karlsiemsen

Zonal Statistics Error in C# project

Discussion created by karlsiemsen on Sep 6, 2011
Latest reply on Aug 24, 2012 by mgambone2
I'm trying to call the geoprocessor from arcengine in c# code and I keep getting an error. I've used simple file and folder names, and the process works fine in ArcMap, but fails in arcengine. Here is the error message from the geoprocessor:

Zonal statistics program failed
Executing: ZonalStatisticsAsTable C:\testnes\subs.shp AREA_NAME C:\testnes\nonesurr C:\fortis\table6.dbf DATA
Start Time: Tue Sep 06 09:25:46 2011
An error was encountered while executing ZonalStatisticsAsTable.
("esriGeoAnalyst.GridEngine") Zonal statistics program failed
Error in executing grid expression
Failed to execute (ZonalStatisticsAsTable).
End Time: Tue Sep 06 09:25:51 2011 (Elapsed Time: 5.00 seconds)

And here is the source code:

GPHelper.GPZonalStats(@"C:\testnes\subs.shp", @"C:\testnes\nonesurr", "AREA_NAME", @"C:\fortis\table6.dbf");

GPHelper class functions:

public static bool GPZonalStats(string strZoneRaster, string strValueRaster, string strZoneField, string strTable)
        {
            Geoprocessor pGP = new Geoprocessor();

            ZonalStatisticsAsTable zonalStats = new ZonalStatisticsAsTable();
            zonalStats.in_zone_data = strZoneRaster;
            zonalStats.in_value_raster = strValueRaster;
            zonalStats.zone_field = strZoneField;
            zonalStats.out_table = strTable;

            return RunGP(pGP, zonalStats, null);
        }

public static bool RunGP(Geoprocessor geoprocessor, IGPProcess process, ITrackCancel TC)
        {
            // Set the overwrite output option to true
            //Debug.WriteLine(Convert.ToString(geoprocessor.GetEnvironmentValue("Workspace")));
            geoprocessor.OverwriteOutput = true;

            // Execute the tool           
            try
            {
                geoprocessor.Execute(process, null);
                return ReturnMessages(geoprocessor);

            }
            catch (Exception err)
            {
                Console.WriteLine(err.Message);
                return ReturnMessages(geoprocessor);
            }
        }

// Function for returning the tool messages.
        private static bool ReturnMessages(Geoprocessor gp)
        {
            if (gp.MessageCount > 0)
            {
                string allMessages = null;
                for (int Count = 0; Count <= gp.MessageCount - 1; Count++)
                {
                    Console.WriteLine(gp.GetMessage(Count));
                    allMessages += gp.GetMessage(Count);
                }
                if (allMessages.Contains("successfully"))
                {
                    return true;
                }
                else return false;
            }
            else return false;


        }

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