arcengine栅格渲染（栅格重分类） IRasterClassifyColorRampRenderer

转载自：http://blog.csdn.net/jack5s/article/details/48184819

ArcGIS中常用到栅格数据的颜色渲染，以及相应级别的label的显示

    private void RasterView(IRasterLayer RasterLayer, double BreakPoint1, double BreakPoint2, double BreakPoint3, double BreakPoint4, double BreakPoint5)              {                  IRasterClassifyColorRampRenderer ClassifyColor = new RasterClassifyColorRampRendererClass();                  IRasterRenderer RasterRender = ClassifyColor as IRasterRenderer;                  RasterRender.Raster = RasterLayer.Raster;                  RasterRender.Update();                  //断点设置                  ClassifyColor.ClassCount = 6;                  ClassifyColor.set_Break(0, -1);                  ClassifyColor.set_Break(1, BreakPoint1);                  ClassifyColor.set_Break(2, BreakPoint2);                  ClassifyColor.set_Break(3, BreakPoint3);                  ClassifyColor.set_Break(4, BreakPoint4);                  ClassifyColor.set_Break(5, BreakPoint5);                  ClassifyColor.set_Break(6, 1);                  //各个分类的颜色设置                  IFillSymbol Symbol = new SimpleFillSymbolClass() as IFillSymbol;                  Symbol.Color = SetHSVColor(0, 100, 100);                  ClassifyColor.set_Symbol(0, Symbol as ISymbol);                  Symbol.Color = SetHSVColor(25, 100, 100);                  ClassifyColor.set_Symbol(1, Symbol as ISymbol);                  Symbol.Color = SetHSVColor(0, 50, 100);                  ClassifyColor.set_Symbol(2, Symbol as ISymbol);                  Symbol.Color = SetHSVColor(60, 100, 100);                  ClassifyColor.set_Symbol(3, Symbol as ISymbol);                  Symbol.Color = SetHSVColor(90, 50, 100);                  ClassifyColor.set_Symbol(4, Symbol as ISymbol);                  Symbol.Color = SetHSVColor(120, 100, 100);                  ClassifyColor.set_Symbol(5, Symbol as ISymbol);                  RasterLayer.Renderer = RasterRender;                  //label的设置,一定要放在RasterLayer.Renderer = RasterRender这句后面，否则无效                  string str1 = BreakPoint1.ToString();                  string str2 = BreakPoint2.ToString();                  string str3 = BreakPoint3.ToString();                  string str4 = BreakPoint4.ToString(); ;                  string str5 = BreakPoint5.ToString();                  ClassifyColor.set_Label(0, "-1 - " + str1);                  ClassifyColor.set_Label(1, str1 + " - " + str2);                  ClassifyColor.set_Label(2, str2 + " - " + str3);                  ClassifyColor.set_Label(3, str3 + " - " + str4);                  ClassifyColor.set_Label(4, str4 + " - " + str5);                  ClassifyColor.set_Label(5, str5 + " - 1");                  ILayerEffects layereffects = RasterLayer as ILayerEffects;//栅格的半透明显示                  layereffects.Transparency = 50;              }  

总的来说，栅格分类显示总觉得代码十分怪异，一些代码的顺序一定要注意，否则会出很多奇怪的现象，比如出现label小数点后显示出很多0等问题