C# 利用IRawPixels接口遍历栅格数据

ao的版本为10.2，开发的语言是c#。栅格数据来源irasterdataset接口。

irasterbandcollection prasterbandcollection = prasterdataset as irasterbandcollection;
irasterband prasterband = prasterbandcollection.item(0);
 iraster praster = (prasterdataset as irasterdataset2).createfullraster();
irawpixels prawpixels = prasterband as irawpixels;
irasterprops prasterprops = prasterband as irasterprops;
int dheight = prasterprops.height;
int dwidth = prasterprops.width; 
ipnt pntsize = new pntclass();
pntsize.setcoords(dheight, dwidth);
ipnt ppixelblockorigin = new pntclass();
ppixelblockorigin.setcoords(0, 0);
ipixelblock pixelblock = praster.createpixelblock(pntsize);
prawpixels.read(ppixelblockorigin, pixelblock);
system.array arr = (system.array)(pixelblock as ipixelblock3).get_pixeldata(0);
for (int i = 0; i < dheight;i++ ) 
{
 for (int j = 0; j < dwidth; j++) 
 {
   float number = 0;
   float.tryparse(arr.getvalue(i,j).tostring(),out number);     
  }
}

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