DataGrid ArgumentOutofRange Exception

[Sean Carpenter]

I have a DataGrid in my application that is bound to a custom collection of
business objects. The collection inherits from CollectionBase so is
bindable. My problem occurs when I remove an item from the collection.
After the removal, any time I click on the grid, I get an un-catchable
ArgumentOutofRange exception. I tried a few workarounds:

1. Before removing an item from the collection, I set the DataSource of the
grid = Nothing. Then I removed the item, set the DataSource back to the
collection, and called Refresh. This caused the grid to re-display with the
removed item gone, but as soon as I clicked on the grid, I got the
exception.

2. I added an IBindingList implementation to my collection and set
SupportsChangeNotification to True. I raised the ListChanged event in the
Add and RemoveAt methods of the collection. This caused the grid to update
correctly without resetting the DataSource, but I still got the exception
when clicking on the grid.

By the way, I get the exception whether or not there are any event handlers
attached to grid. Any advice would be appreciated.

Thanks,
Sean Carpenter

 

[Alex Feinman [MVP]]

When exception is thrown (make sure you do not catch it in code), check the
Call Stack window. Right-click on it and ensure that "Show non-user code" is
on. What are the top few lines of the stack?

 

[Sean Carpenter]

Thanks, Alex, the call stack is below. I took a quick look in Reflector and
it seems like the listposition in the underlying CurrencyManager is still
set to 1 (this is the row I had clicked on before the removal). This is
after I set the DataSource to Nothing and back to the collection.

mscorlib.dll!System.Collections.CollectionBase.System.Collections.IList.get_Item(int
index = 1) + 0x18 bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.EndCurrentEdit()
+ 0x31 bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager._ChangeRecordState(int
nPositionNew = 0, bool fValidating = true, bool fEndCurrentEdit = true, bool
fFirePositionChange = true, bool fPullData = true) + 0x4b bytes
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.set_Position(int
value = 0) + 0x3b bytes
System.Windows.Forms.DataGrid.dll!System.Windows.Forms.DataGrid.OnCurrentCellChanged(System.EventArgs
e = {System.EventArgs}) + 0x16 bytes
System.Windows.Forms.DataGrid.dll!System.Windows.Forms.DataGrid._OnCurrentCellChanged()
+ 0xb bytes
System.Windows.Forms.DataGrid.dll!System.Windows.Forms.DataGridCurrentCell._MoveTo(int
irow = 0, int icol = 1, bool fDrawAndUnselect = true) + 0x1c4 bytes
System.Windows.Forms.DataGrid.dll!System.Windows.Forms.DataGridCurrentCell._MoveToChecked(int
irow = 0, int icol = 1) + 0x6d bytes
System.Windows.Forms.DataGrid.dll!System.Windows.Forms.DataGrid.OnMouseDown(System.Windows.Forms.MouseEventArgs
mea = {System.Windows.Forms.MouseEventArgs}) + 0x84 bytes

Sean Carpenter

 

[Alex Feinman [MVP]]

In my test it worked as expected. Can I see somehow your IBindingList and
IList implementation? POst here or email.