How do you check if a file exists?

[Anke]

@Taifun

however the purpose of an extension is to provide functionality, which is not possible with built in components... and as the file component starting with the coming release is able to copy, delete etc. itself, my suggestion is to use the file component then

Yes, but

1. There are some methods that the File component does not offer.

2. The use of your extension is familiar to most users, which is definitely not the case with the new File component.
   

   
   
   On top of that there is one more setting in the designer:
   
   
   
   which defines the API from which READ / WRITE permissions are declared in the Manifest.

3. I need e.g. the method TaifunFile.CopyAsync and the corresponding event (TaifunFile.Copied) to carry out certain actions there. This is not possible with the File component.

4. The same applies for some other methods.

Therefore your extension is still useful and helpful. And the same applies to the FileTools extension from @vknow360.