ColumnChanging event not firing in DataGrid

[goneWildCoder]

Hi all,

I have a ColumnChanging event attached to a dataset to perform validations. For some reason unknown to me, the event does not get fired when the user presses the 'tab' key with a null cell.

I am trying to make sure that no cell is null. When no value is entered in a cell, and the column is changed, I want the ColumnChanging event to capture it and throw a messagebox to the user. Please help.

Here is what I have -->


private void Division_ColumnChanging(object sender, System.Data.DataColumnChangeEventArgs e)
{
...
..
.

if ( (e.Column.ColumnName.Equals("Div_Code")) ||
(e.Column.ColumnName.Equals("Div_Name")) )
{
if(e.ProposedValue.ToString().Length == 0)
{
MessageBox.Show("Column " + cs.HeaderText + " cannot be null.", "SPIRIT2 - Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

dataGrid1.CurrentCell = (DataGridCell) sender;
}

}

...
..
.

}

 

[shaddow]

I think that depends on how it's fired the event inside a cell. The cell could expect a non null data to fire the event.

________
George, M
Searches(faq333-4906),Carts(faq333-4911)

 

[goneWildCoder]

ColumnChanging event does not fire when the value in a cell is not changed....

 

[Kris11]

I don't know whether I understood you correctly, are you trying to find out an event which will fire everytime user "TAB" through a any field. If so you are using the wrong event. ColumnChanging occurs only when a value in the datacolumn is changed. You should add an OnKeyPress event handler to the grid and then should trap the "TAB" key there.

-Kris