Download file with progress bar

Download file with progress bar

Posted by: bedwired on 18 September 2023, 8:55 am EST

• 

  bedwired

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  Posted 18 September 2023, 8:55 am EST

  Hello everyone, this is my first post here.
  
  I am working on an ASP.Net Web Forms app and i need to download a file with a progress bar showing the download progress.

  At the moment i am lost in the various methods i found online and didn’t manage to make one work, other than the old System.IO.File.WriteAllBytes(), which doesn’t allow me to update a progress bar.

  Any help?

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  bedwired

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  Posted 18 September 2023, 4:40 pm EST

  Download worked using this but in the Page_Load only

  Still didnt manage to track the download status

  try
          {
              string filePath = MapPath(path);
              FileInfo file = new FileInfo(filePath);
              if (file.Exists)
              {
                  Response.Clear();
                  Response.ClearHeaders();
                  Response.ClearContent();
                  Response.AddHeader("Content-Disposition", "attachment; filename=\"" + file.Name + "\"");
                  Response.AddHeader("Content-Length", file.Length.ToString());
                  //Response.ContentType = "video/mp4";
                  Response.Flush();
                  Response.TransmitFile(file.FullName);
                  Response.End();
              }
          }
          catch (Exception ex)
          {
              //handle error
          }

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  manish.gupta

  

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  Posted 19 September 2023, 7:16 am EST

  Hello,
  
  There is no such method that detects the progress of the downloading file with the code snippet used.
  
  Please refer to the following Stackoverflow link that might help you:
  
  https://stackoverflow.com/questions/9459225/asynchronous-file-download-with-progress-bar
  
  In client_DownloadProgressChanged method, you may update the progressbar.

  Hope it helps!

  Regards,
  
  Manish Gupta