How can I trigger the Add New Row on the DataGrid using a separate button. Are there any sample program available for this?
I also need to have a Button to trigger Edit and Delete of a selected row.
The RadGridView exposes some useful Commands, which you can use to achieve the desired behavior. The ones that you need are BeginEdit, BeginInsert and Delete.
Additionally, you can check out the Add a Button Column article, which shows how the commands can be connected to a button.
I hope you find this helpful.