用devexpress控件通过C#编程绘制饼状图

Question

我把绘制折线图的方法直接运用到饼状图上，数据直接编在代码里面的那种，但是不能显示每个颜色部分代表什么内容，代码如下：  private void buttonX7_Click(object sender, EventArgs e)
        {
            chartControl3.Series.Clear();
            Series s4 = new Series("收入\百元",ViewType.Pie3D);
            s4.Points.Add(new SeriesPoint("8-4 ", 36));
            s4.Points.Add(new SeriesPoint("8-5 ", 23));
            s4.Points.Add(new SeriesPoint("8-7 ", 12));
            s4.Points.Add(new SeriesPoint("8-8 ", 45));
            s4.Points.Add(new SeriesPoint("8-9 ", 40));
            chartControl3.Series.Add(s4);
        }
怎样修改才会把颜色部分加上标签说明？急求啊！

Answer 1

Series series = new Series("离群原因", ViewType.Pie3D);
            SeriesPoint point;
            DataTable dt = bll.GetPigLeaveGroupByLeaveReason(filter);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                point = new SeriesPoint(dt.Rows[i]["FName"].ToString(), Convert.ToDouble(dt.Rows[i]["FValue"].ToString()));
                series.Points.Add(point);
            }            series.LegendPointOptions.PointView = PointView.ArgumentAndValues;
            series.Label.Font = new Font("宋体", 8);
            series.Label.LineLength = 50;
            this.chartControl1.Series.Add(series);

Answer 2

 Datatable中的两列分别是FName 和　FValue

Answer 3

private void chartControl1_CustomDrawSeriesPoint(object sender, CustomDrawSeriesPointEventArgs e)
        {
            string str = e.SeriesPoint.Argument;
            if (str.Trim()== "8-4")
            {
                e.LabelText = "8-4的说明：xxxxxx";
            }
        }还可以设置 这个饼图的标题：
ChartTitle c1 = new ChartTitle();
            c1.Text = "<b>xxx统计图</b>";
            c1.Alignment = StringAlignment.Center;
            c1.Dock = ChartTitleDockStyle.Top;
            c1.Font = new Font("宋体", 14, FontStyle.Bold);
            c1.TextColor = Color.Red;
            chartControl1.Titles.Add(c1);