protected void GridView1_RowUpdating(object sender, System.Web.UI.WebControls.GridViewUpdateEventArgs e)
{
//int city_id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
Label lbl_id = (Label)row.FindControl("lbl_ecity_id");
TextBox txt_city = (TextBox)row.FindControl("txt_city_name");
GridView1.EditIndex = -1;
int i = bl.update_city(Convert.ToInt32(lbl_id.Text), txt_city.Text);
databind_city();
}