Get External References (C#)

//----------------------------------------------------------
//  Preconditions:
//  1. Open an assembly or part document.
//  2. Select:
//     * a component in an assembly document.
//       - or -
//     * a feature in an assembly or part document.
//       - or -
//     * Nothing in either type of document.
//
// Postconditions: Examine the Immediate window
// to see the name of the part or assembly document
// and the external references for the selected
// component, feature, or document.
//----------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
using System.Diagnostics;

namespace ListExternalFileReferencesCSharp.csproj
{

    partial class SolidWorksMacro
    {


        public void Main()
        {
            ModelDoc2 swModel = default(ModelDoc2);
            ModelDocExtension swModDocExt = default(ModelDocExtension);
            SelectionMgr swSelMgr = default(SelectionMgr);
            Feature swFeat = default(Feature);
            Component2 swComp = default(Component2);
            object vModelPathName = null;
            object vComponentPathName = null;
            object vFeature = null;
            object vDataType = null;
            object vStatus = null;
            object vRefEntity = null;
            object vFeatComp = null;
            int nConfigOpt = 0;
            string sConfigName = null;
            int nRefCount = 0;
            int nSelType = 0;
            int i = 0;

            swModel = (ModelDoc2)swApp.ActiveDoc;
            swSelMgr = (SelectionMgr)swModel.SelectionManager;

            swModDocExt = (ModelDocExtension)swModel.Extension;
            nSelType = swSelMgr.GetSelectedObjectType3(1, -1);

            switch (nSelType)
            {

                // Selected component in an assembly document
                case (int)swSelectType_e.swSelCOMPONENTS:
                    swComp = (Component2)swSelMgr.GetSelectedObjectsComponent3(1, -1);
                    nRefCount = swComp.ListExternalFileReferencesCount();
                    swComp.ListExternalFileReferences2(out vModelPathName, out vComponentPathName, out vFeature, out vDataType, out vStatus, out vRefEntity, out vFeatComp, out nConfigOpt, out sConfigName);

                    swModel = (ModelDoc2)swComp.GetModelDoc2();

                    break;
                // Selected feature in a part or assembly document
                case (int)swSelectType_e.swSelBODYFEATURES:
                case (int)swSelectType_e.swSelSKETCHES:
                    swFeat = (Feature)swSelMgr.GetSelectedObject6(1, -1);
                    nRefCount = swFeat.ListExternalFileReferencesCount();
                    swFeat.ListExternalFileReferences2(out vModelPathName, out vComponentPathName, out vFeature, out vDataType, out vStatus, out vRefEntity, out vFeatComp, out nConfigOpt, out sConfigName);

                    break;

                // Part document only
                default:
                    nRefCount = swModDocExt.ListExternalFileReferencesCount();
                    swModDocExt.ListExternalFileReferences(out vModelPathName, out vComponentPathName, out vFeature, out vDataType, out vStatus, out vRefEntity, out vFeatComp, out nConfigOpt, out sConfigName);

                    break;
            }

            Debug.Print("Model name = " + swModel.GetPathName());
            Debug.Print("    Reference count        = " + System.Convert.ToString(nRefCount));

            if (nRefCount >= 1)
            {
                object[] ModelPathName = new object[nRefCount - 1];
                object[] ComponentPathName = new object[nRefCount - 1];
                object[] Feature = new object[nRefCount - 1];
                object[] DataType = new object[nRefCount - 1];
                int[] Status = new int[nRefCount - 1];
                object[] RefEntity = new object[nRefCount - 1];
                object[] FeatComp = new object[nRefCount - 1];

                ModelPathName = (object[])vModelPathName;
                ComponentPathName = (object[])vComponentPathName;
                Feature = (object[])vFeature;
                DataType = (object[])vDataType;
                Status = (int[])vStatus;
                RefEntity = (object[])vRefEntity;
                FeatComp = (object[])vFeatComp;

                Debug.Print("");
                for (i = 0; i <= nRefCount - 1; i++)
                {
                    Debug.Print("    Model path + name      = " + ModelPathName[i]);
                    Debug.Print("    Component path + name  = " + ComponentPathName[i]);
                    Debug.Print("    Feature                = " + Feature[i]);
                    Debug.Print("    Data type              = " + DataType[i]);
                    Debug.Print("    Status                 = " + System.Convert.ToString(Status[i]));
                    Debug.Print("    Reference entity       = " + RefEntity[i]);
                    Debug.Print("    Feature component      = " + FeatComp[i]);
                    Debug.Print("    Config option          = " + nConfigOpt);
                    Debug.Print("    Config name            = " + sConfigName);
                    Debug.Print(" ");
                }
            }
        }



        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>

        public SldWorks swApp;

    }
}