Open any kind of file with an uwp app (without file association)

Question

I am making a simple uwp text editor app. I want the app to open any kind of file even without file associations declared since there are many text files which don\'t have k

Answer 1

In Windows 10 2004 (build 19041) microsoft introduced uap10:FileType attribute in package manifest and by providing * as the value the app is available in open with menu of all types of files. To use this just add the following code to your manifest:

xmlns:uap10="http://schemas.microsoft.com/appx/manifest/uap/windows10/10"
...

  
    Assets\mylogo.png
    
      .txt
      *
    
  

This only works for Windows 10 build 19041 and above. The additional uap:FileType is necessary if app targets minimum version below 19041 to pass manifest validation, otherwise it can be omitted.