Description

File data is not available in the Upload's OnSuccess event.

Regression in version 9.0.0 introduced with the addition of the chunk upload functionality.

https://github.com/telerik/blazor/blob/master/js/telerik-blazor/src/upload/upload.ts#L282-L288

Steps To Reproduce

1. Attach a handler to the OnSuccess event:

<TelerikUpload SaveUrl="/api/upload/save"
               RemoveUrl="/api/upload/remove"
               OnSuccess="@OnSuccessHandler" />

@code {
    async Task OnSuccessHandler(UploadSuccessEventArgs e)
    {
        foreach (var file in e.Files)
        {
            Console.WriteLine($"Name = {file.Name}, Size = {file.Size}, Extension = {file.Extension}");
        }

        StateHasChanged();
    }
}

2. Upload a file and try to access its Name, Size, and Extension properties in the event handler.

Actual Behavior

The properties have their default values (null for Name and Extension and 0 for Size).

Expected Behavior

The actual file data is accessible in the OnSuccess event handler.

Browser

All

Last working version of Telerik UI for Blazor (if regression)

8.1.1

accessibility issue - upload is not notifying files are chosen

Impacts screen reader users

[WCAG 1.3.1 level A] [WCAG 4.1.3 level AA]

tested using NVDA on chrome browser

input (type="file") status always reads as 'no file chosen' when one or more files have been chosen (correct when no files are chosen). 

on choosing a file to upload (so no file chosen yet), screen reader advises; web page title, chrome, page contents, file input status (same behaviour as default html 5 file input). On choosing a file a default browser html 5 file input will advise a file has been chosen. The list shown below the Telerik component is not known to a screen reader user

Accessibility issue

impacts keyboard user

[WCAG 2.1.1 level A]

tested using NVDA on chrome browser

the ability to remove, review, & navigate (with direction keys) each item chosen for upload is not directly accessible via a keyboard, To overcome this the user needs a screen reader to read line by line.  
At least, a screen reader user can do the following inside the list:

• be advised (when forcefully reading line by line); how many items in list, filename, file is incorrect or file size, (optional) reload button, and remove button.
• use 'del' key to remove an item. 

The upload status hangs on "Uploading..." if the Upload component is hosted in a Dialog and the OnSuccess event is used.

<AdminEdit>

As a workaround, you can host the Upload in a Window, where this issue is not present

</AdminEdit>

In version 2.9.0 of the library there are two small spelling issues:

Scheduler_Recurrence_Editor_Frequencies_Monthly: Montly //Montly is written without "h"
Upload_InvalidMinFileSize: File size too small //Missing dot after the message (E.g. Upload_InvalidMaxFileSize has an ending dot).

Best regards,

Christian