CSharp SDK dbx.Files.UploadAsync doesn't work

I suspect that the error is that your path doesn't start with a slash. In API v2, paths should either be empty, meaning the root of the user's Dropbox, or they should start with a slash. So try using "/test" as the value of folder.

As to why you don't see the exception, my C# async/await knowledge is somewhat limited. Is the containing method marked async? I think from just this snippet of code, it may not be possible to tell if the exception should get caught here or not.

Hi Steve, thanks for your tip, I've tried the forward slash but it doesn't work.

The primary call is essentially straight from the CSharp SDK, which is:

using (var dbx = new DropboxClient("My_Key"))

{

    await UploadToDropBox(dbx, "/test", "test.txt", "Hello Dropbox"); // tried with /test and just test

}

And the method it calls (exactly from the SDK with a Console.WriteLine(...) removed: 

async Task Upload(DropboxClient dbx, string folder, string file, string content)
{
    using (var mem = new MemoryStream(Encoding.UTF8.GetBytes(content)))
    {
        var updated = await dbx.Files.UploadAsync(
            folder + "/" + file,
            WriteMode.Overwrite.Instance,
            body: mem);
    }
}

But, as stated, without results.

Kind regards,

Anthony

Hi,

Would you mind providing your static void Main function? That would be helpful for us to figure out how you make the async call.

Thanks Qiming, with a slight adjustment to that, the errors are now indeed throwing properly, I'll put my main function here and then the errors:

static void Main(string[] args)

{

    var task = Task.Run((Func<Task>)Program.Run);

    task.Wait();

}

static async Task Run()

{

    CIPostBuildTask postBuild = new CIPostBuildTask();

    await postBuild.Run();

}

The following line (which I added to my first post in a try-catch), shows the error that follows:

var full = await dbx.Users.GetCurrentAccountAsync();

ERROR: Error in call to API function "users/get_current_account": The given OAuth 2 access token is malformed.

In addition, the following line throws the following error in it's try-catch statement:

var updated = await dbx.Files.UploadAsync(

    folder + "/" + file,

    WriteMode.Overwrite.Instance,

    body: mem);

ERROR: Error in call to API function "files/upload": The given OAuth 2 access token is malformed.

Solved it!

Qiming - thanks, your help caused me to realise I'd used the App Key instead of the OAuth 2 Generated Access Token.

Steve - thanks, indeed I had to preface the folder with a forward slash as you said as with it, it works, and without it, it generates the error (quite a long one but here for posterity):

Error in call to API function "files/upload": HTTP Header "Dropbox-API-Arg": path: 'test/text.txt' did not match pattern '/.*'

Thanks Chaps, it was lovely to see the Dropbox toast informing me that the file had been uploaded!

Anthony