary table is the configid (auto increment). The Primary key on the secondary table is the combination of the configid (link to primary), and the date descending.
There is typically one update of the data per day and I need the most recent first.
Running the project I can do all that you would expect. I can query the configs "/odata/configs". I can query a single entity "/odata/configs(1)", and I can query the detail "odata/configs(1)/detail". When I do this I get all
x-thousand records for the last several years... most recent first... Great! My final effort in this project is to page the data at the client... I test the uri by using the following: "odata/configs(1)/detail?top=10". This results in 10 elements,
however it is actually the bottom of the table data... not the sort order of the key in the sql table... can someone explain how I would go about fixing this particular issue?
The goal is to use this service to produce a client that would visualize data changes over time. Paging would need to occur as you would typically expect. The client expects typical uri syntax, i.e. top, skip... in order to page the data. however the sort
order is throwing the paging... Is there documentation on how to alter Entity Framework and Odata 4 queries to produce custom results? I am in the early stages of discovery on these technologies, but I anticipate more customization...
I recall reading somewhere that Entity Framework requires a unique id on every table... is this true, and would that solve the problem? Altering the database in test would be easy enough... in practice however, not so much! Options?
Primary Table:
configid: int [primary key]
name: string
Secondary Table:
configid: int (link to primary)
date: datetime
data: varchar(200)
I created a new Web API 2.2 project and added the Entity Frameworks 6.1.2 and Odata 4.x.Hello Stewart,
According to your description, it seems that your issue is more related the Odata RestAPI, I suggest you could post it to the WebAPI forum:
http://forums.asp.net/1246.aspx/1?Web+API
And for paging querying in WebAPI, there is a blog I think which might be helpful:
http://blogs.msdn.com/b/youssefm/archive/2013/02/19/paging-with-asp-net-web-api-odata.aspx
Regards.
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Guys i am using Entity Framework 5 code first (I am not using edmx) with Oracle and all works good, Now i am trying to get data from stored procedure which is under package but stored procedure have out param which is user define type, Now my question is
how i will call stored procedure from entity framework
Thanks in advance.I agree with you, but issue is we have lots of existing store procedure, which we need to call where damn required. I am sure those will be few but still i need to find out.
If you think you are going to get existing MS Stored Procedures or Oracle Packages that had nothing to do with the ORM previously to work that are not geared to do simple CRUD operations with the ORM and the database tables, you have a rude awakening
coming that's for sure. You had better look into using ADO.NET and Oracle Command objects and call those Oracle Packages by those means and use a datareader.
You could use the EF backdoor, call Oracle Command object and use the Packages, if that's even possible, just like you can use MS SQL Server Stored Procedures or in-line T-SQL via the EF backdoor.
That's about your best shot.
http://blogs.msdn.com/b/alexj/archive/2009/11/07/tip-41-how-to-execute-t-sql-directly-against-the-database.aspx -
Multiple database users, ORM, entity framework, best practices
Hello everyone!
You've already helped me several times, however I must ask for an advice once more.
I was assigned to develop .NET application with Data Access Layer and I've decided to use Oracle Database Software to provide sample data.
As I'm absolute novice considering creating DAL I'd be grateful if you can examine my plan in terms of security and reliability:
My database:
1) I've created database with sample tables and relations between them. All tables belongs to databaseAdmin.
2) I've created HR and Manager database users and granted them some privileges on certain databaseAdmin's tables. My intention is to reduce access to unnecessary tables. If my application user want to make some changes to Customers table it should be enough to connect to database as HR.
And now I'd like to map my database using Entity Framework in my application. And that's where I have a problem:
-If I create Entity Model basing on databaseAdmin tables I get perfect model, however every Entity SQL query would be executed on behalf of databaseAdmin, which breaks my idea of hiding unnecessary tables.
-If I create Entity Model for HR and Manager users, my models could overlap on tables that both users have access to and no connection between tables would be generated (as from their point of view those tables are just some tables that belong to databaseAdmin)
Could you help me with this deadlock? Or maybe my assumptions about multiple database users are incorrect? Please, bear in mind I'm a novice.
I was trying to find a solution in web, and there're tons of data discussing technical aspects of Entity Framework etc., but not so many documents about conceptual model of database.hi Michael,
Thanks for you posting!
Sorry for I am not totally understanding your issue. Maybe two points need your confirm:
1. I confuse with the "Service controller"? IS your meaning MVC controller? Or ServiceController(http://www.codeproject.com/Articles/31688/Using-the-ServiceController-in-C-to-stop-and-start
2.whether The type of ID in the model is match to the database ? In other words, Is the type of IDin .edmx matched to the database?
By the way, it seems that this issue is more related to EF. You could post this issue on EF discussion for better support.
Thanks & Regards,
Will
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Entity framework TPT does not work - showstopper
Greetings,
I'm experiencing a similar problem that is described here:
[Entity Framework and inheritance - Possible bug in EF?|http://stackoverflow.com/questions/11506683/entity-framework-and-inheritance-possible-bug-in-ef.]
I'm using:
Windows 7 64 bit
ODAC 11.2 Release 5 32 bit
Oracle Express 11.2 on localhost
Visual Studio 2012
Entity framework 5.0
.net 4.5
Create a simple database with TPT inheritance:
CREATE TABLE Person(
Id NUMBER(38, 0) NOT NULL,
Name VARCHAR2(50),
CONSTRAINT PK100 PRIMARY KEY (Id)
CREATE TABLE Employee(
Id NUMBER(38, 0) NOT NULL,
JobTitle VARCHAR2(50),
CONSTRAINT PK101 PRIMARY KEY (Id)
ALTER TABLE Employee ADD CONSTRAINT ref_Employee_person
FOREIGN KEY (Id)
REFERENCES Person(Id)
CREATE TABLE Superhero(
Id NUMBER(38, 0) NOT NULL,
Superpower VARCHAR2(50),
CONSTRAINT PK102 PRIMARY KEY (Id)
ALTER TABLE Superhero ADD CONSTRAINT ref_Superhero_person
FOREIGN KEY (Id)
REFERENCES Person(Id)
-- Sequence
CREATE SEQUENCE seq_id
INCREMENT BY 1
START WITH 55
MINVALUE 1
MAXVALUE 9999999999999999999999999999
NOCYCLE
NOORDER
CACHE 20
CREATE OR REPLACE TRIGGER PERSON_BI BEFORE INSERT ON PERSON FOR EACH ROW
BEGIN IF :NEW.ID IS NULL THEN SELECT SEQ_ID.NEXTVAL INTO :NEW.ID FROM DUAL; END IF; END;
Create a console application, add an edmx file, set up inheritance like so:
Diagram
And I set the Id property in Person entity as StoreGeneratedPattern to Identity
Then I created the following program:
static void Main(string[] args)
//Employee
var db = new Entities();
EMPLOYEE e = new EMPLOYEE() { ID = 0, JOBTITLE = "Programmer"};
e.NAME = "John Regular Doe";
db.People.Add(e);
//Superhero
SUPERHERO s = new SUPERHERO();
s.NAME = "Superman";
s.SUPERPOWER = "Flight";
db.People.Add(s);
db.SaveChanges();
//Fetch all persons and look at the type
//this is where I get an error:
var allPeople = db.People.ToList();
allPeople.ForEach(x => Console.WriteLine("type: " + x.GetType()));
This throws the following error when I fetch into allPeople:
All objects in the EntitySet 'Entities.People' must have unique primary keys. However, an instance of type 'TestingTPTInheritance.EMPLOYEE' and an instance of type 'TestingTPTInheritance.SUPERHERO' both have the same primary key value, 'EntitySet=People;ID=38'.
Looking at the database everything looks fine
-- Person table --
ID NAME
39 John Regular Doe
40 Superman
-- Employee table --
ID JOBTITLE
39 Programmer
-- Superhero table --
ID SUPERPOWER
40 Flight
If I take the select that EF generates in " db.People.ToList();" and run it I get the following result:
C1 C2 NAME C3 C4
0X0X 40 Superman
0X0X 39 John Regular Doe Programmer
Is this a bug in ODAC. If so is there a workaround or will there be a fix soon?
Edited by: Amplus on 7.11.2012 07:59Thank you for the reply shsu
I was being careless when I copied the error message and sequence, sorry about that. I did run this serveral times after I copied the error message. I recreate the seqence starting with 1 and recreated the problem. The error message is:
All objects in the EntitySet 'Entities.People' must have unique primary keys. However, an instance of type 'TestingTPTInheritance.EMPLOYEE' and an instance of type 'TestingTPTInheritance.SUPERHERO' both have the same primary key value, 'EntitySet=People;ID=2'.
The data in the tables is:
Person:
ID NAME
1 John Regular Doe
2 Superman
employee
ID JOBTITLE
1 Programmer
Superhero
ID SUPERPOWER
2 Flight
And the generated select is:
SELECT
CASE WHEN (( NOT (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL))) AND ( NOT (("Project2"."C2" = 1) AND ("Project2"."C2" IS NOT NULL)))) THEN '0X' WHEN (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL)) THEN '0X0X' ELSE '0X1X' END AS "C1",
CAST( "Extent1"."ID" AS number(19,0)) AS "C2",
"Extent1"."NAME" AS "NAME",
CASE WHEN (( NOT (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL))) AND ( NOT (("Project2"."C2" = 1) AND ("Project2"."C2" IS NOT NULL)))) THEN NULL WHEN (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL)) THEN "Project1"."JOBTITLE" END AS "C3",
CASE WHEN (( NOT (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL))) AND ( NOT (("Project2"."C2" = 1) AND ("Project2"."C2" IS NOT NULL)))) THEN NULL WHEN (("Project1"."C2" = 1) AND ("Project1"."C2" IS NOT NULL)) THEN NULL ELSE "Project2"."SUPERPOWER" END AS "C4"
FROM "TPT"."PERSON" "Extent1"
LEFT OUTER JOIN (SELECT
"Extent2"."JOBTITLE" AS "JOBTITLE",
CAST( "Extent2"."ID" AS number(19,0)) AS "C1",
1 AS "C2"
FROM "TPT"."EMPLOYEE" "Extent2" ) "Project1" ON ( CAST( "Extent1"."ID" AS number(19,0))) = "Project1"."C1"
LEFT OUTER JOIN (SELECT
"Extent3"."SUPERPOWER" AS "SUPERPOWER",
CAST( "Extent3"."ID" AS number(19,0)) AS "C1",
1 AS "C2"
FROM "TPT"."SUPERHERO" "Extent3" ) "Project2" ON ( CAST( "Extent1"."ID" AS number(19,0))) = "Project2"."C1"
With the following result:
C1 C2 NAME C3 C4
0X0X 2 Superman null null --> should't there be a "Flight" entry here??
0X0X 1 John Regular Doe Programmer null
I also tried this:
var result1 = db.People.OfType<SUPERHERO>().ToList(); //Count=1
var result2 = db.People.OfType<EMPLOYEE>().ToList(); //Count=1
var result3 = db.People.OfType<PERSON>().ToList(); //Throws the following error:
All objects in the EntitySet 'Entities.People' must have unique primary keys. However, an instance of type 'TestingTPTInheritance.EMPLOYEE' and an instance of type 'TestingTPTInheritance.SUPERHERO' both have the same primary key value, 'EntitySet=People;ID=2'.
The only thing I can think of is that my little console app is picking up the oracle client from oracle express instead of the ODAC driver. Is there an easy way to force it to use the correct driver? I have this in my config file but I'm not sure if it works:
<oracle.dataaccess.client>
<settings>
<add name="DllPath" value="C:\oracle\product\11.2.0\client_3\bin" />
</settings>
</oracle.dataaccess.client>
And I have also referenced Oracle.Data.Access here:
C:\oracle\product\11.2.0\client_3\odp.net\bin\4\Oracle.DataAccess.dll
client_3 directory is my ODAC Release 5 installation. I changed the config settings to:
<oracle.dataaccess.client>
<settings>
<add name="DllPath" value="C:\oracle\product\11.2.0\client_3\odp.net\bin\4\Oracle.DataAccess.dll" />
</settings>
</oracle.dataaccess.client>
then the program was able to run this line:
var allPeople = db.People.ToList();
But both objects were of type EMPLOYEE. Then I ran this:
var result1 = db.People.OfType<SUPERHERO>().ToList();
and get the following error:
All objects in the EntitySet 'Entities.People' must have unique primary keys. However, an instance of type 'TestingTPTInheritance.EMPLOYEE' and an instance of type 'TestingTPTInheritance.SUPERHERO' both have the same primary key value, 'EntitySet=People;ID=2'.
The problem must be that I do have multiple versions of Oracle client installed on my computer and it is picking up the wrong one either when I'm generating the edmx file or when the application is connecting to the db. I think my next step will be to uninstall all oracle client instances as well as oracle express and try again from scratch!! -
Custom mapping is obviously not reflected in the Entity Framework designer
Hi,
I use the Oracle Data Provider for .NET 11.2.0.2.50 Beta 3 with the Entity Framework. I added a custom mapping to the app.config that maps NUMBER(1,0) to bool:
<oracle.dataaccess.client>
<settings>
<add name="bool" value="edmmapping number(1,0)" />
</settings>
</oracle.dataaccess.client>
When I create an Entity Framework model from my Oracle database the EF designer uses Int16 for NUMBER(1,0) fields instead of bool. If I run the program I then get an exception (as expected):
"Schema specified is not valid. Errors:
EntityFrameworkTest.msl(7,12) : error 2019: Member Mapping specified is not valid. The type 'Edm.Int16[Nullable=True,DefaultValue=]' of member 'ISVIPCUSTOMER' in type 'EntityFrameworkTestModel.CUSTOMER' is not compatible with 'OracleEFProvider.number[Nullable=True,DefaultValue=,Precision=1,Scale=0]' of member 'ISVIPCUSTOMER' in type 'EntityFrameworkTestModel.Store.CUSTOMERS'."
Okay. Assuming it's an error in the EF designer, I set the type Boolean in the model myself for the NUMBER(1,0) fields. But that gives me a compilation error:
"Error 2019: Member Mapping specified is not valid. The type 'Edm.Boolean[Nullable=True,DefaultValue=]' of member 'ISVIPCUSTOMER' in type 'EntityFrameworkTestModel.CUSTOMER' is not compatible with 'OracleEFProvider.number[Nullable=True,DefaultValue=,Precision=1,Scale=0]' of member 'ISVIPCUSTOMER' in type 'EntityFrameworkTestModel.Store.CUSTOMERS'."
Is this a bug in the provider? Or am I missing something?Are you using model first or database first? If you're using database first, make sure you update the model from the database after adding that configuration.
Also, if your model is in a different assembly (ie a different project) from your executable, your executable project's configuration file also needs the mapping section.
Finally... there's been a LOT of threads about this not working properly in beta 3. I'm still on beta 2 and except for some incorrect error messages in the designer it works fine (I get fake errors). If nothing else works, I might suggest trying beta 2 as a last resort. -
Problem Entity framework and short types
I am using the Entity Framework in Visual Studio to access a table in my oracle database. Problem is when selecting a record in runtime the following error shows up:
Value was either too large or too small for an Int16
This error originates when trying to access a table-field declared as number(5). The framework translates this in a short field. The max value for short is 32767, but the value in the table is 36001.
Can I solve this?
thanks.Yes, you need to change the mapping for that type to an int32. To do that you can add this to your configuration file:
<oracle.dataaccess.client>
<settings>
<add name="int16" value="edmmapping number(4,0)" />
<add name="int32" value="edmmapping number(9,0)" />
</settings>
</oracle.dataaccess.client>
You should then update the model to get the new changes. Note that I've found that I have to change the types manually in the model, but after I do that once it works fine. Documentation is here: http://docs.oracle.com/cd/E11882_01/win.112/e18754/featLINQ.htm -
I have started developing a small application in WPF. Since I am completely new to it, to start with I took a microsoft's sample available at
Microsoft Sample Application and following the pattern of the sampke I have been so far successful in creating four different views for their corresponding
master tables. Unfortunately, I have got stuck up as the sample does not contain pattern for creating ViewModel when there is a many-to-many relationship in the database. In my application, I have the following data structure:
1. Table Advocate(advId, Name)
2. Table Party (partyId, Name)
3 Table Case (caseId, CaseNo)
4. Link Table Petitioner (CaseId, PartyId)
5. Link Table Respondent (CaseId, PartyId)
6. Link Table EngagedAdvocate(CaseId, advId)
7. Link Table EngagedSrAdvocate(CaseId, advId)
In the scenario above, I am a bit confused about how to go forward creating the required ViewModel which would render me to have multiple instances of Petitioners, Respondents, Advocates and SrAdvocates.
Please explain details in step by step manner considering that whatever work I have completed so far is a replica of Microsoft's sample referred above. I would also like to mention that I have developed my application
using VB.net. So please provide solution in vb.net.
After getting many-to-many relationship introduced into my application, it would achieve one level above the sample application and I would like to share with the community so that it could be helpful to many aspiring developers seeking help with MVVM.Hi ArunKhatri,
I would suggest you referring to Magnus's article, it provides an example of how you could display and let the user edit many-to-many relational data from the Entity Framework in a dynamic and data-bound DataGrid control in WPF:
http://social.technet.microsoft.com/wiki/contents/articles/20719.wpf-displaying-and-editing-many-to-many-relational-data-in-a-datagrid.aspx
You can learn how to design the ViewModel and the relationship between the entities.
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