Get Preview Bitmaps of Drawing Sheets Example (C#)

This example shows how to get PNG preview bitmaps of the sheets in a drawing document.

//--------------------------------------------------------------------------

// Preconditions:

// 1. Specified drawing document exists.

// 2. References to Microsoft.VisualBasic.Compatiblity,

//    System.Drawing, stdole, and

//    SolidWorks.Interop.swdocumentmgr exist in Project References

//    (click Project > Add Reference in the

//    SolidWorks Visual Studio Tools for Applications IDE

//    to add them if needed).

//

// Postconditions:

// 1. Preview bitmaps of the sheets in the

//    drawing document are created in c:\temp.

// 2. Right-click a just-created preview bitmap

//    file, and select Preview.

//--------------------------------------------------------------------------

 

using SolidWorks.Interop.sldworks;

using SolidWorks.Interop.swconst;

using System;

using System.Diagnostics;

using SolidWorks.Interop.swdocumentmgr;

using Microsoft.VisualBasic.Compatibility.VB6;

using System.Drawing;

using stdole;

using System.Windows.Forms;

 

namespace PNGBitmapsISwDMSheet2CSharp.csproj

{

    partial class SolidWorksMacro

    {

        public void Main()

        {

            SwDMClassFactory swClassFact;

            SwDMApplication swDocMgr;

            SwDMDocument10 swDoc;

            string sDocFileName;

            SwDmDocumentType nDocType;

            SwDmDocumentOpenError nRetVal;

            string sLicenseKey = null;

 

            // Specify your license key

            sLicenseKey = "your_license_key";

 

           // If the following drawing document doesn't exist on your system,

            // then substitute the name of a drawing document that does

            sDocFileName = "C:\\Program Files\\SolidWorks Corp\\SolidWorks\\samples\\tutorial\\advdrawings\\foodprocessor.slddrw";

            nDocType = SwDmDocumentType.swDmDocumentDrawing;

            swClassFact = new SwDMClassFactory();

            swDocMgr = swClassFact.GetApplication(sLicenseKey);

            swDoc = (SwDMDocument10)swDocMgr.GetDocument(sDocFileName, nDocType, true, out nRetVal);

            if ((swDoc == null))

            {

                MessageBox.Show("Unable to open document.");

            }

 

            stdole.IPictureDisp pPreview;

            Image image;

            object Sheets;

            object[] oSheets;

            SwDMSheet2 Sheet;

            SwDmPreviewError nErrors;

            int i;

 

            // Get the sheets in the drawing document

            Sheets = (object[])swDoc.GetSheets();

            oSheets = (object[])Sheets;

string nbrSheets;

nbrSheets = System.Convert.ToString(oSheets.Length);

Debug.Print ("Number of sheets: " + nbrSheets);

Debug.print (" ");

 

         

 for (i = 0; i < oSheets.Length; i++)

            {

                Sheet = (SwDMSheet2)oSheets[i];

                Debug.Print(Sheet.Name);

                Debug.Print(Sheet.PreviewPNGStreamName);

                pPreview = (stdole.IPictureDisp)Sheet.GetPreviewPNGBitmap(out nErrors);

                if (nErrors == 0)

                {

                    // For each sheet, convert the picture to an

                    // image and save it as .png file

                    image = Support.IPictureDispToImage(pPreview);

                    image.Save("c:\\temp\\" + Sheet.Name + ".png", System.Drawing.Imaging.ImageFormat.Png);

                    byte[] PreviewPNGByteArray;

                    string nbrBytes;

                    PreviewPNGByteArray = (byte[])Sheet.GetPreviewPNGBitmapBytes(out nErrors);

                    nbrBytes = System.Convert.ToString(PreviewPNGByteArray.Length);

                    Debug.Print ("Number of bytes in preview's PNG byte array: " + nbrBytes);

                }

                else

                {

                    switch (nErrors)

                    {

                        case SwDmPreviewError.swDmPreviewErrorNoPreview:

                            Debug.Print("Error: No preview data stored wiht document.");

                            break;

                        case SwDmPreviewError.swDmPreviewErrorMakeBmpFail:

                            Debug.Print("Error: Failed to make the bitmap.");

                            break;

                    }

            }

            swDoc.CloseDoc();

 

        }

 

        /// <summary>

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

        /// </summary>

        public SldWorks swApp;

 

    }

}