private void thêmToolStripMenuItem_Click(object sender, EventArgs e)
{
dtgv.CurrentCell = dtgv.Rows[0].Cells[0];
int id = 0;
string tenban = null;
string status = null;
for (int i = 0; i < dtgv.RowCount - 1; i++)
{
id = Int32.Parse(dtgv.Rows[i].Cells[0].Value.ToString());
tenban = dtgv.Rows[i].Cells[1].Value.ToString();
status = dtgv.Rows[i].Cells[2].Value.ToString();
webservice.updateData(id, tenban, status);
}
MessageBox.Show("Update success");
loadData();
}