MIME types

[G]

 Is there anyway in that Silverlight Upload can return the MIME type of a file that has been uploaded?

[Ivan]

Hello G,

Thank you for the interest in our RadUpload control.

Generally there are two parts that work together in the upload process: the RadUpload control (at client side) and the upload handler (at server side). You should decide where the check-code will reside - for example:

1. if you put the check-code at server side (in upload handler) you should return the MIME type as a custom parameter from the upload handler. More information you can find in the Returning custom data from the handler article.
2. if you put the mine-check-code at the client side you should run it inside the FileUploaded event-handler. Note all the information about the uploaded file and the status of the upload itself are in the FileUploadedEventArgs argument (the second one), for example:
   
   

   private void RadUpload1_FileUploaded(object sender, FileUploadedEventArgs e)
   {
       if (e.HandlerData.IsSuccess)
       {
          ExploreMIME.GetType(e.SelectedFile.File);
   . . .

Please give it a try and let me know if you need more assistance.

Sincerely yours,
Ivan
the Telerik team

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[KDL]

I know this is an old thread but I'm having the same problem. I need to know the MIME type of the file and this post indicates that it's available. The example given didn't work for me. I am able to pass values between the RadUpload control and the Handler without a problem, but I'm just not seeing how to get the mime type in the first place. Thanks!

[Tina Stancheva]

Hello Kent,

The RadUpload control doesn't expose a method or property which can give you the MIME type, but you can create a custom method for finding the MIME type of a file based on its extension for example. You can have a look at this thread where different approaches, for getting the MIME type of a file, are discussed.

Regardless of the approach you choose for getting the MIME type, it would be best to place the logic on the server-side part of the RadUpload control. You can override the SaveChunkData method and as soon as the entire file is uploaded, implement a custom method to get its MIME type:

string MIMEType;
      public override bool SaveChunkData(string filePath, long position, byte[] buffer, int contentLength, out int savedBytes)
      {
          bool result = base.SaveChunkData(filePath, position, buffer, contentLength, out savedBytes);

          if (this.IsFinalFileRequest())
          {
              FileInfo fi = new FileInfo(filePath);
              MIMEType = GetMimeType(fi);
          }
          return result;
      }

Then you can use the MIME type on the server or pass it to the client by overriding the GetAssociatedData() method. I attached a sample project to get you started, please give it a try and let me know if it helps.

Greetings,
Tina Stancheva
the Telerik team