The upload component does not allow retrieving the file names of the uploaded files in the progress event. That makes real life scenarios complicated.
Most of the UI for uploading a file start with a "Choose button" and a file choose dialog (like Radzen). Then, the progress bar shows information about the upload (like Radzen). However, when the upload is completed, the UI usually changes to show the file name of the uploaded file and an option to discard the upload in case of a mistake. With Radzen I can't get that information.
I think a new event is needed. f.e. UploadComplete, that should notify of the uploaded file names, sizes and types, and the data returned from the upload controller (f.e. to get the ids of the uploaded files).
With the current control I can upload files but then the blazor page cannot associate them with an entity or remove the association.