private void cbJobCode_SelectedIndexChanged(object sender, EventArgs e)
{
string name = cbJobCode.Text;
cbAccount.DisplayMember = "Name";
cbAccount.ValueMember = "ID";
cbAccount.DataSource = clientName.GetClientNameWithJobCode(name);
dt.Clear();
dt = endDate.GetEndDateWithJobCode(name);
deadline = endDate.ConvertDataTableToString(dt);
txtDeadline.Text = deadline;
}