private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
int HoadonID = int.Parse(dataGridView1.CurrentRow.Cells["HoadonbanthuocID"].Value.ToString());
int KhachhangID = int.Parse(dataGridView1.CurrentRow.Cells["KhachhangID"].Value.ToString());
Khachhang kh = APIs.GetKhachhangByID(KhachhangID);
txtTenKH.Text = kh.Tenkhachhang;
txtDiachi.Text = kh.Diachi;
List <CTHoadonbanthuoc> lst = APIs.LstCTByHoadonID(HoadonID);
listView1.Items.Clear();
float total = 0;
for (int i = 0; i < lst.Count; i++)
{
CTHoadonbanthuoc ct = lst[i];
ListViewItem item = new ListViewItem();
item.Text = (i + 1).ToString();
Thuoc t = APIs.GetThuocByID(ct.Thuoc)[0];
item.SubItems.Add(t.Tenthuoc);
item.SubItems.Add(t.Donvitinh);
item.SubItems.Add(ct.Soluong.ToString());
item.SubItems.Add((ct.Dongia * 1000).ToString());
total += (float)ct.Soluong * (float)ct.Dongia * 1000;
item.SubItems.Add((ct.Soluong * ct.Dongia * 1000).ToString());
listView1.Items.Add(item);
}
txtTotal.Text = total.ToString();
}
