Confirm Delete in DataGrid

[Amelyan]

I found an example (below) in www.codeproject.com showing how to enable
DataGrid's delete buttons with confirmation. However, the example didn't
explain why the complicated if-condition is the way it is.

I tried just having the one line of code that adds confirmation script
without if-condition. However, this didn't work properly. DataGrid would
delete items even though I clicked Cancel in confirmation dialog.

Could anyone explain why the if-condition should be the way it is below in
order for the confirmation to work properly in DataGrid?

Thanks,
Amelyan

//In the DataGrid onItemDataBound method, add the following:

if ( e.Item.ItemType == ListItemType.AlternatingItem
|| e.Item.ItemType == ListItemType.Item
|| e.Item.ItemType == ListItemType.SelectedItem )
{
e.Item.Cells[0].Attributes.Add( "onClick", "return confirm('Are you
sure you wish to delete this record?');");
}
//* Note the magic number [0] should be the column that the button is
located.

 

[Steve C. Orr [MVP, MCSD]]

This article shows how you can confirm a delete in a datagrid:
http://www.dotnetjunkies.com/HowTo/1E7FEE4A-795C-4D33-A135-843EB07C94A8.dcik