[求助]IPolygon如何设置颜色？

<P>请问在同一shape文件中如何设置不同颜色的IPolygon？</P>
<P>急！</P>

<P>是指专题图吗？用单一符号专题图示例：</P>
<P>//新建填充符合</P>
<P>ISimpleFillSymbol pSimpleFillSyl=new SimpleFillSymbol();</P>
<P>//设置填充符合的颜色样式等属性</P>
<P>...</P>
<P>//新建一个SimpleRenderer</P>
<P><EM>I</EM>SimpleRenderer pSimpleRenderer=new SimpleRenderer();</P>
<P>pSimpleRenderer.Symbol=pSimpleFillSyl;</P>
<P>//获取图层</P>
<P>IGeoFeatureLayer pGeoFeatureLayer=new GeoFeatureLayer();</P>
<P>pGeoFeatureLayer=AxMapControl.Map.Layer(0);</P>
<P>pGeoFeatureLayer.Render=pSimpleRenderer;</P>
<P>//刷新</P>
<P>AxMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography,Nothing,Nothing);</P>

<P>谢谢，但是我想问的是：在一个shape文件中，不同的IPolygon设置不同的颜色？<BR>            IPoint p = new PointClass();<BR>            object Missing = Type.Missing;<BR>            IPolygon polygon = new PolygonClass();<BR>            //定义一个点的集合</P>
<P>/**/         IPointCollection ptCollect = polygon as IPointCollection;<BR>            //定义一系列要添加到多边形上的点对象，并赋初始值<BR>            p.PutCoords(473701, 3597969);<BR>            ptCollect.AddPoint(p, ref Missing, ref Missing);<BR>            p.PutCoords(473701, 3601969);<BR>            ptCollect.AddPoint(p, ref Missing, ref Missing);<BR>            p.PutCoords(474701, 3601969);<BR>            ptCollect.AddPoint(p, ref Missing, ref Missing);<BR>            p.PutCoords(474701, 3597969);<BR>            ptCollect.AddPoint(p, ref Missing, ref Missing);</P>
<P>            feature.Shape = polygon;<BR>            feature.Store();</P>
<P>在这里polygon如何设置颜色？</P>

2楼的办法会给整个层都变色，不能单独针对某个要素变色

<P>这段代码对面图层有效</P>

<P>  MapMain.ActiveView.Get_FocusMap(pMap);</P>
<P>  //获取图层字段<BR>  pMap.Get_Layer(6,Layer);<BR>  FeatureLayer:=IFeatureLayer(layer);</P>
<P>  //显示选中点<BR>  FeatureLayer.Search(nil,false,featureCursor);<BR>  if featureCursor=nil then begin exit; end;</P>
<P>  pRender:=CoUniqueValueRenderer.Create as IUniqueValueRenderer;<BR>  pRender.Set_FieldCount(1);</P>
<P>  featureCursor.NextFeature(feature);<BR>  feature.Get_Fields(fields);<BR>  fields.Get_Field(0,field);<BR>  field.Get_Name(fname);</P>
<P>  pRender.Set_Field(0,fname);</P>
<P>  while feature<>nil do begin<BR>    //根据不同的数据对要素显示不同的颜色；<BR>    feature.Get_Value(0,value);<BR>    if value>1 then begin<BR>      pColor:=CoRgbColor.create as IColor;<BR>      pColor.Set_RGB(RGB(255,0,0));<BR>    end else begin<BR>      pColor:=CoRgbColor.create as IColor;<BR>      pColor.Set_RGB(RGB(255,255,0));<BR>    end;</P>
<P>    FillSymbol:=CoSimpleFillSymbol.create as ISimpleFillSymbol;<BR>    FillSymbol.Set_Color(pColor);<BR>    pRender.AddValue(value,value,ISymbol(FillSymbol));<BR>    featureCursor.NextFeature(feature);<BR>  end;</P>
<P>  IGeoFeatureLayer(FeatureLayer)._Set_Renderer(pRender as IFeatureRenderer);<BR>  MapMain.Update;<BR>  MapMain.ActiveView.PartialRefresh(esriViewGeography,Layer,nil);</P>