I want to detect when a user has added or removed an annotation in the PDF Viewer.

Trying to upload a large file from a mobile device breaks the component.
Step to reproduce:

1. Open this REPL example on a mobile device
2. Click the "Load Data" button.

The issue can be reproduced only in version 8.0.0

The PDF Viewer fails to display the loaded document if StateHasChanged() is called when the Data parameter is set.

A possible workaround is to call await Task.Delay(...) after StateHasChanged()

Test Page (run this in a server app):

<h1>PDF Viewer Tests</h1>

<h2>Load Initially</h2>

<TelerikPdfViewer Data="@FileData1"
                  EnableLoaderContainer="true"
                  Height="30vh"
                  Zoom="0.75m">
</TelerikPdfViewer>

<h2>Load On Demand</h2>

<TelerikButton ThemeColor="@ThemeConstants.Button.ThemeColor.Primary"
               OnClick="@( async () => await LoadPdf(2) )">Load PDF</TelerikButton>

<TelerikPdfViewer Data="@FileData2"
                  EnableLoaderContainer="true"
                  Height="30vh"
                  Zoom="0.75m">
</TelerikPdfViewer>

@code {
    private byte[]? FileData1 { get; set; }
    private byte[]? FileData2 { get; set; }

    protected async override Task OnInitializedAsync()
    {
        await LoadPdf(1);
    }

    public async Task LoadPdf(int id)
    {
        await Task.Delay(1000);

        if (id == 2)
        {
            FileData2 = Convert.FromBase64String(PdfBase64);
        }
        else
        {
            FileData1 = Convert.FromBase64String(PdfBase64);
        }

        StateHasChanged();

        await Task.Delay(300);
    }

    private const string PdfBase64 = "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";
}

I want to have an option for digital signatures with browser-based certificate selection.

===

ADMIN EDIT

===

For the time being, you can use the following custom approach: Signing PDFs with PdfPRocessing in PdfViewer.

Hello, I like the Telerik PDF Viewer for Blazor, but it's not supporting Table of Contents (TOC) links.  I would like to request this feature so that there are links in the TOC automatically.  I'm using Blazor WebAssembly.

Thank you for considering my request.

Adding the ability to fill in a PDF online in the PDF Viewer would open a lot of opportunity to the library.

The ability to fill-out, sign, and date would be great with a save callback, so it can be pushed to an API.

Hallo,

i want to Render PDF Files with the PDF Viewer Component.

The Data of the PDF is already fetched from the API when the PDF-Viewer starts Rendering the Loading animation appears and freezes.

After a few Seconds the PDF will be Rendered.

The size of the PDF File is about 5MB.

When you search for a term, the document is not scrolled. Also when the user inserts a search term and clicks Enter the document is scrolled to the second match instead of the first one.

This request is for allowing to open other document types in PDF Viewer - for example, Word, Excel. The functionality will target viewing only and not editing.

1. Handle the OnOpen event to get the file bytes
2. Use the appropriate format provider of the RadSpreadProcessing library to import the Word/Excel file
3. Export the file with the PdfFormatProvider
4. Pass the converted file to the PDF Viewer to display it

Note: We've registered a bug with this solution. The PDF Viewer does not open other types of documents from the FileSelect in the Toolbar, they can be opened only on initialization of the component. Currently, the bug is in our backlog. Once fixed, the above-listed solution can be used to configure the PDF Viewer for viewing other document types. A knowledge base resource will be published on the matter.

The loading animation is visible only when a user opens a file from the Toolbar of the component. When programmatically opening a file, the loader is not shown.