饼图渲染专题图__GIS动力站_ArcGIS|开源|虚拟地理环境|算法|工程|信息空间化|WebGIS

private void button1_Click(object sender, EventArgs e)
      {
         try
         {
            pFeatLayer = (IFeatureLayer)axMapControl1.get_Layer(0);
            pGeoFeatureLayer = (IGeoFeatureLayer)pFeatLayer;
            IFeatureClass pFeatureClass = pFeatLayer.FeatureClass;

            ArrayList p_Fields = new ArrayList();
            p_Fields.Add(pFeatureClass.Fields.get_Field(4).AliasName.ToString());
            p_Fields.Add(pFeatureClass.Fields.get_Field(5).AliasName.ToString());

            ArrayList p_Symbols = new ArrayList();
            IFillSymbol pFillSymbol = new SimpleFillSymbolClass();
            pFillSymbol.Color = GetRGBColor(100, 100, 100);
            p_Symbols.Add(pFillSymbol);

            IFillSymbol mFillSymbol = new SimpleFillSymbolClass();
            mFillSymbol.Color = GetRGBColor(140, 100, 150);
            p_Symbols.Add(mFillSymbol);

            pGeoFeatureLayer.Renderer = (IFeatureRenderer)CreatePieChartRender(p_Fields, p_Symbols);

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