protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int     rowupdate = e.RowIndex;
        String  emailid   = (String)GridView1.Rows[rowupdate].Cells[4].Text;
        clsuser objreg    = new clsuser();

        try
        {
            objreg.Delete(emailid);
            GridView1.EditIndex = -1;
            populateGridview();
        }
        catch (Exception err)
        {
            lblmsg.Text = err.Message;
        }
    }