Using InMemory FeatureClasses for geoprocessing

Question

Hello,

I have been struggling with using InMemory FeatureClasses in a geoprocessing. Not exactly sure how to set the in_features and out_feature_class to use InMemory feature classes. Everything I have tried has resulted in an 
Failed to execute. Parameters are not valid.
ERROR 000732: Input Features: Dataset Addresses does not exist or is not supported
ERROR 000840: The value is not a Feature Class.

Has anyone actually sucessfully using InMemery feature classs as input and output for geoprocessing in C#?

ScottDickison · Answer

Thanks for the responses. Sorry for not being clear. I can write to a shape file with no problem. I want to write the results to in_memory featureclass like you can do when manualy calling the geoprocessing.

Geoprocessor gp = new Geoprocessor();
            CopyFeatures copyFeatLay = new CopyFeatures();
            copyFeatLay.in_features = featureClass;
            copyFeatLay.out_feature_class = "In_Memory\Test";// or  "Myworkspace\Test"
            gp.Execute(copyFeatLay, null);

Were you able to figure out how this was done? I'm attempting to do something similar.

PeterPowell · Answer

Thanks for the responses. Sorry for not being clear. I can write to a shape file with no problem. I want to write the results to in_memory featureclass like you can do when manualy calling the geoprocessing.

Geoprocessor gp = new Geoprocessor();
            CopyFeatures copyFeatLay = new CopyFeatures();
            copyFeatLay.in_features = featureClass;
            copyFeatLay.out_feature_class = "In_Memory\Test";// or  "Myworkspace\Test"
            gp.Execute(copyFeatLay, null);

JohnHauck · Answer

The following worked for me without error:            UID CLSID = null;
            String featureClassName = "TestFC";

//create and open in memory workspace
            IWorkspaceFactory WF = new InMemoryWorkspaceFactoryClass();
            IName name = WF.Create("", "MyWorkspace", null, 0) as IName;
            IWorkspace inMemWorkspace = (IWorkspace)name.Open();
            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)inMemWorkspace;

// assign the class id value if not assigned
            if (CLSID == null)
            {
                CLSID = new UIDClass();
                CLSID.Value = "esriGeoDatabase.Feature";
            }

IObjectClassDescription objectClassDescription = new FeatureClassDescriptionClass();

// create the fields using the required fields method
            IFields fields = objectClassDescription.RequiredFields;
            IFieldsEdit fieldsEdit = (IFieldsEdit)fields;
            IField field = new FieldClass();

// create a user defined text field
            IFieldEdit fieldEdit = (IFieldEdit)field;

// setup field properties
            fieldEdit.Name_2 = "SampleField";
            fieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
            fieldEdit.IsNullable_2 = true;
            fieldEdit.AliasName_2 = "Sample Field Column";
            fieldEdit.DefaultValue_2 = "test";
            fieldEdit.Editable_2 = true;
            fieldEdit.Length_2 = 100;

// add field to field collection
            fieldsEdit.AddField(field);
            fields = (IFields)fieldsEdit;

String strShapeField = "";

// locate the shape field
            for (int j = 0; j < fields.FieldCount; j++)
            {
                if (fields.get_Field(j).Type == esriFieldType.esriFieldTypeGeometry)
                {
                    strShapeField = fields.get_Field(j).Name;
                }
            }

//create feature class in memory workspace
            IFeatureClass featureClass = featureWorkspace.CreateFeatureClass(featureClassName, fields, CLSID, null, esriFeatureType.esriFTSimple, strShapeField, null);

//copy the feature class to disk to verify process
            Geoprocessor gp = new Geoprocessor();
            CopyFeatures copyFeatLay = new CopyFeatures();
            copyFeatLay.in_features = featureClass;
            copyFeatLay.out_feature_class = @C:	emp	est1.shp;
            gp.Execute(copyFeatLay, null);