WHY no result was returned when using project raster geoprocessor in ArcEngine?

Discussion created by timiao on Jan 18, 2011
Latest reply on Jan 22, 2011 by timiao
Hi there,

I can use Project Raster in arctoolbox to project a raster data correctly and one result raster image file was returned. The related parameters are showed in the following picture.

BUT, I program C# in VS2008 using the same parameters as the above. And, try to run it. There is no error information and  no result returned! I am puzzled! The details is as followed
       private void button1_Click(object sender, EventArgs e)

            //output projected CS
            ISpatialReferenceFactory2 pSpatRefFact = new SpatialReferenceEnvironmentClass();
            int proCS_Type = (int)esriSRProjCSType.esriSRProjCS_World_Mercator;
            IProjectedCoordinateSystem pOutProCS = pSpatRefFact.CreateProjectedCoordinateSystem(proCS_Type);
            ISpatialReference pOutSRprj = pOutProCS as ISpatialReference;

            Geoprocessor igp = new ESRI.ArcGIS.Geoprocessor.Geoprocessor();
            ProjectRaster proR = new ProjectRaster();

            //construct processor            
            proR.out_coor_system = pOutSRprj;// "World_Mercator";
            proR.in_raster = @"E:\TestData\gisrs\projection\gcs_long_dem.img";
            proR.out_raster = @"E:\TestData\gisrs\projection\out2.img";
            proR.cell_size = 16.6;
            proR.resampling_type = "NEAREST";

            //execute the tool
            RunTool(igp, proR, null);            

        // Function for returning the tool messages.
        private void ReturnMessages(Geoprocessor gp)
            string ms = "";
            if (gp.MessageCount > 0)
                for (int Count = 0; Count <= gp.MessageCount - 1; Count++)
                    ms += gp.GetMessage(Count);
        private void RunTool(Geoprocessor geoprocessor, IGPProcess process, ITrackCancel TC)
            // Set the overwrite output option to true
            geoprocessor.OverwriteOutput = true;
            geoprocessor.AddOutputsToMap = true;
                //  geoprocessor.Execute(
                geoprocessor.Execute(process, null);
            catch (Exception err)


My operation system is WIN7, and the version of arcengine is 9.3. Any reply will be appreciated! Thank you so much!