protected void bt_Delete_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in gv_List.Rows)
        {
            CheckBox cbx = (CheckBox)row.FindControl("cbx");
            if (cbx != null && cbx.Checked)
            {
                int id = (int)gv_List.DataKeys[row.RowIndex][0];
                CM_RebateRule_ApplyCityBLL bll = new CM_RebateRule_ApplyCityBLL(id);
                bll.Delete();
            }
        }

        BindGrid();
    }
    protected void bt_Delete_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in gv_List.Rows)
        {
            CheckBox cbx = (CheckBox)row.FindControl("cbx");
            if (cbx != null && cbx.Checked)
            {
                int id = (int)gv_List.DataKeys[row.RowIndex][0];
                CM_RebateRule_ApplyCityBLL bll = new CM_RebateRule_ApplyCityBLL(id);
                bll.Delete();
            }
        }

        BindGrid();
    }