使用ArcEngine修改柵格數據的像素值時，要調用IRasterEdit接口的刷新方法，并用C#回收資源，否則像素值可能無法保存成功，出現像素值為零的情況。相關代碼如下：

//Create a raster from the dataset. IRaster raster = rasterDataset.CreateFullRaster(); //Create a pixel block using the weight and height of the raster dataset. //If the raster dataset is large, a smaller pixel block should be used. //Refer to the topic "How to access pixel data using a raster cursor". IPnt blocksize = new PntClass(); blocksize.SetCoords(width, height); IPixelBlock3 pixelblock = raster.CreatePixelBlock(blocksize) as IPixelBlock3; //Populate some pixel values to the pixel block. System.Array pixels; pixels = (System.Array)pixelblock.get_PixelData(0); m_pSeismicIntensityModel.SetPixelBlock(EQCenter.X, EQCenter.Y, magnitude, EQSrcDepth, pLowerLeft.X, pLowerLeft.Y, width, height, xCell, yCell, ref pixels); pixelblock.set_PixelData(0, (System.Array)pixels); //Define the location that the upper left corner of the pixel block is to write. IPnt upperLeft = new PntClass(); upperLeft.SetCoords(0, 0); //Write the pixel block. IRasterEdit rasterEdit = (IRasterEdit)raster; rasterEdit.Write(upperLeft, (IPixelBlock)pixelblock); rasterEdit.Refresh(); GC.Collect(); //Release rasterEdit explicitly. System.Runtime.InteropServices.Marshal.ReleaseComObject(rasterEdit);

轉載于:https://www.cnblogs.com/qb371/archive/2011/08/15/2366316.html

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