ListBox throwing ArgumentOutOfRangeException when adding to DataSource

Question

I'm trying use a BindingList as a DataSource for a ListBox in C# WinForms, but whenever I try to add items to the BindingList, I get an ArgumentOutOfRangeException thrown. The following code demonstrates the problem (assume a form with ListBox listBox1):

BindingList<string> dataSource = new BindingList<string>();
listBox1.DataSource = dataSource;
dataSource.Add("Test1"); // Exception, here.

Note that if dataSource already has items in it, I do not get the exception:

BindingList<string> dataSource = new BindingList<string>();
dataSource.Add("Test1");
listBox1.DataSource = dataSource;
dataSource.Add("Test2"); // Appears to work correctly.

I can work around the problem by setting the DataSource property to null before adding an item, and re-setting the DataSource afterward, but this feels like a hack, and I'd like to be able to avoid doing so.

Is there a (non-hack) way to use an empty DataSource on a ListBox, such that adding items to it doesn't throw exceptions?

Edit: Stack Trace:

System.Windows.Forms.dll!System.Windows.Forms.ListBox.SelectedIndex.set(int value) + 0x1ec bytes
System.Windows.Forms.dll!System.Windows.Forms.ListControl.DataManager_PositionChanged(object sender, System.EventArgs e) + 0x2e bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.OnPositionChanged(System.EventArgs e) + 0x39 bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.ChangeRecordState(int newPosition, bool validating, bool endCurrentEdit, bool firePositionChange, bool pullData) + 0x14f bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.List_ListChanged(object sender, System.ComponentModel.ListChangedEventArgs e) + 0x2e4 bytes
System.dll!System.ComponentModel.BindingList.OnListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x17 bytes
System.dll!System.ComponentModel.BindingList.FireListChanged(System.ComponentModel.ListChangedType type, int index) + 0x35 bytes
System.dll!System.ComponentModel.BindingList.InsertItem(int index, System._Canon item) + 0x3f bytes
mscorlib.dll!System.Collections.ObjectModel.Collection.Add(System._Canon item) + 0x76 bytes

Answer 1

It turns out I had everything checked in the "Exceptions" dialog (Debug->Exceptions). So, the exception exists, but is (silently) handled by the .Net framework. Continuing program execution displays the expected results.

Answer 2

Do you possibly have an event handler attached to some event on your ListBox that could be causing this? I am not able to reproduce the behavior you're describing.

I created a completely blank WinForms project, with a single ListBox bound to a BindingList<string>, added the value "Test" to the list (after setting the ListBox.DataSource property), and the item "Test" appeared in the box, as expected.

I'd take a look at your ListBox as well as your BindingList<string> to see if either one has some attached event handlers you might be missing.

Answer 3

I had the same problem and after several research, I found that the only workaround to avoid this .Net error was to assign only the BindingList to the DataSource when the list is not empty.

If it can change, you can make a dummy object that you always keep in the list, and you removed it when the list is not empty.

Finaly, its not worth it to find a way to avoid ArgumentOutOfRangeException to be thrown.