[MonetDB-users] ADO .net provider & ODBC error

18 May 2009

      Hi,
   Is there any ADO .net provider for MonetDB?

   We tried to use odbc driver in C#. When fecth unicode Chinese values,
some error ocurred:

System.InvalidOperationException
  Message="Internal .Net Framework Data Provider error 30."
  Source="System.Data"
  StackTrace:
       at System.Data.ProviderBase.DbBuffer.Validate(Int32 offset, Int32
count)
       at System.Data.ProviderBase.DbBuffer.PtrToStringUni(Int32 offset,
Int32 length)
       at System.Data.Odbc.OdbcDataReader.internalGetString(Int32 i)
       at System.Data.Odbc.OdbcDataReader.GetString(Int32 i)
       at MonetDBTest.Form1.button1_Click(_object_ sender, EventArgs e) in
E:\D_Bak\~MyWorks\MonetDB\MonetDBTest\Form1.cs:line 41
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.PerformClick()
       at System.Windows.Forms.Form.ProcessDialogKey(Keys keyData)
       at System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
       at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
       at
System.Windows.Forms.Control.PreProcessControlMessageInternal(Control
target, Message& msg)
       at
System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
       at
System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FPreTranslateMessage(MSG&
msg)
       at
System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData)
       at
System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32
reason, ApplicationContext context)
       at
System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason,
ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at MonetDBTest.Program.Main() in
E:\D_Bak\~MyWorks\MonetDB\MonetDBTest\Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[]
args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(_object_ state)
       at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, _object_ state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

Regards,
Zheng Han