private void ThongkeKH_Load(object sender, EventArgs e)
{
tkBLL.CapNhatLoai();
label1.Text = "/" + testkh.Descendants("khachhang").Count().ToString();
DataSet ds = new DataSet();
ds.ReadXml("..\\..\\Data\\thongkeloai.xml");
chartLoaiKH.Series["LoaiKH"].XValueMember = "ten";
chartLoaiKH.Series["LoaiKH"].YValueMembers = "soluong";
chartLoaiKH.DataSource = ds;
chartLoaiKH.DataBind();
chartLoaiKH.Series[0].IsValueShownAsLabel = true;
chartLoaiKH.Series[0].Label = "#PERCENT";
chartLoaiKH.Series[0].LegendText = "#AXISLABEL";
this.chartLoaiKH.Legends.Add("Legend1");
this.chartLoaiKH.Legends[0].Enabled = true;
this.chartLoaiKH.Legends[0].Docking = Docking.Bottom;
this.chartLoaiKH.Legends[0].Alignment = System.Drawing.StringAlignment.Center;
this.chartLoaiKH.Series[0].LegendText = "#VALX (#PERCENT)";
}