报表统计(九) 访问数据库 Pie图 Ajax交互

public partial class WebForm3 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            CreateChart();
        }
        public void CreateChart()
        {
            Chart1.Width = 400;
            Chart1.Height = 300;
            Chart1.BackColor = Color.Azure;
            Chart1.ChartAreas[0].BackColor = Color.Gray;
            Chart1.Series[0].ChartType = SeriesChartType.Pie;//饼图
            Chart1.Series[0].PostBackValue = "#INDEX";//数据点索引
            Chart1.Series[0].LegendPostBackValue = "#INDEX";//数据点索引
            Chart1.Series[0].LegendToolTip = "#PERCENT";//数据点Y所占百分比
            Chart1.Series[0].ToolTip = "#VALX:\t#VALY";
            int[] intArr = new int[] { 100, 200, 400, 80 };
            string[] strArr = new string[] { "A", "B", "C", "D" };
            Chart1.Series[0].Points.DataBindXY(strArr, intArr);
            Legend l = new Legend();
            Chart1.Legends.Add(l);
            if(!IsPostBack)
                Chart1.Series[0].Points[0].CustomProperties = "Exploded=true";
        }

        protected void Chart1_Click(object sender, ImageMapEventArgs e)
        {
            int index = Convert.ToInt32(e.PostBackValue);
            if (index >= 0 && index < Chart1.Series[0].Points.Count)
            {
                Chart1.Series[0].Points[index].CustomProperties += "Exploded=true";
            }
        }

    }