Error occured when adding row in datagrid view

Question

I want to add a new rows in datagridview when cell leave event occurs.It shows error like Operation can not be performed in this event handler...

my code is here

if (e.ColumnIndex == 2)
{
if (dgvItm.Rows[e.RowIndex].Cells[e.ColumnIndex].Value != null)
{
dgvItm.Rows.Add();

dgvItm.Rows[dgvItm.Rows.Count].Cells[0].Value = dgvItm.Rows.Count;

}

Suthish Nair · Answer

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Vulpes · Answer

You're not allowed to add rows to the DGV in the CellLeave eventhandler and also when handling certain other events - see here ( http://msdn.microsoft.com/en-us/library/x0akdhcd.aspx ) for a full list. You'll therefore need to carry out this operation somewhere else.