protected void Page_Load(object sender, EventArgs e)
{
HinhVuong hv = new HinhVuong {
Canh = 5
};
HinhChuNhat hcn = new HinhChuNhat {
ChieuDai = 10, ChieuRong = 20
};
IHinh h;
//h = hv;
//double dt1 = h.DienTich();
//h = hcn;
//double dt2 = h.DienTich();
h = hv as IHinh;
h = (IHinh)hv;
IHoSoCaNhan hscn;
hscn = hv as IHoSoCaNhan;
hscn = (IHoSoCaNhan)hv;
}
private void btnTinh_Click(object sender, EventArgs e)
{
try
{
double canhA = double.Parse(txtCanhA.Text);
HinhVuong hv = new HinhVuong();
hv.CanhA = canhA;
lblChuVi.Text =
String.Format("Chu Vi: {0}", hv.ChuVi());
lblDienTich.Text =
String.Format("Diện Tích: {0}", hv.DienTich());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
