Call ArcHydro tools using ArcGIS Pro SDK

[AquanuityDevelopment]

I just could not get ArcHydro tool to work using ArcGIS Pro SDK.  The following is a block of my code.  Any hep will be greatly appreciated.

string sIputRaster = @"C:\Support\ESRI_LocalGovernment.gdb\FiveMeterSurface";
string sRaterPath = @"C:\Support\Fill.tif";

var parameters = Geoprocessing.MakeValueArray(sIputRaster, sRaterPath);

var cts = new CancellationTokenSource();
var results = await Geoprocessing.ExecuteToolAsync("Fill", parameters, null, cts.Token,
(eventName, o) =>
{
}, GPExecuteToolFlags.None);
if (results.IsFailed)
{
   MessageBox.Show("Failed to create fill layer. Error " + results.ErrorCode);

return;
}

[GKmieliauskas · Accepted solution]

Hi,

Spatial Analyst has its own way of setting parameters for tools which have return value. They order differs in Python and .NET. Because Fill tool has 2 input parameters and 1 output, so output parameter could be in third place. You need to check it. Set for example 1 for z_limit.

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/fill.htm 

Another one thing I am not sure about geoprocessing tool name. It could be named like "Fill_sa" as other spatial analyst tools which I have used. For example "Reclassify_sa", "RasterCalculator_sa". There is no description about that.

Add validation checking to your geoprocessing call like in code below:

string sIputRaster = @"C:\Support\ESRI_LocalGovernment.gdb\FiveMeterSurface";
string sRaterPath = @"C:\Support\Fill.tif";

var parameters = Geoprocessing.MakeValueArray(sIputRaster, 1, sRaterPath);

var cts = new CancellationTokenSource();
var results = await Geoprocessing.ExecuteToolAsync("Fill_sa", parameters, null, cts.Token,
(eventName, o) =>
{
            System.Diagnostics.Debug.WriteLine($@"GP event: {eventName}");
            if (eventName == "OnMessage")
            {
                IGPMessage gpMsg = o as IGPMessage;
                if (gpMsg != null)
                {
                    Logger.Info(gpMsg.Text);
                }
                else
                {
                    Logger.Info($@"{o.ToString()}");
                }
            }
            if (eventName == "OnValidate")
            {
                List<IGPMessage> gpMsgs = (o as IGPMessage[]).ToList();
                if (gpMsgs != null)
                {
                    foreach (var gpMsg in gpMsgs)
                    {
                        if (gpMsg.ErrorCode == 0)
                        {
                            continue;
                        }

                        // Fill with your logging
                    }
                }
                else
                {
                    // Fill with your logging
                }
            }
            if (eventName == "OnProgressMessage")
            {
                // Fill with your logging
            }

}, GPExecuteToolFlags.None);
if (results.IsFailed)
{
   MessageBox.Show("Failed to create fill layer. Error " + results.ErrorCode);

return;
}

[AquanuityDevelopment]

Thanks a lot for your help.  I am able to get it work now.  The key is the GP tool name.  It should be "Fill_sa" as you indicated.  But it only takes 2 parameters in Pro SDK though.  It would be better if users can specify z_limit.

[GKmieliauskas]

Try to specify z_limit as third parameter. Sometimes spatial analyst tools inserts output parameter in second or in third position. So if you have found that output parameter is second then z_limit parameter could be third