Thank you for your request. File uploading is a common feature of the ASP.NET
since that for how to’s please check this documentation
. The only thing that you should note is that the file must be uploaded in the the folder which you set as a root storage for the Annotation. Then when you will have upload functional ready for use you should do next:
1. Get uploaded file name
2. Use this file name in the .FilePath(String fileName) option of the Annotation widget.
The logic will be next:
1. File uploaded
2. User see link for annotating this document
3. User clicks it
4. User redirected to the Annotation web page with selected document.