void BindData1()
        {
            ClassDistrict d  = new ClassDistrict();
            DataTable     dt = d.GetDistrictSearch(txtSearchDistrictID.Text, txtSearchDistrictTH.Text, txtSearchDistrictEN.Text, txtSearchAmphurID.Text, txtSearchProvinceID.Text, txtSearchPostCode.Text, txtSearchNote.Text);

            GridView1.DataSource = dt;
            GridView1.DataBind();
            SetViewState(dt);
        }
        protected void btnSearchDistrict_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtSearchDistrictID.Text) && string.IsNullOrEmpty(txtSearchDistrictTH.Text) && string.IsNullOrEmpty(txtSearchDistrictEN.Text) && string.IsNullOrEmpty(txtSearchAmphurID.Text) && string.IsNullOrEmpty(txtSearchProvinceID.Text) && string.IsNullOrEmpty(txtSearchPostCode.Text) && string.IsNullOrEmpty(txtSearchNote.Text))
            {
                ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('กรุณากรอก คำค้นหา')", true);

                return;
            }
            else
            {
                ClassDistrict d  = new ClassDistrict();
                DataTable     dt = d.GetDistrictSearch(txtSearchDistrictID.Text, txtSearchDistrictTH.Text, txtSearchDistrictEN.Text, txtSearchAmphurID.Text, txtSearchProvinceID.Text, txtSearchPostCode.Text, txtSearchNote.Text);
                GridView1.DataSource = dt;
                GridView1.DataBind();
                SetViewState(dt);
            }
        }