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HOWTO: Completely Disable Upload Feature in WebDocumentViewer

Tananda
DotImage

If you're not using the upload feature in WebDocumentViewer, you can completely disable it in the following way

ASP.NET

In your WebDocumentRequestHandler.ashx codebehind, add a handler for FileUpload and in that handler, set the e.Cancel = true

C#

public WebDocViewerHandler()
{
    this.FileUpload += new FileUploadEventHandler(delegate(object sender, FileUploadEventArgs e) { e.Cancel = true; });
}

VB

Public Sub New()
     AddHandler Me.FileUpload, AddressOf fileUploadHandler
End Sub

Private Sub fileUploadHandler(sender As Object, e As FileUploadEventArgs)
    e.Cancel = True
End Sub

ASP.NET Core (targeting .NET Framework)

In ASP.NET core (targeting .NET Framework) you need to add a WebDocumentViewerCallbacks class to your startup.cs - which is a bit more involved

c#

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseDefaultFiles();
            app.UseStaticFiles();

            RegisteredDecoders.Decoders.Add(new PdfDecoder() { Resolution = 200 });

            app.Map("/wdv", wdvApp => { wdvApp.RunWebDocumentViewerMiddleware(new MyWDVCallbacks()); });

            //app.Run(async (context) =>
            //{
            //    await context.Response.WriteAsync("Hello World!");
            //});
        }
    }


public class MyWDVCallbacks : WebDocumentViewerCallbacks
    {
        public override void DocumentInfoRequested(DocumentInfoRequestedEventArgs args)
        {
            Console.WriteLine("**********===DocumentInfoRequested===**********");
            base.DocumentInfoRequested(args);
        }
        public override void ImageRequested(ImageRequestedEventArgs args)
        {
            Console.WriteLine("**********===ImageRequested===**********");
            base.ImageRequested(args);
        }

        public override void FileUpload(FileUploadEventArgs args)
        {
            args.Cancel = true;
            base.FileUpload(args);
        }
        /*
         * The above was just an example of hooking to the two main events.. you can handle any exposed event here
         *
         * //.. most common ...
         *  AnnotationDataRequested
         *  DocumentSave
         *  DocumentStreamWritten
         *  AnnotationStreamWritten
         *  //.. less common .
         *  PageTextRequested
         *  PdfFormRequested
         *  //.. rarely if ever used .. 
         *  ReleaseDocumentStream
         *  ReleasePageStream
         *  ResolveDocumentUri
         *  ResolvePageUri
         */
    }
Details
Last Modified: 2 Years Ago
Last Modified By: Tananda
Type: HOWTO
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