It fails in both Release and Debug mode. The application passed all of the
testing in March. It began to be used last week which is when we came across
the error which makes me suspect that a Windows Update might be part of the
problem especially if any new updates contained updates to the .NET framework.
I do not actually use a Dictionary myself, rather from the stack trace, it
appears to be internally used in Microsoft's DataView object.
Basically, I have a form that has a UserControl on it. The UserControl
contains a DataSet, a BindingSource with a filter bound to that DataSet, a
BindingNavigator to navigate sets of records, and a DateTimePicker set to
show only time so the user can modify times in the DataSet. If you need more
detailed information to recreate the problem, please let me know.
Also, I have checked the values in the BindingSource using the Watch window
before the EndEdit method is called and the (BindingSource.Current as
DataRowView)["DateTimeField"] is equal to the expected value. Of course, I
had to loop through the Bindings object of the CurrencyManager for the
BindingSource and call WriteValue() on each Binding so the value from the
DateTimePicker is written to the BindingSource, but it should work fine.
I have other UserControls with the same kind of objects performing similar
operations.
The only noticiable difference between them is that this BindingSource has a
Filter on it.
To recreate the issue from the user perspective, here are the steps:
1. The user clicks the Add Button on the BindingNavigator. This sets focus
to the DateTimePicker allowing the user to enter a valid time.
2. The user enters the time and clicks Save which internally calls
Binding.WriteValue() for each binding and then calls BindingSource.EndEdit()
which throws the error as shown in my previous post.
Any help would be greately appreciated as I am under the gun to get this
issue resolved.
Thanks!
Aaron
"RobinS" wrote:
> As far as it only working when it is deployed, try running it in release
> mode from Visual Studio and see if you can recreate it.
>
> It sounds like you have a value in your row that is null and it is not
> allowed to be. Are you binding a dictionary to something, or using a
> dictionary for a combobox?
>
> RobinS.
> GoldMail.com
> --------------------------------------------
> "Aaron" <(E-Mail Removed)> wrote in message
> news:08A453E7-A646-4C78-9370-(E-Mail Removed)...
> > Environment Information:
> > I am running Visual Studio 2005 Version 8.0.50727.762 (SP.050727-7600) and
> > connecting to a SQL Server 2005 database, although this problem never
> > reaches
> > the database. I am also using Windows XP Professional SP 2.
> >
> > My problem is that when I call the EndEdit() method for my BindingSource,
> > I
> > recieve the following error:
> >
> > System.ArgumentNullException: Value cannot be null.
> > Parameter name: key
> > Stack Trace: at
> > System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
> > at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
> > at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
> > at System.Data.DataView.MaintainDataView(ListChangedType changedType,
> > DataRow row, Boolean trackAddRemove)
> > at System.Data.DataViewListener.MaintainDataView(ListChangedType
> > changedType, DataRow row, Boolean trackAddRemove)
> > at
> > System.Data.Index.<>c__DisplayClass5.<MaintainDataView>b__4(DataViewListener
> > listener, ListChangedType type, DataRow row, Boolean track)
> > at System.Data.Listeners`1.Notify[T1,T2,T3](T1 arg1, T2 arg2, T3 arg3,
> > Action`4 action)
> > at System.Data.Index.MaintainDataView(ListChangedType changedType, Int32
> > record, Boolean trackAddRemove)
> > at System.Data.Index.InsertRecord(Int32 record, Boolean fireEvent)
> > at System.Data.Index.ApplyChangeAction(Int32 record, Int32 action, Int32
> > changeRecord)
> > at System.Data.DataTable.RecordStateChanged(Int32 record1,
> > DataViewRowState oldState1, DataViewRowState newState1, Int32 record2,
> > DataViewRowState oldState2, DataViewRowState newState2)
> > at System.Data.DataTable.SetNewRecordWorker(DataRow row, Int32
> > proposedRecord, DataRowAction action, Boolean isInMerge, Int32 position,
> > Boolean fireEvent, Exception& deferredException)
> > at System.Data.DataTable.InsertRow(DataRow row, Int32 proposedID, Int32
> > pos, Boolean fireEvent)
> > at System.Data.DataView.FinishAddNew(Boolean success)
> > at System.Data.DataRowView.EndEdit()
> > at System.Windows.Forms.CurrencyManager.EndCurrentEdit()
> > at System.Windows.Forms.BindingSource.EndEdit()
> >
> > There is a BindingNavigator and DateTimePicker control bound to the
> > BindingSource. The BindingSource is bound to a TableAdapter on a DataSet.
> > The DateTimePicker is not likely to be a part of the problem because I
> > also
> > tried replacing it with a regular TextBox and the error still occurred.
> >
> > This problem occurs randomly. The application passed all testing and the
> > error did not appear until the application was deployed. The error
> > happens
> > more often than not, but it does not always happen even using the EXACT
> > same
> > steps to create the issue.
> >
> > Please help! If you would like more details on how specific objects are
> > bound, please let me know.
> >
> > Thanks!
>
>
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