环形图（中空的饼状图）

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饼状图使用dev插件

1. 代码

 #region 饼图
            chartControl2.Series.Clear();
	    //ViewType.Doughnut 定义为环状图
            Series srpie = new Series("Series 1", ViewType.Doughnut);
            srpie.LegendPointOptions.PointView = PointView.Argument;
            chartControl2.Series.Add(srpie);
            srpie.PointOptions.ValueNumericOptions.Format = NumericFormat.Percent;//百分比显示

             DataSet dsBzB = m_logic.GetAllBz();
             foreach (DataRow drdsBz in dsBzB.Tables[0].Rows)
             {
                 string strbz = drdsBz["bz"].ToString();
                 //月完工数
                 int GetYwgs = m_logic.GetYwgs(strYearMonth, strbz);
                 string strGetYwgs = GetYwgs.ToString();
                 if (GetYwgs > 0)
                 {
                     chartControl2.Series["Series 1"].Points.Add(new SeriesPoint(strbz, decimal.Parse(strGetYwgs)));
                 }
             }
            #endregion

2. 图片