How to rename / access / manipulate individual file using Blazor Upload Component

[Steven]

Hi,

Hi I am writing an app where user can upload files (multiple at once) and each file will have custom data attached to it.

How do I access individual files and attach custom data to each file once I load them into the select file grid?

Almost like a SelectedItem event in a grid where I can access the individual files which I click on it.

I can use the OnUpload and OnSelect to send custom data and look through all the files but They aren't bind to the individual file.

Example, I have data like a description for each individual files that I want to send with it when I upload and write to the database. How do I bind that data to the file?

[Nadezhda Tacheva]

Hi Steven,

You can indeed use the OnSelect and OnUpload events to send custom data or rename a file. It is not, however, possible to send custom data bound to the individual file - the attached request data is one whole piece.

The Upload always makes a separate call to the controller for each file. So, your options are:

• Send custom meta data for all files with every request, for example, as a serialized Dictionary<> or any other object type. Then, deserialize the object in the controller and find the correct meta data for the currently received files in the controller method.
• Set Multiple="false", so that users can upload files one by one.

Regards,
Nadezhda Tacheva
Progress Telerik