private void btnDel_Click(object sender, EventArgs e) { if (this.dataGridView1.SelectedRows.Count > 0) { var brand = this.dataGridView1.SelectedRows[0].Tag as CityModel; var deleteResponse = WebRequestUtil.DeleteCity(brand.CityId); if (deleteResponse != null) { bool res = JsonUtil.Deserialize <QSWResponse <bool> >(deleteResponse.Content).Data; if (res) { this.dataGridView1.Rows.Remove(this.dataGridView1.SelectedRows[0]); } } } }