Call StoreProcedure in Code First Entity FrameWork

i want to call store procedure by Code First Entity Framework and language:c# . it return one value of string.can i help me?

hi,
try this link :
http://stackoverflow.com/questions/3500509/calling-user-defined-functions-in-entity-framework-4
this also can help
http://blogs.msdn.com/b/efdesign/archive/2011/01/21/table-valued-function-support.aspx
and this:
http://www.entityframeworktutorial.net/EntityFramework5/table-valued-function-in-entity-framework5.aspx

Similar Messages

Calling Oracle stored procedure with out param of user define type from Entity Framework 5 with code first

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

Entity framework code first inheritance table per type problem

hello
i am using ODP.NET version 11.2.0.3.20. i am trying to get entity framework code first to work. one problem i have encountered is with inheritance. i have a "table per type" inheritance scenario. i have 3 tables involved. the base table is called "S_PERIOD" which maps to the base "Period" class. i have a derived table called "S_SEASON_QUARTER" that maps to the derived "Quarter" class. And I have another derived table called "S_SEASON_PRICE_PERIOD" that maps to the derived "PriceBreak" class. for testing purposes i am trying to load all records. the problem is that every class instance ends up being of type "Quarter", which is incorrect. for whatever reason the provider thinks that every "S_PERIOD" record has a corresponding "S_SEASON_QUARTER" record. i took a look at the generated SQL and posted it down below. looking at this SQL it's clear to me why every object ends up being of type "Quarter". It looks like the provider is checking the "C2" field to determine the concrete type to instantiate. the problem however is that the "C2" field value provided by each derived table is ALWAYS equal to "1", which is a problem since this will result in the "case" statement always hitting the second "when" condition. does anyone have any idea how to fix this? thank you
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"."PERIOD_ID" AS number(10,0)) AS "C2",
"Extent1"."START_DATE" AS "START_DATE",
"Extent1"."END_DATE" AS "END_DATE",
"Extent1"."NAME" AS "NAME",
"Extent1"."TYPE_CODE" AS "TYPE_CODE",
CAST( "Extent1"."CREATE_USER_ID" AS number(10,0)) AS "C3",
"Extent1"."CREATE_DATE" AS "CREATE_DATE",
CAST( "Extent1"."MODIFY_USER_ID" AS number(10,0)) AS "C4",
"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
     "Extent2"."QUARTER_NAME" AS "QUARTER_NAME",
     CAST( "Extent2"."QUARTER_ID" AS number(10,0)) AS "C1",
     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
     CAST( "Extent3"."PRICE_PERIOD_ID" AS number(10,0)) AS "C1",
     1 AS "C2"
     FROM "DBO_SPACE_DEV"."S_SEASON_PRICE_PERIOD" "Extent3" ) "Project2" ON ( CAST( "Extent1"."PERIOD_ID" AS number(10,0))) = "Project2"."C1"
Edited by: 997830 on Apr 3, 2013 8:40 AM

An 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.
Does the ODP.Net driver really work with EF? If so, can anyone provide me with a working sample project?

Entity Framework - Code First - Migration - How to access SQL Server and Oracle using the same context?

Hello,
I use Entity Framework code first approach.
My project is working fine with SQL Server. But, I want to access Oracle too. I want to switch SQL Server and Oracle in run time.
I am able to access Oracle using "Oracle.ManagedDataAccess.EntityFramework.dl" in a new project.
But, Is this possible to access SQL Server and Oracle in the same project.
Thanks,
Murugan

This should be possible with a Code-First workflow. In Code-First the database mapping layer is generated at runtime.
David
David http://blogs.msdn.com/b/dbrowne/

Boolean types with entity framework code first and oracle provider

Working in a application that has to work in oracle and sqlServer. In SqlServer we have used "Bit" to store booleans and in oracle number(1).
Have check other threads in this forum, but didnt find any that fix my problem, sorry if this may have been discused before.
We have created a code first model were we find few bool properties mapped to database fields.
for example:
public partial class ZPruebaBooleano
public int Numero { get; set; }
public bool Booleano { get; set; }
Mapped as:
this.ToTable("ZPRUEBABOOLEANO", schema);
this.HasKey<int>(t => t.Numero);
this.Property(t => t.Numero).HasColumnName("NUMERO");
this.Property(t => t.Booleano).HasColumnName("BOOLEANO");
Also, sw added to the application configuration file (for simplicity we have test it without the use of any additional dll):
<oracle.dataaccess.client>
<settings>
<add name="bool" value="edmmapping number(1,0)" />
<add name="byte" value="edmmapping number(3,0)" />
<add name="int16" value="edmmapping number(4,0)" />
<add name="int32" value="edmmapping number(9,0)" />
<add name="int64" value="edmmapping number(18,0)" />
</settings>
</oracle.dataaccess.client>
I am confident that the provider factory read it when creating the model, because it provokes an exception if i add an invalid entry in any of the type names mapped in the file.
As i have find in other forums, this should work. But now i am not sure if should work always, including code first.
I have this exception when i excecute the code (translated from spanish, sorry for any mistake):
Type 'Edm.Boolean[Nullable=False,DefaultValue=]' from 'Booleano' to type'PruebaBooleanos.ZPruebaBooleano' is not compatyble with 'OracleEFProvider.number[Nullable=False,DefaultValue=,Precision=38,Scale=0]'
Its funy that says Precision=38. The database is Number(1), i am sure about that, in fact this is the script:
CREATE TABLE ZPRUEBABOOLEANO
NUMERO NUMBER(15),
BOOLEANO NUMBER(1)
Also, i find it interesting that i was having this mistake even when i was not informing the table i was maping, like if the oracle provider didnt even check if the column was number(anything). Right now is well maped, table and schema.
I have test to create an integer property wrapped by the boolean one, as we can see in this code.
namespace PruebaBooleanos
public partial class ZPruebaBooleano
public int Numero { get; set; }
public bool Booleano
get
return iBooleano == 1 ? true : false;
set
iBooleano = value ? 1 : 0;
public int iBooleano { get; set; }
in this last case i ignored the boolean and mapped the integer.
That worked ok in oracle. But added 2 problems:
1. It fails in SqlServer, because in sql server is bit
2. Cant query the entity model using the boolean property as it is not maped to Database.
I could change the bit field in SqlServer to Number.
But i would like to keep bit in sqlserver and number(1) in oracle.
Anyone had a similar problem?
I am open to any ideas, thanks !!!
libo

It's cool. :)
Sure. I can upload an EDMX file that works against my database if you want to look at it. The relevant parts are probably much like you'd expect. I've removed some columns from this version to make it easier to read.
From the SSDL:
        <EntityType Name="PARAMETER">
          <Key>
            <PropertyRef Name="PARAMETER_CD" />
          </Key>
          <Property Name="PARAMETER_CD" Type="number" Nullable="false" Precision="4" />
          <Property Name="PARAMETER_ACTIVE_INDR" Type="number" Nullable="false" Precision="1" />
        </EntityType>From the CSDL:
<EntityType Name="PARAMETER">
          <Key>
            <PropertyRef Name="PARAMETER_CD" />
          </Key>
          <Property Type="Int16" Name="PARAMETER_CD" Nullable="false" />
          <Property Type="Boolean" Name="PARAMETER_ACTIVE_INDR" Nullable="false" />
        </EntityType>From the C-S mapping:
<EntitySetMapping Name="PARAMETER">
            <EntityTypeMapping TypeName="Model.PARAMETER">
              <MappingFragment StoreEntitySet="PARAMETER">
                <ScalarProperty Name="PARAMETER_ACTIVE_INDR" ColumnName="PARAMETER_ACTIVE_INDR" />
                <ScalarProperty Name="PARAMETER_CD" ColumnName="PARAMETER_CD" />
              </MappingFragment>
            </EntityTypeMapping>
          </EntitySetMapping>Also worth noting that the EDMX mapper probably won't set the provider and token correctly:
<Schema Namespace="Model.Store" Alias="Self" Provider="Oracle.DataAccess.Client" ProviderManifestToken="11.2" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl">Full version is available at http://www.hiredgoons.ca/DataImport.edmx . This is an early development one so I make no apologies for not renaming columns to something readable. ;) It does work correctly as I've had it in testing (taking data from a 170MB excel file and putting it into Oracle using the model). It was created using DB First.
When you have it load at runtime, you need the application configuration settings to map bool to number(1). If that's in app.config or web.config it'll pick it up. Probably worth noting that if you don't have the configuration setting and you load this, the model doesn't validate correctly. As soon as you try to create a DbContext from it, you get an immediate exception that number(1) doesn't map to boolean.
Edited by: Tridus on Nov 21, 2012 3:37 PM

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 08:18

I 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

"Object reference not set to an instance of an object." in Visual Studio 2012 Entity Framework Model-First

Hello
We're trying to use a Model-First with Entity Framework in Visual Studio, targeting an Oracle XE 11g installation.
No matter from what angle we're approaching the issue, we always end up with an "Object reference not set to an instance of an object" in Visual Studio:
First way:
- Add new ADO.NET Entity Framework Model to a .NET Framework 4.5 project
- Empty model
- Add some entities and associations
- Set Database Generation Workflow to "Generate Oracle Via T4 (TPT).xaml"
- Set DDL Generation Template to "SSDLToOracle.tt"
- Generate Database From Model
- VS asks for DB connection ==> Click "New Connection"
- Enter the connection properties to the Oracle XE database. "Test Connection" tells me the connection is okay.
- Click OK. Visual Studio shows the following error message:
(here's the image if it's not visible: https://dl.dropboxusercontent.com/u/35614983/vs2012_oracle_ef_error.png)
We also tried to generate the model in VS2010 and then manually transform it to an EF5 / VS2012 model. At the "Generate Database from Model" step, the same error appeared.
We also tried to generate the model from database (Database-First approach). Same error.
My configuration:
- Windows 7 Ultimate 64-bit
- Installed Oracle client: ODTwithODAC1120320_32bit.zip, so the version is 11.2.0.3.20
- Visual Studio 2012 Update 3 (11.0.60610.01)
Thanks for any hints!
EDIT: I just read that ODP.NET doesn't seem to support Entity Framework 5, so I tried a new project with Entity Framework 4.1, but I get the same errors.
EDIT 2: On a 32-bit Windows 7 virtual machine, everything works fine. Seems the problem is only there on my 64-bit Windows 7 machine.

Sorry for the delay on this one. Let me know if you are still seeing this and I will see if we can get more diagnostic info somehow.
That error is basically an exception fault. It means a bug or a misconfiguration of Oracle Developer Tools. Can you try to reinstall ODT and see if you notice any unusual errors during install.. and see if a reinstall fixes the problem?

Enity Framework Code First

I am trying to get the latest provider for EF to work in Code First environment. I got no issue if I build the model through the wizard by pointing it to my DB, but in Code FIrst I cannot connect. Here are my two connection strings:
          <add name="OracleHR"
               connectionString="DATA SOURCE=localhost:1521/XE;PASSWORD=****;PERSIST SECURITY INFO=True;USER ID=HR;"
               providerName="Oracle.DataAccess.Client" />
          <add name="Entities"
               connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=Oracle.DataAccess.Client;provider connection string="DATA SOURCE=localhost:1521/XE;PASSWORD=****;PERSIST SECURITY INFO=True;USER ID=HR"" providerName="System.Data.EntityClient" />
My second connection string works fine and I can get the data, but first one fails with "Network Error"
Suggestions are appreciated.
Thanks.

user13252411 wrote:
When do you plan to support Code First?We haven't announced a date for that yet. Subscribe to our mail list and keep an eye on our .NET Developer Center for updates.

Seeding multiple databases with single Entity Framework context

I am developing a single-instance, multi-tenant web application, with a SQL database using Entity Framework 6 Code-First.
I want to have a separate database for each client, generated from the same EF models, with a single DbContext. The database to connect to will be determined by the subdomain that the client is using the web app from.
This seems to work fine and the correct database is connected to depending on the subdomain. However my issue is seeding the databases with data. This is the code I have:
foreach (var connString in ConfigurationManager.ConnectionStrings.Cast<ConnectionStringSettings>()))
Configuration.PerformDatabaseMigration(connString.Name);
This then calls the PerformDatabaseMigration method:
public class Configuration : DbMigrationsConfiguration<DataContext>
public Configuration()
AutomaticMigrationsEnabled = false;
AutomaticMigrationDataLossAllowed = false;
public static void PerformDatabaseMigration(string connStringName)
var databaseInitialiser = new Configuration { TargetDatabase = new DbConnectionInfo(connStringName) };
var dbMigrator = new DbMigrator(databaseInitialiser);
dbMigrator.Update();
protected override void Seed(DataContext context)
base.Seed(context);
var superAdmin = new User { Id = 1, UserName = "SuperAdmin" };
context.Users.AddOrUpdate(superAdmin);
The issue is that when seeding this data for the second database, the context passed into the Seed method already has the admin user added to the `DbSet<User>` property of the context, even though the context is for the second databse connection, not
the first. It appears that the context is not being cleared from seeding the first database, and so I receive a `DbUpdateException`, as my User.Username field is a unique index.
Cannot insert duplicate key row in object 'dbo.Users' with unique index 'IX_UserName'. The duplicate key value is (SuperAdmin).\r\nThe statement has been terminated.
public class User : ModelBase, IUserIdentity, IPrincipal, IIdentity
[Index(IsUnique = true)]
[Required]
[StringLength(40)]
public string UserName { get; set; }

Hello Attune,
>>This seems to work fine and the correct database is connected to depending on the subdomain. However my issue is seeding the databases with data.
Is that you firstly create these databases and then call the PerformDatabaseMigration method to seed these database with data? Do you have a try to seed these database data when creating the database with AutomaticMigrationsEnabled = true; with your provided
configuration class, I tested it and it could work as seeding same data to different database:
internal sealed class Configuration : DbMigrationsConfiguration<CFs.CFContext>
public Configuration()
AutomaticMigrationsEnabled = true;
public static void PerformDatabaseMigration(string connStringName)
var databaseInitialiser = new Configuration { TargetDatabase = new DbConnectionInfo(connStringName) };
var dbMigrator = new DbMigrator(databaseInitialiser);
dbMigrator.Update();
protected override void Seed(CFs.CFContext context)
base.Seed(context);
var superAdmin = new ApplicationUser() { ApplicationUserID = 1, FirstName = "", LastName = "" };
context.ApplicationUsers.AddOrUpdate(superAdmin);
Regards.
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Need some samples to make Entity framework interact with WPF

HI guys,
I need to create an app which will query all details about customer from very big database for different search crieria. I don't have any sp to call individual section details of customer. so i planned to go with Entity framework and WPF. Both are new to
me.
Could someone please help me with creating good WPF application (beautiful look and feel) & entity framework interaction with DB?
or any other to make this requirement in an easy way with latest technologies.. All i need some good UI for searching customer details..
thanks in advance
Regards
bala
Balamurugan

I (obviously) agree my sample is something to look at.
Since it's the first in a series rather than a complete guide it cuts a number of corners.
One to emphasise is that I almost never allow a user to edit in a datagrid directly.
I either use popups so they are forced to work on one record at a time.
Or I have a different usercontrol for a particular task a user does - like raising an order say.
The second in the series is on the way. Not sure when exactly but next month. I have the code ready but I've not written the article for it yet. Depending on your timescales you might find that useful.
Also read this:
http://social.technet.microsoft.com/wiki/contents/articles/26673.wpf-collectionview-tips.aspx
That explains some dynamic filtering on the client and touches on a way to haul bits of a HUGE set of data onto the client.
You definitely don't want to do that all at once.
The thing to emphasis is you should always be looking to give the user a subset to look at.
Think in terms of a maximum of 200 to 300 records at a time in a datagrid.
Linq with EF offers pass through queries.
You will almost certainly want to use that feature in order to pick all the customers starting with the letter A or in town xyz or whatever.
You use linq on the client and it is turned into sql on the database.
One thing which is sort of odd about linq is that the sql is generated when you iterate a collection. That has an odd benefit which is great for flexible querying.
You can base one linq query on another and chain your various criteria together.
That only generates sql when you use that end result.
Hope that helps.
Recent Technet articles:
Property List Editing;
Dynamic XAML

Update the database structure from entity Framework Model

Hello !
I'm using VB.net , EF6 with SQL server 2008R2 database.
This is the situation :
I have created the application. Using wizard I have created the Entity model from an existing database.
A client start using this application using this database on his computer.
After some month , I made some modifications on the database and I have updated the model on my application .
Now I have a new .exe file that has the new model from the new database.
I put the new .exe file on the client computer.
Now on his computer : The .exe file has the new database model , but the sql server database has the old structure.
I want to know : Is possible to update the database structure from the entity model on application ?
I want to add a command on application that can make ( if is possible ) this update , so the database become up to date according to entity model ?
Thank you !

Hello,
From your description, it seems that you want to apply a migration for a database first approach, unfortunately, as far as I know, EF Migrations is a product targeted at Code First and doesn't support Database First operations. A workaround I know is to
use update-scripts. If your database structure would be changed frequently, it is recommended to use the Code First approach which would have a better workaround for migrations, for details, you could refer to this
video,
and with the
Entity Framework Power Tools, it is easy to create a code first based project form an existing database.
Regards.
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Good or Bad: Repository pattern with Entity framework??

Suggestions about not to use enttity framework because:
1) entity framework is itself a Repository pattern
2) So, what the use of having one more repository pattern over an exisitng repositroy pattern (i.e Entity framework)
Please suggest.
Thanks in advance!!

I've used both nHibernate and the Entity Framework 6 and nHibernate wins hands down as the best orm, despite it's learning curve. ORMs can be massive timesavers as you don't end up writing boiler plate db access code.
I used 3 different versions on nHibernate over the years. I didn't paticulalry care for any version of nHibernate. I much prefer EF over nHibernate any day of the week, month or year.
Unlike the previous responder I disagree with testability, each repository should have it's own interface. And if implemented correctly it can save tones of time as you need only mock one or two repository methods rather than 10s or 100s of database
gateway call using one class per table.
What? Like a DAO can't have an interface, which is just as testable as any repository pattern using an interface when using a test harnerss and testproject to test the DAO? And one has to go beyond some generic repository pattern in
unit, functional and intergation testing when it comes to data access.
Unlike you, I want complete control of the object all aspects of it even in its usage of other DAO(s) that could or would be used, which the repository pattern doesn't cut it for me.
Like I said, I'll take EF over nHibernate, which is much like talking MS SQL Server over Oracle with Oracle being a PITA to work with it.

Using Entity Framework with SQL Azure - Reliability

(This is a cross post from http://stackoverflow.com/questions/5860510/using-entity-framework-with-sql-azure-reliability since I have yet to receive any replies there)
I'm writing an application for Windows Azure. I'm using Entity Framework to access SQL Azure. Due to throttling and other mechanisms in SQL Azure, I need to make sure that my code performs retries if an SQL statement has failed. I'm trying to come up with
a solid method to do this.
(In the code below, ObjectSet returns my EFContext.CreateObjectSet())
Let's say I have a function like this:
public Product GetProductFromDB(int productID)
return ObjectSet.Where(item => item.Id = productID).SingleOrDefault();
Now, this function performs no retries and will fail sooner or later in SQL Azure. A naive workaround would be to do something like this:
public Product GetProductFromDB(int productID)
for (int i = 0; i < 3; i++)
try
return ObjectSet.Where(item => item.Id = productID).SingleOrDefault();
catch
Of course, this has several drawbacks. I will retry regardless of SQL failure (retry is waste of time if it's a primary key violation for instance), I will retry immediately without any pause and so on.
My next step was to start using the Transient Fault Handling library from Microsoft. It contains RetryPolicy which allows me to separate the retry logic from the actual querying code:
public Product GetProductFromDB(int productID)
var retryPolicy = new RetryPolicy<SqlAzureTransientErrorDetectionStrategy>(5);
var result = _retryPolicy.ExecuteAction(() =>
return ObjectSet.Where(item => item.Id = productID).SingleOrDefault;
return result;
The latest solution above is described as ahttp://blogs.msdn.com/b/appfabriccat/archive/2010/10/28/best-practices-for-handling-transient-conditions-in-sql-azure-client-applications.aspx Best Practices for Handling Transient Conditions in SQL Azure Client
Application (Advanced Usage Patterns section).
While this is a step forward, I still have to remember to use the RetryPolicy class whenever I want to access the database via Entity Framework. In a team of several persons, this is a thing which is easy to miss. Also, the code above is a bit messy in my
opinion.
What I would like is a way to enforce that retries are always used, all the time. The Transient Fault Handling library contains a class called ReliableSQLConnection but I can't find a way to use this with Entity Framework.
Any good suggestions to this issue?

Maybe some usefull posts
http://blogs.msdn.com/b/appfabriccat/archive/2010/12/11/sql-azure-and-entity-framework-connection-fault-handling.aspx
http://geekswithblogs.net/iupdateable/archive/2009/11/23/sql-azure-and-entity-framework-sessions-from-pdc-2009.aspx

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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Could not load file or assembly entity framework 5 .Access denied

Hi All,
I am using secure store applicatin id(set credentials using my windows account) to get the data from sql server using entity framework and WCF.
When trying to run webservice I am getting below error
System.IO.FileLoadException: Could not load file or assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.
here i am trying to impersonate using my account. All works well when I give access to bin folder.
But this is not correct. I can't give access to myself to bin folder or temp .
is there anyway to get rid of this error.
Any help is appreciated.

I think giving access to bin or temp folder is not good. Also, EF dll in Gac is not good approach.
I am wodering why the first time deployed dll is working and if i do iisreset then it's not working
below is the detail error
System.IO.FileLoadException: Could not load file or assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.
File name: 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'     at test.test.Services.PropertyService.GetAllProperties(Nullable`1 startRow, Nullable`1 itemCount)     at test.test.Services.PropertyService.GetAllProperties(Nullable`1
batchSize) in d:\user\PropertyServices\test.test.Services\PropertyService.svc.cs:line 36    === Pre-bind state information === LOG: User = Unknown LOG: DisplayName = EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
(Fully-specified) LOG: Appbase = file://...
07/02/2014 13:49:52.69* w3wp.exe (0x05AC)                       0x3630 test SharePoint     Error
00000 High    .../E:/Sites/ LOG: Initial PrivatePath = E:\Sites\bin Calling assembly : test.test.Services.Model, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null. === LOG: This bind starts in default
load context. LOG: Using application configuration file: E:\Sites\web.config LOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet.config LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v4.0.30319\config\machine.config.
LOG: Post-policy reference: EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 LOG: Attempting download of new URL
file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/6a4208e7/8a408e87...
07/02/2014 13:49:52.69* w3wp.exe (0x05AC)                       0x3630 LandSecurities SharePoint     Error
00000 High    .../EntityFramework.DLL. LOG: Attempting download of new URL
file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/6a4208e7/8a408e87/EntityFramework/EntityFramework.DLL. LOG: Attempting download of new
URL file:///E:/Sites/bin/EntityFramework.DLL. ERR: A fatal error occurred when retrieving next codebase for download (hr = 0x80070005).

Call StoreProcedure in Code First Entity FrameWork

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