RowValidating throws an exception

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VB8

VB

Hi folks

I use DataGridView in my project. Everything worked fine until I added some code in the RowValidating event. During the form_load event exception is thrown on the statement that set the datasource of the DataGridView.

The project uses bindingsource for the datasource of the DataGridView. My validating code is shown below:

Dim currentRow As DataGridViewRow = Me.dgExpenditure.Rows(e.RowIndex)
Dim incexpCell As DataGridViewCell = currentRow.Cells(0)

If Not Me.closingBoolean Then
If incexpCell.FormattedValue.ToString = String.Empty Then
Me.showExpIncAccCellError(incexpCell)
e.Cancel = True
Else
Me.clearCellError(incexpCell)
e.Cancel = False
End If
Else

Me.dgExpenditure.ShowCellErrors = False
Me.dgExpenditure.ShowRowErrors = False

End If

Thanks in advance.