IObjectLoader2 Interface

// This example loads only the states of California and Oregon.
public void loadObjects(String output, String input, String outputFeatureClassName, String inputFeatureClassName)
{
    //Set up the output feature classes, i.e. the destination
    IWorkspaceFactory outputWorkspaceFactory=new AccessWorkspaceFactoryClass();

    IFeatureWorkspace outputFeatureWorkspace=outputWorkspaceFactory.OpenFromFile(output, 0) as IFeatureWorkspace;
    IFeatureClass outputFeatureClass=outputFeatureWorkspace.OpenFeatureClass(outputFeatureClassName);
    // Set up the input feature classe, i.e. the data source
    IWorkspaceFactory inFeatureWorkspaceFactory=new AccessWorkspaceFactoryClass();
    IFeatureWorkspace inFeatureWorkspace=inFeatureWorkspaceFactory.OpenFromFile(input, 0) as IFeatureWorkspace;
    IFeatureClass inFeatureClass=inFeatureWorkspace.OpenFeatureClass(inputFeatureClassName);
    // Specify a subset of the input data
    IQueryFilter queryFilter=new QueryFilterClass();
    queryFilter.SubFields="SHAPE,STATE_NAME,STATE_FIPS,AREA";
    queryFilter.WhereClause="STATE_NAME='California' OR STATE_NAME='Oregon'";

    //OutputFields parameter needs to match sub-fields in input queryfilter
    IFields allFields=outputFeatureClass.Fields;
    IFields outFields=new FieldsClass();
    IFieldsEdit outFieldsEdit=outFields as IFieldsEdit;
    // Get the query filter sub-fields as an array
    // and loop through each field in turn,
    // adding it to the ouput fields
    String[] subFields=(queryFilter.SubFields).Split(',');
    for(int j=0; j < subFields.Length; j++)
    {
        int fieldID=allFields.FindField(subFields[j]);
        if(fieldID == -1)
        {
            System.Windows.Forms.MessageBox.Show("field not found: " +  subFields[j]);
            return;
        }
        outFieldsEdit.AddField(allFields.get_Field(fieldID));
    }

    IObjectLoader objectLoader=new ObjectLoaderClass();
    IEnumInvalidObject invalidObjectEnum;
    objectLoader.LoadObjects(
        null,
        (ITable)inFeatureClass,
        queryFilter,
        (ITable)outputFeatureClass,
        outFields,
        false,
        0,
        false,
        false,
        10,
        out invalidObjectEnum
    );
       
              
    IInvalidObjectInfo invalidObject=invalidObjectEnum.Next();
    if(invalidObject != null)
    {
        System.Windows.Forms.MessageBox.Show("Some or all features did not load");
    }
}