WinApp : Cannot bind to the property or column Item Name on the DataSource

visual basic 2005, this is my code:

Dim frminterfacea As New frmInterface
frminterfacea.Show()

this loaded up the form frminterface until today. it worked fine yesterday, no change in code, now i get this message at runtime:

ArgumentException [sic] was unhandled
Cannot bind to the property or column Item Name on the DataSource.
Parameter name: dataMember

what went wrong?

Dec 2 '07 #1

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16920

Shashi Sadasivan

1,435

Expert 1GB

any change in the database?

are you sure no one changed the code / DB either?

Dec 2 '07 #2

captainphoenix

im not sure what you mean. There were no code changes. the part of the code that gets highlighted is "form.show". would this be related to any issues with the form it's supposed to load up, or is this somehow just the wrong code?

Dec 3 '07 #3

Shashi Sadasivan

1,435

Expert 1GB

The issue would be that you would have entered some data into the database..
and the data is causing some exceptions (the data, not the scehma).

the show would throw an exception, but if you look at the stack trace it would lead to the Form load event handler for that form.

Try debugging it, and check where in the form load the application throws the exception.

cheers

Dec 3 '07 #4

captainphoenix

ok i think i see where this is going. i did change the names of some of the datasource names, but none of them were actually used. would that affect it?

this is what got attached to my clipboard when i clicked "copy extension detail to the clipboard":

System.ArgumentException was unhandled
Message="Cannot bind to the property or column Item Name on the DataSource.
Parameter name: dataMember"
ParamName="dataMember"
Source="System.Windows.Forms"
StackTrace:
at System.Windows.Forms.BindToObject.CheckBinding()
at System.Windows.Forms.BindToObject.SetBindingManage rBase(BindingManagerBase lManager)
at System.Windows.Forms.Binding.SetListManager(Bindin gManagerBase bindingManagerBase)
at System.Windows.Forms.ListManagerBindingsCollection .AddCore(Binding dataBinding)
at System.Windows.Forms.BindingsCollection.Add(Bindin g binding)
at System.Windows.Forms.BindingContext.UpdateBinding( BindingContext newBindingContext, Binding binding)
at System.Windows.Forms.Control.UpdateBindings()
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.Control.OnParentBindingContex tChanged(EventArgs e)
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.Control.OnParentBindingContex tChanged(EventArgs e)
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.Control.set_BindingContextInt ernal(BindingContext value)
at System.Windows.Forms.ContainerControl.set_BindingC ontext(BindingContext value)
at System.Windows.Forms.ContainerControl.get_BindingC ontext()
at System.Windows.Forms.Control.get_BindingContextInt ernal()
at System.Windows.Forms.Control.get_BindingContext()
at System.Windows.Forms.Control.get_BindingContextInt ernal()
at System.Windows.Forms.Control.get_BindingContext()
at System.Windows.Forms.Control.UpdateBindings()
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.Control.OnParentBindingContex tChanged(EventArgs e)
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.Control.OnParentBindingContex tChanged(EventArgs e)
at System.Windows.Forms.Control.OnBindingContextChang ed(EventArgs e)
at System.Windows.Forms.ContainerControl.OnCreateCont rol()
at System.Windows.Forms.Form.OnCreateControl()
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.ScrollableControl.WndProc(Mes sage& m)
at System.Windows.Forms.ContainerControl.WndProc(Mess age& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.O nMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.W ndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallba ck(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.SafeNativeMethods.ShowWindow( HandleRef hWnd, Int32 nCmdShow)
at System.Windows.Forms.Control.SetVisibleCore(Boolea n value)
at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
at System.Windows.Forms.Control.Show()
at Mando_Books_Sales_Interfae.frmEmployeeID.btnOK1_Cl ick(Object sender, EventArgs e) in C:\Documents and Settings\mike\Desktop\Mando_Books_Sales_Interfae\M ando_Books_Sales_Interfae\frmEmployeeID.vb:line 21
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.TextBoxBase.ProcessDialogKey( Keys keyData)
at System.Windows.Forms.Control.PreProcessMessage(Mes sage& msg)
at System.Windows.Forms.Control.PreProcessControlMess ageInternal(Control target, Message& msg)
at System.Windows.Forms.Application.ThreadContext.Pre TranslateMessage(MSG& msg)
at System.Windows.Forms.Application.ThreadContext.Sys tem.Windows.Forms.UnsafeNativeMethods.IMsoComponen t.FPreTranslateMessage(MSG& msg)
at System.Windows.Forms.Application.ComponentManager. System.Windows.Forms.UnsafeNativeMethods.IMsoCompo nentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.Run MessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.Run MessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationCo ntext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.Run(String[] commandLine)
at Mando_Books_Sales_Interfae.My.MyApplication.Main(S tring[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.Run UsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context( Object state)
at System.Threading.ExecutionContext.Run(ExecutionCon text executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

i don't know if this is what you are looking for, but i remember there was some other error list but i can't remember how i came across it. how do i fix this?

Dec 3 '07 #5

Shashi Sadasivan

1,435

Expert 1GB

Was the datasource name changed which is bound to the contriols?
What about re binding the controls to your datasource!! have you tried that ?

Dec 3 '07 #6

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