public void LoadData()
{
if (ds != null)
{
ds.Clear();
dscv.Clear();
}
dscv = chucVuBLL.getListChucVu();
tbChucVu.DataSource = dscv.Tables[0];
tbChucVu.DisplayMember = "tenChucVu";
tbChucVu.ValueMember = "chucVuID";
ds = nguoiDungBLL.ListUser();
datagridNguyenLieu.DataSource = ds.Tables[0];
// binding
txtTaiKhoan.Enabled = false;
XoaText();
txtTaiKhoan.DataBindings.Clear();
txtHoTen.DataBindings.Clear();
txtDanToc.DataBindings.Clear();
txtDienThoai.DataBindings.Clear();
txtNoiO.DataBindings.Clear();
tbChucVu.DataBindings.Clear();
tbGioiTinh.DataBindings.Clear();
dtpNgaySinh.DataBindings.Clear();
dtpNgayVaoLam.DataBindings.Clear();
txtPassword.DataBindings.Clear();
nudLuongGio.DataBindings.Clear();
txtTaiKhoan.DataBindings.Add("Text", ds.Tables[0], "taiKhoan");
txtHoTen.DataBindings.Add("Text", ds.Tables[0], "hoTen");
txtDanToc.DataBindings.Add("Text", ds.Tables[0], "danToc");
txtDienThoai.DataBindings.Add("Text", ds.Tables[0], "dienThoai");
txtNoiO.DataBindings.Add("Text", ds.Tables[0], "noiO");
tbChucVu.DataBindings.Add("SelectedValue", ds.Tables[0], "chucVuID");
tbGioiTinh.DataBindings.Add("Text", ds.Tables[0], "gioiTinh");
dtpNgaySinh.DataBindings.Add("Text", ds.Tables[0], "ngaySinh");
dtpNgayVaoLam.DataBindings.Add("Text", ds.Tables[0], "ngayBatDau");
txtPassword.DataBindings.Add("Text", ds.Tables[0], "matKhau");
nudLuongGio.DataBindings.Add("Text", ds.Tables[0], "luongGioHT");
}