VS2008 Linq To SQL Dataset SetDatasource

Here is the problem and I have found no helpful solution. I am using LinqToSQL to pull the data into a dataset. No problems there. The problem comes when assigning that dataset as the datasource for a Crystal Report. When I run the report it says
System.NotSupportedException was unhandled
Message="DataSet does not support System.Nullable<>."
Source="System.Data"
StackTrace:
       at System.Data.DataColumn..ctor(String columnName, Type dataType, String expr, MappingType type)
       at System.Data.DataColumn..ctor(String columnName, Type dataType)
       at System.Data.DataColumnCollection.Add(String columnName, Type type)
       at CrystalDecisions.CrystalReports.Engine.Table.BuildTableFromEnumerable(IEnumerable collection, Type dataClassType, String tableName)
       at CrystalDecisions.CrystalReports.Engine.Table.EnumerableToDataSet(IEnumerable collection)
       at CrystalDecisions.CrystalReports.Engine.Table.WrapAndCacheDotNetObject(Object val, Type type, IntPtr& pUnkDataSet, IntPtr& pDotNetDelegate)
       at CrystalDecisions.CrystalReports.Engine.Table.SetDataSource(Object val, Type type)
       at CrystalDecisions.CrystalReports.Engine.ReportDocument.SetDataSourceInternal(Object val, Type type)
       at CrystalDecisions.CrystalReports.Engine.ReportDocument.SetDataSource(IEnumerable enumerable)
       at Pack_Win.frmReports.crystalReportViewer1_Load(Object sender, EventArgs e) in C:\VersioningVS2008\Pack-Win\Pack-Win\Pack-Win\frmReports.cs:line 32
       at System.Windows.Forms.UserControl.OnLoad(EventArgs e)
       at CrystalDecisions.Windows.Forms.CrystalReportViewer.OnCreateControl()
       at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
       at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
       at System.Windows.Forms.Control.CreateControl()
       at System.Windows.Forms.Control.WmShowWindow(Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:
I have seen references to defaulting the nullables but can't find sample code. Can anyone help with this?

I have the dataset populated using the code below and was able to create a working report.
DataSet fds = new DataSet();
            ReportDocument rd = new ReportDocument();
            if (currfunc == "CustList")
                rd.Load(@".\Reports\CustList.rpt");
                PackWinDataSet.PACK_CUSTOMERDataTable repdt = new PackWinDataSet.PACK_CUSTOMERDataTable();
                PackWinDataSetTableAdapters.PACK_CUSTOMERTableAdapter repdat = new Pack_Win._Pack_WinDataSetTableAdapters.PACK_CUSTOMERTableAdapter();
                repdat.Fill(repdt);
                fds.Tables.Add(repdt);
                rd.SetDataSource(fds);

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Displaying the data from a "LINQ to SQL database"

I have created a LINQ to SQL database with a simple table/class with the following properties:
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For now I have "Auto Generated Value=True" and "Primary Key=True". Is that the right way to go? What do I set for "Auto-Sync"? There are options like "Never, OnInsert, OnUpdate, Always".
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Now first of all, is there a way I can display the database content directly in Visual Studio so I can see if I've manage to add any content in the table? I haven't yet find a way so far.
Second how do I get the content from the datatable row by row and display it in MainWindow.xaml? What would the code look like? For every row I would like it to be displayed like this:
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The idea is that Subject along with the number should have a larger font size, and the Description shoud be a bit smaller font size.

>>For now I have "Auto Generated Value=True" and "Primary Key=True". Is that the right way to go?
Yes, this means that the database takes care of the actual incrementation for you which is perfectly fine and probably what you want.
>>how do I get the content from the datatable row by row and display it in MainWindow.xaml
You need to an ItemsControl that can render all items in a collection somewhere in the MainWindow, e.g.:
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The ItemTemplate (DataTemplate) of the ItemsControl defines the appearance of each item in its ItemsSource collection, i.e. a Reminders object in your case.
You then simply set the ItemsSource of the ItemsControl to the collection of Reminders object that you want to display in it in your code:
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>>is there a way I can display the database content directly in Visual Studio so I can see if I've manage to add any content in the table?
First of all, please don't ask several questions in the same thread. Second, this is not a WPF question. If you are using a service-based database, you could select data from it from the Server Explorer in Visual Studio:
http://msdn.microsoft.com/en-us/library/vstudio/ms233763(v=vs.120).aspx. Otherwise you typically use SQL Sever Management Studio to query a database. For Visual Studio specific questions, please use the Visual Studio forums:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?category=visualstudio%2Cvsarch%2Cvsdbg%2Cvstest%2Cvstfs%2Cvsdata%2Cvsappdev%2Cvisualbasic%2Cvisualcsharp%2Cvisualc
Please remember to mark helpful posts as answer and/or helpful.

Level of local SQLCE/other DB support in windows phone 8.1/using linq to sql from dll?

I have had a mixed opinion for SQLCE support in windows phone 8/8.1. Is their still support for a local SQLCE or other database in windows phone 8.1? (A lot of different blog articles created their own handlers it appears and one used
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Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering
- Yoda. Blog - http://www.computerprofessions.co.nr

Windows Phone Silverlight 8.1 apps can still use LINQ to SQL (System.Data.Linq) see:
http://msdn.microsoft.com/en-us/library/windows/apps/hh202860(v=vs.105).aspx
For Windows Phone 8.1 [runtime] app you would need to use an external library like
SQLite
There is a jumpstart training talk on using SQLite in Windows Phone 8.1 apps here:
http://channel9.msdn.com/Series/Building-Apps-for-Windows-Phone-8-1/19
I'm not sure what you mean by: "...access the local DB from a dll file..." Do you mean you want the library used to access the database to be portable across
platforms?
Eric Fleck, Windows Store and Windows Phone Developer Support. If you would like to provide feedback or suggestions for future improvements to the Windows Phone SDK please go to http://wpdev.uservoice.com/ where you can post your suggestions and/or cast
your votes for existing suggestions.
I saw the first link and I think I have already been through some of that tutorial on channel 9 already.
I'm not sure what you mean by: "...access the local DB from a dll file..." Do you mean you want the library used to access the database to be portable across platforms?
This would be a yes. I need use it to submit an application to the store (I wish to have the data and business logic in the dll file while having the GUI separate). I am currently using the portable dll but if you think using another dll type would help
I will try that. I am a VB.NET programmer and so I can see where some programmers get their worries about SQLCE (It seems a lot of VB and VB.NET programmers like it from my time helping on the VB.NET forums second to SQL Server only).
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering
- Yoda. Blog - http://www.computerprofessions.co.nr
Nevermind, I changed the dll type to "Silverlight" and I can use the System.Data.Linq reference at least.
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to
suffering - Yoda. Blog - http://www.computerprofessions.co.nr

SQL Dataset errors in BIP 11G Trial Edition

Hi
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The SQL queries a package which calls an inline function to return results based on Parameter values.
This works without error both in the 10G instance and when run separately in PL/SQL Developer, but returns:
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Hi Svee
This does work, but I need to have this filter.
Strangely it will work if use 'where 1 = (nvl(:queryTypeID, 1))'. I could maybe try moving it into the 'Conditions' tab of the query builder - but it does not allow this, saying 'the query could not be parsed'.
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thanks
D.
Edited by: Donal on Jul 17, 2012 7:31 AM

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Jinyu Wang ([email protected]):
Have you include JDBC lib in your classpath?<HR></BLOCKQUOTE>
null

Linq to sql return dynamic table

Hi,
I am looking to use linq to sql like I did with ADO and return a dynamic table like I did with a datatable.
I will not know what table/fields will return until runtime. I later want to loop through the return table and get the field names and values.
if this was a datatable it would look something like
System.Data.
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dt = new
DataTable();
foreach
(DataRow
dr in
dt.Rows )
string
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string
values = dr[0].ToString();
Here is my linq to sql but dynamic will not work
var
recordSet = (db.ExecuteQuery<dynamic>(sql,

Andrew;
You seem to be having the same issue I am (for which, by the way, no one seems to have the answers);
1. A data object being passed to your class/methods
2. Another object being passed containing the "fields"/properties the user wants returned from the data
I've been trying to make something like this work
List
IQueryable
subset = from
a in
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(<<dataFields>>);
... Tantamount to passing a fields list into an SQL query (macro expansion?). Unfortunately, LINQ wants to treat whatever is passed in the select
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together from various leads from other posts), but am stuck at this one.
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LINQ to SQL - UPDATE Foreign Key

Hi,
I'm doing a project with LINQ to SQL. I'm mapping the database in code.
I have 2 tables: Cargo(CodCargo PK, Cargo)
Utilizador(CodUtilizador PK, Utilizador, CodCargo FK.
Cargo:
1 - Client
2 - Provider
3 - Administrator
Utilizador:
1 - User1 - 2
2 - User2 - 3
Code in Class Utilizador:
private EntityRef<Cargo> _Cargo = new EntityRef<Cargo>();
[Association(IsForeignKey = true, Storage = "_Cargo", ThisKey = "CodCargo")]
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set
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Cargo newCargo = value;
if (newCargo != oldCargo)
_Cargo.Entity = null;
if (oldCargo != null)
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Best regards,
ADAE.

Hello,
>>//Is is possible to do this:newUser.Cargo.Cargo = "Client"
This is not changed the foreign key constraint, it only performs what you see: change the
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My suggestion is that you could do what I provide, to set it foreign key property.
Regards.
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Linq to SQL Error. The member 'Sel.UserClass.FBId' has no supported translation to SQL.

I'm getting the above error while trying to do a really simple query..
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<Table> _
Public Class UserClass
<Column(IsDbGenerated:=True, IsPrimaryKey:=True)> _
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Set(value As Integer)
m_Id = value
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Private m_Id As Integer
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Get
Return m_FBId
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Set(value As String)
m_FBId = value
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Set(value As String)
m_UserName = value
End Set
End Property
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End Class
Any ideas why ?

Hello,
I am not sure if this is a windows phone question. Maybe you can post thread on LINQ to SQL forum for support.
https://social.msdn.microsoft.com/Forums/en-US/home?forum=linqtosql.
To save your time, you can try to mark FBId property with Column attribute like Id property. This can help LINQ to SQL to know how to make mapping with those properties. Please try it.
Regards,
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the survey.

DataGridView use with LINQ query (MCTS 70-505 Ch 6 Lesson 6 page 321 Exercise 2 "LINQ to SQL")

Option Strict Off
Imports System.Data.Linq
Imports System.Data.Linq.Mapping
<Table(Name:="Customers")> _
Public Class Customer
Dim db As New DataContext("Data Source = .\sqlexpress; Initial Catalog=Northwind; Integrated Security = true")
Dim customers As Table(Of Customer)
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<Column(IsPrimarykey:=True, storage:="_customerID")> _
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Return _customerID
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Set(value As String)
_customerID = value
End Set
End Property
Private _ContactName As String
<Column(Storage:="_ContactName")> _
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Return _ContactName
End Get
Set(value As String)
_ContactName = value
End Set
End Property
Private _CompanyName As String
<Column(Storage:="_CompanyName")> _
Public Overloads Property CompanyName() As String ' does not appear. Its a member of control base class. Shadows does not help, though it should
Get ' because the name of the column in the db happens to be the same as this property of the Control class. Overloads no good either
Return _CompanyName
End Get
Set(value As String)
_CompanyName = value
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Private _Country As String
<Column(Storage:="_Country")> _
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Get
Return _Country
End Get
Set(value As String)
_Country = value
End Set
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Next
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End Sub
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Dim query As Object = From cust As Customer In customers _
Where cust.Country = countryComboBox.SelectedItem.ToString _
Select cust
resultsGrid.DataSource = query
End Sub
This code works as intended up to a point. It displays the countries in the comboBox as intended. Selecting a country then populates the DGV object "resultsgrid" with the customer items. Problem is that the CompanyName column (and therefore
the CompanyName values) are ABSENT from the grid. Clearly the "Resultsgrid.Datasource = query" statement is not working correctly.
You can workaround the fault by replacing this statement with manually adding columns to the resultsgrid and then iterating over the query with a for each loop, adding a row on each iteration. So the query is capturing all the data, including CompanyName.
But it begs the question: why is the CompanyName (among all the cust items) consistently missing from the resultsgrid when the datasource property statement is used? What is so special about CompanyName?

<
Column(Storage:="_CompanyName")>
PublicOverloadsPropertyCompanyName()
AsString'
doesn't appear in DGV. It's a member of control base class. Shadows doesn't help, though it should
Get'
because the name of the column in the db happens to be the same as this property of the Control class. Overloads no good either
Return_CompanyName
EndGet
Set(value
AsString)
_CompanyName = value
EndSet
EndProperty
Howard

Callling pl/sql function in BI DataModel Sql DataSet

I'm creating a BI Data Model where the Data Set is a SQL query. The SQL query calls a pl/sql function.
As a simple SQL query example:
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Returns: ORA-01031: insufficient privileges
Also the return variable is a number data type. Is this ok? Or does it have to be a boolean or varchar?
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Which version of OBIEE using?
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Group Join infoSources In dc.sp_SelectBallotMeasureInfo(Nothing, id)
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Hello RobertRFreeman,
From your description, it seems that your result sets will already be in local, so you could create DTO class to specify the returned column you want. For example,
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Property OrderName As String
Property OrderDetailName As Object
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Property OrderDetailName As String
End Class
The LINQ query:
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Dim result = (From o In db.Orders.ToList
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.OrderDetailName = From oood In OOD
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Regards.
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Stok Program With WCF and linq to sql

It runs on studio but it doesnt run on windows phone.I didnt add wcf,services and sql.Help Me ?

Hi WHAT IS MSDB 'S FULL MEAN,
>>It runs on studio but it doesnt run on windows phone.I didnt add wcf,services and sql
Do you mean that you can not add the WCF Service Reference?
Are you using the Windows Phone Sivlerlight or the Windows Phone Runtime app?
The Windows Phone 8.1 Rutime app does not support the "Add Services Reference", then we need to use the WCF Restful services for instead in Windows Phone 8.1 Rutime app, for more information, please try to refer to this blog:
http://blogs.msdn.com/b/myamama/archive/2014/06/24/workaround-to-adding-service-reference-to-windows-phone-8-1-runtime-app.aspx
Besides, for how to create a WCF Restful Service, please try to refer to this following article:
http://www.codeproject.com/Articles/571813/A-Beginners-Tutorial-on-Creating-WCF-REST-Services .
If I have misunderstood you, please try to describe more about your question and post the error information in here.
Best Regards,
Amy Peng
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Linq to SQL

I am using vs2012 exp, and my operating sys is windows 8.1. sql server 2008 r2 devloper edition
I want create a entity class . So i Found Sqlmetal command line and when i used it gave me error that access to code file is denied.my database is on my sql server .
so I want to know how to create code file . my command line was as under
sqlmetal /server:.\ /database:carrentals /code:Carrentals.vb /namespace:cars /pluralize /functions /sprocs /views

ask here: http://social.msdn.microsoft.com/Forums/en-US/home?forum=linqtosql
post the exact error message when you ask.
Visual C++ MVP

SQLite Linq to SQL novice question

Hello!
I have a simple question about SQLite.
I have small sample DB.
CREATE TABLE table1 (
name VARCHAR,
surname VARCHAR
I inserted 3 records via SQLite manager to this DB.
Now I'd like to read and this DB in c#.
public class SampleDB : DataContext
public Table<Peoples> peoples;
public SampleDB(string connection) : base(connection) { }
[Table(Name = "table1")]
public class Peoples
[Column(Name = "Name")]
public string Name { get; set; }
[Column(Name = "Surname")]
public string Surname { get; set; }
class Program
static void Main(string[] args)
var connection = new SQLiteConnection(@"Data Source=d:\via\simple.sqlite");
var context = new DataContext(connection);
var peoples = context.GetTable<Peoples>();
SampleDB db = new SampleDB(@"Data Source=d:\via\simple.sqlite");
var query = from q in db.peoples
where q.Name == "Alex"
select q;
Variable "Peoples" is working good. But "query" is not working. What's wrong with this code?
Thanks.

I think you're supposed to use a regular SQL query with SQLite. I'm not a SQLite expert so I'm not sure.
Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.
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.

Java.sql.DataSet et al.

I'm using derby (also in the jdk). What happened to the jdbc4 features that were part of Mustang, they are absent in jdk1.6.

When you say using the JDK you mean just using a simple text editor and command line to compile?
I'm not too bothered about decompilation as I doubt anyone would go though the effort to decompile this particular program. As it currently stands I'm the only one known in my college class to try my hand at Java anyway. Anyone else handing a java project in would be very suspicious.
How big would the program be if the JVM was included? Is it an intricate process to combine the two?
I am aware that any code can be decompiled but e.g. VB programs can only be decompiled into assembly... atleast I have yet to see a proper VB decompiler in action.
The app.path Java equivelant I need so the files needed by the program which should be in the same directory can be found with ease.
What compiler did JBuilder come with? It's own or did they simply include Sun's?
Whats the general opinion of V J++? is it pretty much Java or has M$ screwed it over and turned it into their own?
When an argument is passed to a method in Java is it referenced in memory or is a copy created? How do I pass an array to a method? and not create a copy of it? ref?
Can applets perform read and write actions on the machine it is stored? Can I refuse connections if a client is already connected?
Thanx

VS2008 Linq To SQL Dataset SetDatasource

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