Trying to do a MakeFeaturelayer followed by a Clip

MarioLandry2

I've built a method that does create a FeatureLayer (temp_layer).  And once that FeatureLayer is created, it is used in a clip operation.

But the clipping part does not work because it cannot recognize the featurelayer (temp_layer).

It's probably linked to the async process.

Anybody has a suggestion about that problem?

Here's the piece a code that does what I've said:

/// <summary>
/// Execute the MakeFeatureLayer Tool in the ArcMap Toolbox.
/// Followed by a clip on that featurelayer.
/// </summary>
/// <returns></returns>
/// <remarks></remarks>
public static async Task<bool> ExecuteMakeFeatureLayerAndClipAsync(string _inputFeatures,
string _outputLayer,
string _clipFClassPath,
string _whereClause = "",
string _workSpace = "",
string _field_Info = "")
{
var environments = Geoprocessing.MakeEnvironmentArray(overwriteoutput: true);

List<object> arguments = new()
{
_inputFeatures,
"temp_layer",
_whereClause,
_workSpace,
_field_Info
};

IGPResult result = await Geoprocessing.ExecuteToolAsync("management.MakeFeatureLayer", Geoprocessing.MakeValueArray(arguments.ToArray()), environments, null, null, GPExecuteToolFlags.None);
if (result.IsFailed)
{
Geoprocessing.ShowMessageBox(result.Messages, "GP Messages", GPMessageBoxStyle.Error);
}

arguments = new()
{
"temp_layer",
_clipFClassPath,
_outputLayer,
""
};

result = await Geoprocessing.ExecuteToolAsync("analysis.Clip", Geoprocessing.MakeValueArray(arguments.ToArray()), environments, null, null, GPExecuteToolFlags.None);
if (result.IsFailed)
{
Geoprocessing.ShowMessageBox(result.Messages, "GP Messages", GPMessageBoxStyle.Error);
}

return !result.IsFailed;
}

kenbuja

What I've done when using the result of one GeoProcessing tool in another tool is to get the FeatureClass of the result as an input to the second tool. This is using a geodatabase where everything will be stored. Here's an example:

 

IGPResult result = await Geoprocessing.ExecuteToolAsync("management.MakeFeatureLayer", Geoprocessing.MakeValueArray(arguments.ToArray()), environments, null, null, GPExecuteToolFlags.None);
if (result.IsFailed)
{
  Geoprocessing.ShowMessageBox(result.Messages, "GP Messages", GPMessageBoxStyle.Error);
  return;  //Exit if the first step fails
}
using (FeatureClass tempFC = geodatabase.OpenDataset<FeatureClass>("temp_layer"))
{
  arguments = new()
  {
    tempFC,
    _clipFClassPath,
    _outputLayer,
    ""
  };

  result = await Geoprocessing.ExecuteToolAsync("analysis.Clip", Geoprocessing.MakeValueArray(arguments.ToArray()), environments, null, null, GPExecuteToolFlags.None);
  if (result.IsFailed)
  {
    Geoprocessing.ShowMessageBox(result.Messages, "GP Messages", GPMessageBoxStyle.Error);
  }

  return !result.IsFailed;
}