How to Capture a document in Virtual Printer and Open it in a HTML/JavaScript Document Viewer?

#1 Posted : Wednesday, November 20, 2019 9:04:54 AM(UTC)

Abdul Rahman

Groups: Registered
Posts: 60

Hi Team,

Thanks for LeadTools. You guys are doing a great works with your SDK's. I'm planning to purchase LeadTools v20. Right now I'm experimenting with Evaluation Package. I stuck with achieving my functionality. I couldn't find any proper examples. After a long google search. I'm writing here. Please assist me.

My Use Case:

To put in simple words, I need to open any document or any print via my Virtual Printer in LeadTools HTML/JavaScript Document Viewer.

Here are the steps that I have tried.

I have installed Lead Tools V20 Virtual Printer in my Windows 10 PC. Now If I open a word document (or any document) and select File -> Print -> Selecting My Virtual Printer -> Now Click on Print Button.

Now my Virtual Printer's will capture the Print Job and Convert it to PDF and save it in a Path. Here is the Code for that.

Code:


[EmfEventMethodAttribute]
        public static void SaveStreamAsPdf(object sender, Leadtools.Printer.EmfEventArgs e)
        {
            try
            {
                ConsoleMethods.Info("EMF Event: SaveStreamAsPdf");
                // Write the EMF as file to disk.
                const string format = "pdf";
                var fileName = GetRandomFileName(format);
                string path = Path.Combine(
                   GetOutputRootPath(),
                   format + @"\",
                   fileName);
                Directory.CreateDirectory(Path.GetDirectoryName(path));

                // Create an instance of the LEADTOOLS DocumentWriter
                var docWriter = new DocumentWriter();
                docWriter.BeginDocument(path, DocumentFormat.Pdf);

                var page = new DocumentWriterEmfPage()
                {
                    EmfHandle = new Metafile(new MemoryStream(e.Stream.ToArray()))
                      .GetHenhmetafile()
                };
                docWriter.AddPage(page);
                docWriter.EndDocument();
                ConsoleMethods.Success("SaveStreamAsPdf: Complete");
                ConsoleMethods.Verbose(path);

                // Now Here I need to open this file in my HTML5/JavaScript Document Viewer
                Process.Start("http://localhost:20020/index.html?file=" + fileName);
            }
            catch (Exception ex)
            {
                ConsoleMethods.Error(ex.Message, 4000);
            }
        }

Line No 31 in above code opens my HTML5/JavaScript Document Viewer. From here I need to know how to customize LeadTools HTML5/JavaScript Document Viewer example to customize and pass the file name. I'm stuck here. LeadTools HTML5/Javascript Viewer always passes default LeadToolsDemo.Pdf url to the Document Service and it loads the default sample document. Please assist on how to achieve this so that I can demonstrate this to my BOSS and get approval for purchase.

Thanks,
Abdul Rahman

#2 Posted : Thursday, November 21, 2019 9:33:25 AM(UTC)

Matt Bresson

Groups: Registered, Tech Support, Administrators
Posts: 98

Was thanked: 3 time(s) in 3 post(s)

Hello Abdul,

To change the default PDF document that is loaded into the HTML5/JS Document Viewer Demo you need to change line 796 of the Main.ts file

Code:


this.loadDocument("https://demo.leadtools.com/images/pdf/leadtools.pdf", null, false);

Or you can change line line 582 of the Main.js file.

Code:


_this.loadDocument("https://demo.leadtools.com/images/pdf/leadtools.pdf", null, false);

Thanks

Matt Bresson
Developer Support Engineer
LEAD Technologies, Inc.


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How to Capture a document in Virtual Printer and Open it in a HTML/JavaScript Document Viewer?