The problem with the MediaElement in WPF .NET 8.0 not supporting relative paths for the media source,Why?

Sanjay Kumar Jha 151 Reputation points
2024-04-08T08:17:36.1833333+00:00

Hi,

I'm attempting to utilize the MediaElement in WPF to play video files with either .mp4 or .wmv extensions. However, I've encountered issues when passing the source as a relative path or a Pack URI. Strangely, it works fine when I provide an absolute path. I'm curious if there have been any changes in path resolution in .NET 8.0, as the same functionality was operational in .NET Framework 4.5.1. Any assistance in resolving this issue would be greatly appreciated.

Source Code:-https://vemp-my.sharepoint.com/:u:/g/personal/sanjaykumarjha_virtualemployee_com/EWpfo3O67YhJv-sk3_4cpUoBJby65oPXjukw8PQotjaC-Q?e=dBbPHu

Thanks,

Sanjay

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  1. Hui Liu-MSFT 41,261 Reputation points Microsoft Vendor
    2024-04-26T07:32:05.8233333+00:00

    According to my testing, the relative source in xaml works when the video's property "Copy to Output Directory" is set to "Copy always".

    I set the property "Copy to Output Directory" of the video w.wmv to "Copy always" and tested, it works.

    Method 1:

    <MediaElement Name="myMediaElement1"  LoadedBehavior="Manual"
      Source="Videos\w.wmv" IsHitTestVisible="True" 
       Margin="10">
    </MediaElement>
    
    
    

    Method 2:

      <MediaElement Name="myMediaElement"  LoadedBehavior="Manual"
       IsHitTestVisible="True"  
       Margin="10">
      </MediaElement>   
    
         Uri videoUri = new Uri("Videos/w.wmv", UriKind.RelativeOrAbsolute);
        myMediaElement.Source = videoUri;
    
    
    

    Method3: still not working

     Uri videoUri = new Uri("pack://application:,,,/MediaElementSampleProject;component/Videos/w.wmv", UriKind.RelativeOrAbsolute);
         myMediaElement.Source = videoUri;
    
    
    
    

    You could use the previous two methods.


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