Arcengine the raster image to a hierarchical rendering

Arcengine is a handy way to style vector data, and the same can be styled for raster images. Has not been contacted before, today just need to make a raster image rendering. The following ideas are implemented: 1. Defines a series of interfaces for rendering 2. Determines whether the image has a histogram, and if not, creates it. 3. Define the color sequence to render the rendering scheme. 4. Invoke the Render method for rendering. Here is the code: there are two methods, one is to load raster data, one is to render, and then call the method in the event to achieve image rendering. Grid classification Thematic map//////grid layer public static void Funcolorforraster_classify (Irasterlayer PR Asterlayer) {Irasterclassifycolorramprenderer prclassrend = new Rasterclassifycolorramprenderer () as             Irasterclassifycolorramprenderer; Irasterrenderer prrend = prclassrend as Irasterrenderer;
            iraster pRaster = PRasterLayer.Raster;             irasterbandcollection PRBandCol = PRaster As Irasterbandcollection;             irasterband PRBand = pRBandCol.Item (0);             if (Prband.histogram = = null)              {                 prband.computestatsandhist ();             }              prrend.raster = Praster;             prclassrend.classcount = 10;           &nBsp; prrend.update ();
Irgbcolor Pfromcolor = new RGBColor () as Irgbcolor;             pfromcolor.red = 255;             Pfromcolor.green = 0;             Pfromcolor.blue = 0;             Irgbcolor Ptocolor = new RGBColor () as Irgbcolor;             ptocolor.red = 0;             Ptocolor.green = 0; Ptocolor.blue = 255;
Ialgorithmiccolorramp Colorramp = new Algorithmiccolorramp () as Ialgorithmiccolorramp;             Colorramp.size = 10;             Colorramp.fromcolor = Pfromcolor;                       Colorramp.tocolor = Ptocolor; BOOL Createcolorramp;
Colorramp.createramp (out Createcolorramp);
            ifillsymbol FillSymbol = new Simplefillsymbol () as Ifillsymbol;             for (int i = 0; i < PRClassRend.ClassCount ; i++)             {                 fillsymbol.color = ColorRamp.get_Color (i);                  Prclassrend.set_symbol (i, fillsymbol as Isymbol);                  Prclassrend.set_label (i, Prclassrend.get_break (i). ToString ("0.00"));             }              prasterlayer.renderer = Prrend;       &NBSP;&NBSP}                  // /        ///Open Remote sensing image         ///         ///Image's Address         /// Irasterlayer         private irasterlayer OpenImage (String imagePath)         {             string ws = Path.getdirectoryname (ImagePath);             string FBS = Path.GetFileName (ImagePath);
            iworkspacefactory pWork = new Rasterworkspacefactory ();             irasterworkspace PRasterWs = Pwork.openfromfile (ws,0) as Irasterworkspace;             irasterdataset PRasterDataset = Prasterws.openrasterdataset (FBS);                           irasterlayer Prasterlayer = new Rasterlayer () as Irasterlayer;             prasterlayer.createfromdataset ( Prasterdataset);             return PRasterLayer;                     &NBSP} event Logic: AxMapControl1.Map.AddLayer (openimage (filePath)); AxMapControl1.ActiveView.Refresh (); Funcolorforraster_classify (Axmapcontrol1.get_layer (0) as Irasterlayer);//only one Rasterlayer AxMapControl1.Activeview.Refresh (); Here is the renderings before and after the rendering:


Hope to help you.