private void btnLuu_Click(object sender, EventArgs e)
        {
            string email  = this.txtEmail.Text;
            string hoTen  = this.txtTen.Text;
            string sdt    = this.txtPhone.Text;
            string diaChi = this.txtAddress.Text;

            int      id     = 1;
            double   congNo = 0;
            bool     isMan  = this.rdNam.Checked;
            DateTime dob    = this.dtDoB.Value;

            if (email == "" || hoTen == "" || sdt == "")
            {
                MessageBox.Show("Vui lòng điền đầy đủ thông tin!", "Thông Báo!", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            if (this.txtCongNo.Text == "")
            {
                this.txtCongNo.Text = "0";
            }
            try
            {
                id     = Int32.Parse(this.txtID.Text);
                congNo = Double.Parse(this.txtCongNo.Text);
            } catch
            {
                id     = 1;
                congNo = 0;
            }
            Entity_KhachHang _kh = new Entity_KhachHang(id, hoTen, sdt, email, diaChi, dob, isMan, congNo);

            if (kh.insertKhachHang(_kh) == true)
            {
                MessageBox.Show("Thêm thành công khách hàng!", "Thông Báo!", MessageBoxButtons.OK, MessageBoxIcon.Information);
                this.gwKhachHang.DataSource = kh.getData();
            }
            else
            {
                MessageBox.Show("Có lỗi xảy ra, không thể thêm!", "Thông Báo!", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
 public bool insertKhachHang(Entity_KhachHang _kh)
 {
     try
     {
         const string strSQL  = "SP_INSERT_KHACHHANG";
         string[]     pNames  = { "@id", "@ten", "@sdt", "@email", "@diaChi", "@ngaySinh", "@gender", "@congNo" };
         object[]     pValues = { _kh.KhId, _kh.Ten, _kh.Sdt, _kh.Email, _kh.DiaChi, _kh.NgaySinh, _kh.GioiTinh, _kh.CongNo };
         int          count   = con.ExecuteStoredProcedure(strSQL, pNames, pValues);
         if (count >= 0)
         {
             return(true);
         }
         else
         {
             return(false);
         }
     }
     catch
     {
         return(false);
     }
 }
 public bool insertKhachHang(Entity_KhachHang _kh)
 {
     return(kh.insertKhachHang(_kh));
 }