PdfViewer: Glyph "middot" data cannot be found in Type1Font

ADMIN

Didi

Posted on: 02 May 2020 08:49

Hi Gerald,

Regarding to the error message, as I explained the option is using SourceException event.

At this time I cannot commit a time frame when a fix for this issue will be provided. Follow the feedback item, so you will be notified when its status changes.

Regards,
Didi
Progress Telerik

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Gerald

Posted on: 01 May 2020 16:23

I'm getting the exception now. I wasn't getting it on a previous version, thank you. Is there any way to know before I try to show it? Are you guys providing a fix? If it helps, pdfjs is able to display these files.

Gerald

Posted on: 01 May 2020 12:35

That event does not get hit for the pdfs that do not render. Just get a blank page

private void PdfViewer_SourceException(object sender, SourceExceptionEventArgs e)
{
e.Exception.DebugLog("PdfViewer", this.pdfViewer.Source);
}

ADMIN

Didi

Posted on: 01 May 2020 10:12

Hello,

RadPdfViewer provides a way to catch these cases through its SourceException event. In addition, you could show a user-friendly message to the users through SourceExceptionTemplate.

Example:

PdfViewer definition:

 <Grid>
        <pdfviewer:RadPdfViewer x:Name="pdfViewer" SourceException="pdfViewer_SourceException"/>
</Grid>

code behind:

Func<CancellationToken, Task<Stream>> streamFunc = ct => Task.Run(() =>
    {
        Assembly assembly = typeof(MainPage).Assembly;
        string fileName = assembly.GetManifestResourceNames().FirstOrDefault(n => n.Contains("PDFNAME.pdf"));
        Stream stream = assembly.GetManifestResourceStream(fileName);
        return stream;
    });
    this.pdfViewer.Source = streamFunc;

and the SourceException event handler definition:

public void pdfViewer_SourceException(object sender, SourceExceptionEventArgs e)
{
    var error = e.Exception.Message;
    Device.BeginInvokeOnMainThread(()=> {
        Application.Current.MainPage.DisplayAlert("Error", error, "OK");
    });
}

The exception message is as follow:

System.Collections.Generic.KeyNotFoundException: The given key 'middot' was not present in the dictionary.  at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e]

For more details on PdfViewer SourceException event please check the following link form our help article: https://docs.telerik.com/devtools/xamarin/controls/pdfviewer/pdfviewer-sourceexception

Regards,
Didi
Progress Telerik

Progress is here for your business, like always. Read more about the measures we are taking to ensure business continuity and help fight the COVID-19 pandemic.
Our thoughts here at Progress are with those affected by the outbreak.

Vasile

Posted on: 30 Apr 2020 23:30

Can we see an example of what such .pdf document containing Type1Font "middot" glyph would look like, so we know if we have a similar case? In case of .pdf files resulting from scanning paper forms, there is no easy way tell what fonts were embedded on the scanned document.

Gerald

Posted on: 30 Apr 2020 22:19

Is there a way to atleast give that feedback to the user. The error event shows nothing.