private void LoadChucVu()
{
cboChucVu.Items.Clear();
var danhSachCV = context.LayDanhSachChucVu();
foreach (var cv in danhSachCV)
{
cboCVitem item = new cboCVitem();
item.MaCV = cv.machucvu.ToString().Trim();
item.TenCV = cv.tenchucvu.ToString().Trim();
item.TenCV = cv.machucvu.ToString().Trim();
cboChucVu.Items.Add(item);
cboTenChucVu.Items.Add(cv.tenchucvu.ToString().Trim());
}
}