Need .Net sample for download to file

[sanjayssk]

I'm using Dropbox API in an asp.net application. I have managed to download the file contents into a stream upto the following line of code in an async task.

var strm = response.GetContentAsStreamAsync();

But I can't find a sample of how to write this stream finally to a file on the web server for which I do have a path DestPath. I have tried using some .Net code to write Stream to file but that complains and can not compile because the above strm and IO.Stream are different. I can't find a sample in .Net SDK for dropbox. Can someone help?

[Greg-DB · Accepted solution]

The GetContentAsStream method yields a Stream, so you should be able to use CopyTo like this:

var strm = await response.GetContentAsStreamAsync();

using (var fileStream = File.Create(localFilePath))
{
    strm.CopyTo(fileStream);
}

[sanjayssk]

Thanks for the speedy reply! I was missing the "await" and hence it was complaining that CopyTo is not a method of Task<Stream>.

[sanjayssk]

Any ideas how to catch a Timeout exception for large downloads? I tried using Try/Catch but it is not raised.

Update: I tried this code but it doesn't cause a timeout.

var expirationTimeTask = Task.Delay(TimeSpan.FromSeconds(30));
var strm = response.GetContentAsStreamAsync();
var finishedTask = await Task.WhenAny(expirationTimeTask, strm);
if (finishedTask == expirationTimeTask)
{
   //timeout error processing (does not get here)
}   

[sanjayssk]

Oops. On debugging, I found that it is stuck at CopyTo and that takes a long time and times out. So does the actual download occur on "CopyTo"?

Update: Was above to solve this by studying the Asp.net samples on:

https://docs.microsoft.com/en-us/aspnet/web-forms/overview/performance-and-caching/using-asynchronou...

[yasirjaseem]

How to call it on windows/desktop application to download file.

[Greg-DB]

@yasirjaseem We recommend using the official Dropbox .NET SDK. There's an example of downloading files here. If something isn't working as expected for you, open a new thread with details.

[kelly0318]

i am tring to downlaod a maual but it will not work

[Greg-DB]

@kelly0318 This is an old thread about writing code to download from Dropbox programmatically. If you need help using Dropbox itself you may want to open a thread in the 'Help from the Community > Files & folders' section or otherwise contact support.