Is GroupDocs.Signature support .net core

GroupDocs.Signature Product Family
1

SignatureApiController → PreviewOption is not working.

2

@sulk

GroupDocs.Signature supports .NET Core. Please share following details and we’ll look into this matter:

  • GroupDocs.Signature API version that you are using
  • Sample code/application
3

Can you please share sample code for .NET core?
I did not find in git repository.

4

@sulk

Please take a look at this code example - Generate document pages and the API reference.

5

image.png (77.2 KB)

check this error

6

@sulk

It’d be great if you could share a sample application with us. Also specify the API version that you are using.

7

Hello,
Here is sample code link. I tried to convert MVC sample code to asp.net core

8

@sulk
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): SIGNATURENET-4883

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

9

@sulk

The problem is caused by using lambda expression instead of preview saving method. During performing of GeneratePreview method firstly we call delegate to save result to stream, and secondly we call stream release delegate to dispose it by default. Disposed stream couldn’t be used anymore.
So, for your case it is better to provide empty release method to avoid stream disposing.
Please, use example like this:

private static MemoryStream RenderPageToMemoryStream(GroupDocs.Signature.Signature signature, int pageNumberToRender)
{
    // Initialize a MemoryStream to store the rendered page
    MemoryStream result = new MemoryStream();
    
    // Configure preview options for rendering a specific page to PNG format
    PreviewOptions previewOptions = new PreviewOptions(pageNumber => result, ReleasePageStream)
    {
        PreviewFormat = PreviewOptions.PreviewFormats.PNG,
        PageNumbers = new[] { pageNumberToRender },
    };

    // Generate a preview of the specified page
    signature.GeneratePreview(previewOptions);

    // Return the rendered page as a MemoryStream
    return result;
}

private static void ReleasePageStream(int pageNumber, Stream pageStream)
{
    // Your code implementation for releasing page stream
    // This method can contain logic for releasing resources or handling the page stream
    // Not implemented in this example
}