How to display sum of particular column in GridView Footer.

The following code sample shows how to display text in GridView Footer.

Stpes:

1) Set GridView ShowFooter property to true;

2) Write the below code in GridView_RowdataBound Event

     
  if ( e.Row.RowType == DataControlRowType.DataRow )
            sum = sum + Convert.ToInt32 ( e.Row.Cells [ 0 ].Text );
        else if ( e.Row.RowType == DataControlRowType.Footer )
            e.Row.Cells [ 0 ].Text = sum.ToString ( "c" );