Delete,Edit record from Gridview

Edit record from Gridview in ASP.Net using RowEditingg Event.
 protected void Gridview1 _RowEditing(object sender, GridViewEditEventArgs e)
    {
             strId= gv.Rows[e.NewEditIndex].Cells[0].Text;
    }


Delete record from Gridview in ASP.Net using RowDeleting Event.


protected void gridview1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string ReferralId = (gv.Rows[e.RowIndex].Cells[0]).Text;
        Delete("usp_DeleteCisomer " + ReferralId + "");
        lblError.Text = "Record Delete Successfully!";
 }