private void button1_Click(object sender, EventArgs e)
{
AddContractor ac = new AddContractor(0);
ac.ShowDialog();
LoadData();
}
private void btnEdit_Click(object sender, EventArgs e)
{
AddContractor ae = new AddContractor(Convert.ToInt32(this.dgvContractor.CurrentRow.Cells[0].Value));
ae.ShowDialog();
LoadData();
}