ASP.NET MVC Image Viewer
How to open, view, edit new PDF created from multiple images programmatically in web browser in C# ASP.NET web apps.

Open, read, view and markup a new PDF file programmatically in ASP.NET using C# is very simple. EdgePDF provides a simple C# demo code to accomplish the job.

• Create a new PDF from list of image files
• Read, view PDF using EdgePDF in web browser
• Easy to enable conversion feature in ASP.NET Forms, MVC web applications using C#

How to view, create PDF from images programmatically in asp.net using C#

1. Download EdgePDF asp.net PDF viewer web control
2. Install EdgePDF demo project in IIS
3. Follow step by step tutorial

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Preparation

To run the following tutorial successfully, we need the following setup ready.

1. For ASP.NET Core web app: Setup EdgePDF
2. For ASP.NET Core MVC web app: Setup EdgePDF
3. For ASP.NET (.net framework): Setup EdgePDF on IIS
4. Several demo PDF files in folder C:\temp\

How to read, view PDF from multiple image files in web browser in ASP.NET C#?

The following steps and C# source code will learn how to open, view a new PDF from list of existing image files in web browser using C# ASP.NET web application.

After you have completed the following guide, you can open, view, comment a PDF file created from 3 image files online through url (a sample url http://localhost:56643/?yourtarget1=pdf-image-0.jpg&yourtarget2=pdf-image-1.jpg&yourtarget3=pdf-image-2.jpg)

• For ASP.NET Core web app, open file UserCommandProcessMiddleware.cs from /DemoProjects/EdgePDF for ASP.NET Core/


• For ASP.NET (.net framework) project, open file UserCommandProcessHandler.ashx from {EdgePDF demo project}/RasterEdge_Resource_Files/


• Go to method FileProcess()
• Get 3 images key from url parameters, "yourtarget1", "yourtarget2", "yourtarget3"
• Get 3 images' Bitmap objects, added to a Bitmap list.
• Create a new PDFDocument object with 3 Bitmap objects loaded
• Call method REProcessControl.PageLoadFile() to load, view new created PDF from 3 image files in web browser

    public override PDFWebDocument FileProcess()
    {
        HttpRequest request = this.Context.Request;

        if (!String.IsNullOrEmpty(request.QueryString["yourtarget1"]) && !String.IsNullOrEmpty(request.QueryString["yourtarget2"]) && !String.IsNullOrEmpty(request.QueryString["yourtarget3"]))
        {
            String filePath1 = @"C:\\temp\" + request.QueryString["yourtarget1"];
            String filePath2 = @"C:\\temp\" + request.QueryString["yourtarget2"];
            String filePath3 = @"C:\\temp\" + request.QueryString["yourtarget3"];

            Bitmap image1 = new Bitmap(filePath1);
            Bitmap image2 = new Bitmap(filePath2);
            Bitmap image3 = new Bitmap(filePath3);

            List<Bitmap> images = new List<Bitmap>();
            images.Add(image1);
            images.Add(image2);
            images.Add(image3);

            PDFDocument combinedImagesPdf = new PDFDocument(images.ToArray());

            String fileName = "PDF from 3 images";
            return REProcessControl.PageLoadFile(request, this.Manager, combinedImagesPdf, fileName);
        }
        else
        {
            Logger.Log(">>> Unknown load file mode. Load default file defined in Web.config.", LogType.DEBUG);

            // load default file. defined in Web.config
            return REProcessControl.PageLoadFile(request, this.Manager, "", LoadType.Server);
        }
    }