private void DataGridView1_CellClick(object sender, DataGridViewCellEventArgs e) { if (e.RowIndex != -1) { if (e.ColumnIndex == dataGridView1.Columns["recovery"].Index) { string id = dataGridView1.Rows[e.RowIndex].Cells["Mã Số"].Value.ToString(); if (TypeController.Recovery(Convert.ToInt32(id)) == true) { this.DialogResult = DialogResult.OK; } else { MessageBox.Show("Có lỗi xảy ra!!", "", MessageBoxButtons.OK, MessageBoxIcon.Error); } } } }