获取指定坐标处的栅格单元格的值

private double getRasterCellValue(IPoint pPoint, IRasterLayer pRasterLayer)

        {

            IIdentify pIdentify = (IIdentify)pRasterLayer;

            IArray pArray = pIdentify.Identify(pPoint);

            IRasterIdentifyObj2 pRasterIdentify2 = (IRasterIdentifyObj2)pArray.get_Element(0);

            //IRasterIdentifyObj pRasterIdentify = (IRasterIdentifyObj)pArray.get_Element(0);

            string pField = "";

            string pValue = "";

            //pField = pRasterIdentify.Name;

            if (pField == "NoData")

                return 0; 

            int pIdentifyIndex = 0;

            while (true)

            {

                try

                {

                    pRasterIdentify2.GetPropAndValues(pIdentifyIndex, out pField, out pValue);

                }

                catch

                {

                    break;

                }

                pIdentifyIndex = pIdentifyIndex + 1;

            }

            return Convert.ToDouble(pValue);

        }

 

 

　　　　

private double[] getRasterCellValue(IPoint pPoint, IGroupLayer pGroupLayer)

{

IIdentify pIdentify = (IIdentify)pGroupLayer;

     IArray pArray = pIdentify.Identify(pPoint);

         

     double[] RasterCellValue = new double[pArray.Count];

 

     for (int i = 0; i < pArray.Count; i++)

     {

     IRasterIdentifyObj2 pRasterIdentify2 = (IRasterIdentifyObj2)pArray.get_Element(i);

          IRasterIdentifyObj pRasterIdentify = (IRasterIdentifyObj)pArray.get_Element(i);

          string pField = "";

          string pValue = "";

          pField = pRasterIdentify.Name;

          if (pField == "NoData")

          return RasterCellValue;

          int pIdentifyIndex = 0;

          while (true)

          {

              try

              {

                   pRasterIdentify2.GetPropAndValues(pIdentifyIndex, out pField, out pValue);

              }

              catch

              {

                   break;

              }

              if (pField == "Pixel value" && pValue != "")

                   RasterCellValue[i] = Convert.ToDouble(pValue);  

              pIdentifyIndex = pIdentifyIndex + 1;

           }

   }

return RasterCellValue;

}