Devart Forums

Posted: **Thu 09 Jun 2011 09:54**

Hey
Using your componets: 6.30.165 with VB.NET 2010
When I run the following code a second time:

Using mmydatacontext As New VOptNeuContext.VOptNeuDataContext With {.Log = Console.Out}
            Dim Kunde = From Query In mmydatacontext.Kundenstamms Where _
                        Query.Nname = "Mayer" And Query.Vname = "Muster"

            bsTryIt.DataSource = Kunde
            bsTryIt.Clear() 'At second Time running this query, I get the error: Cannot remove an entity that has not been attached.
        End Using

I get an error:

Cannot remove an entity that has not been attached.

Stacktrace:
bei Devart.Data.Linq.Table.b(Object A_0, MetaType A_1, Dictionary`2 A_2, Boolean A_3)
bei Devart.Data.Linq.Table.b(Object A_0, Boolean A_1)
bei Devart.Data.Linq.Table`1.DeleteAllOnSubmit[TSubEntity](IEnumerable`1 entities)
bei Devart.Data.Linq.DataBindingList`1.a()
bei System.Collections.ObjectModel.Collection`1.Clear()
bei System.Windows.Forms.BindingSource.Clear()
bei DevartPr.Form1.myError() in C:\Users\Intelli Soft\documents\visual studio 2010\Projects\DevartPr\Form1.vb:Zeile 12.
bei DevartPr.Form1.Button1_Click(Object sender, EventArgs e) in C:\Users\Intelli Soft\documents\visual studio 2010\Projects\DevartPr\Form1.vb:Zeile 17.
bei System.Windows.Forms.Control.OnClick(EventArgs e)
bei System.Windows.Forms.Button.OnClick(EventArgs e)
bei System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
bei System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
bei System.Windows.Forms.Control.WndProc(Message& m)
bei System.Windows.Forms.ButtonBase.WndProc(Message& m)
bei System.Windows.Forms.Button.WndProc(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
bei System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
bei System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
bei System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
bei System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
bei System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
bei System.Windows.Forms.Application.Run(ApplicationContext context)
bei Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
bei Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
bei Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
bei DevartPr.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:Zeile 81.
bei System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
bei System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
bei Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
bei System.Threading.ThreadHelper.ThreadStart_Context(Object state)
bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
bei System.Threading.ThreadHelper.ThreadStart()[/code]

Posted: **Thu 09 Jun 2011 15:36**

We have reproduced the issue, and will inform you as soon as it is fixed. As a workaround, you can disable caching compiled queries. To do so, you can, e.g., comment the following line in DataContext1.Designer.vb:

Code: Select all

Public Shared compiledQueryCache As Devart.Data.Linq.CompiledQueryCache = Devart.Data.Linq.CompiledQueryCache.RegisterDataContext(GetType([YourDataContext]))

JIC: we have already answered you by mail; apparently, the letter was blocked by your mail filter.

Posted: **Mon 20 Jun 2011 08:32**

Hey

has the New Version of your product include a fix to this problem?

Posted: **Wed 22 Jun 2011 14:50**

We have fixed this issue, but the fix will be available in the next build only. We will post here when this build is released.

Devart Forums

BindingSource.Clear comes up with an error

BindingSource.Clear comes up with an error