Save Drawing as DXF Example (C#)

//----------------------------------------------------------------------------
// Preconditions:
// 1. Open a drawing.
// 2. Open the Immediate window.
//
// Postconditions:
// 1. Gets and sets DXF-related system settings.
// 2. Saves the drawing as a DXF file in the same folder as the drawing,
//    overwriting any existing file of the same name.
// 3. Examine the Immediate window and the folder to which the DXF file
//    was saved.
//----------------------------------------------------------------------------

using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
using System;
using System.Diagnostics;
namespace SaveDrawingAsDXF_CSharp.csproj
{
    partial class SolidWorksMacro
    {

        ModelDoc2 swModel;
        string sPathName;
        int nErrors;
        int nWarnings;
        int nRetval;
        bool bShowMap;

        bool bRet;

        public void Main()
        {
            swModel = (ModelDoc2)swApp.ActiveDoc;

            // Strip off SOLIDWORKS drawing file extension (.slddrw)
            // and add DXF file extension (.dxf)
            sPathName = swModel.GetPathName();
            sPathName = sPathName.Substring(0, sPathName.Length - 6);
            sPathName = sPathName + "dxf";
            Debug.Print(sPathName);

            // Show current settings
            Debug.Print("DxfMapping             = " + swApp.GetUserPreferenceToggle((int)swUserPreferenceToggle_e.swDxfMapping));
            Debug.Print("DXFDontShowMap         = " + swApp.GetUserPreferenceToggle((int)swUserPreferenceToggle_e.swDXFDontShowMap));
            Debug.Print("DxfVersion             = " + swApp.GetUserPreferenceIntegerValue((int)swUserPreferenceIntegerValue_e.swDxfVersion));
            Debug.Print("DxfOutputFonts         = " + swApp.GetUserPreferenceIntegerValue((int)swUserPreferenceIntegerValue_e.swDxfOutputFonts));
            Debug.Print("DxfMappingFileIndex    = " + swApp.GetUserPreferenceIntegerValue((int)swUserPreferenceIntegerValue_e.swDxfMappingFileIndex));
            Debug.Print("DxfOutputLineStyles    = " + swApp.GetUserPreferenceIntegerValue((int)swUserPreferenceIntegerValue_e.swDxfOutputLineStyles));
            Debug.Print("DxfOutputNoScale       = " + swApp.GetUserPreferenceIntegerValue((int)swUserPreferenceIntegerValue_e.swDxfOutputNoScale));
            Debug.Print("DxfMappingFiles        = " + swApp.GetUserPreferenceStringListValue((int)swUserPreferenceStringListValue_e.swDxfMappingFiles));
            Debug.Print("DxfOutputScaleFactor   = " + swApp.GetUserPreferenceDoubleValue((int)swUserPreferenceDoubleValue_e.swDxfOutputScaleFactor));
            Debug.Print("");

            // Turn off showing of map
            bShowMap = swApp.GetUserPreferenceToggle((int)swUserPreferenceToggle_e.swDXFDontShowMap);
            Debug.Print("bShowMap = " + bShowMap);

            swApp.SetUserPreferenceToggle((int)swUserPreferenceToggle_e.swDXFDontShowMap, false);

            bRet = swModel.SaveAs4(sPathName, (int)swSaveAsVersion_e.swSaveAsCurrentVersion, (int)swSaveAsOptions_e.swSaveAsOptions_Silent, ref nErrors, ref nWarnings);

            if (bRet == false)
            {
                nRetval = swApp.SendMsgToUser2("Problems saving file.", (int)swMessageBoxIcon_e.swMbWarning, (int)swMessageBoxBtn_e.swMbOk);
            }

            // Restore showing of map
            swApp.SetUserPreferenceToggle((int)swUserPreferenceToggle_e.swDXFDontShowMap, bShowMap);

        }


        public SldWorks swApp;

    }

}