Uploading an update to a file with WriteMode.AsOverwrite mode with Id or Path fails

[sbrownnw]

Hello.  I am using the .Net Dropbox.Api (6.37.0) with the following code sample:

using Dropbox.Api;
using Dropbox.Api.Files;
using System.Text;

namespace Dropbox
{
   internal class Program
   {
      static void Main(string[] args)
      {
         DropboxClientConfig config = new DropboxClientConfig
         {
            MaxRetriesOnError = 0
         };
         DropboxClient dropboxClient = new DropboxClient(AccessToken.ValidToken, config);

         Stream stream = new MemoryStream(Encoding.UTF8.GetBytes($"this is a test"));
         UploadArg uploadArg = new UploadArg($"/foo{Guid.NewGuid()}.txt"); // upload new file to root
         var result = dropboxClient.Files.UploadAsync(uploadArg, stream).Result;

         stream = new MemoryStream(Encoding.UTF8.GetBytes($"this is an updated test"));
         result = dropboxClient.Files.UploadAsync(result.Id, mode: new WriteMode().AsOverwrite, body: stream).Result;
      }
   }
}

 When running, the second UploadAsync throws an path/conflict/file exception.  This also repros if I change the first parameter in the second UploadAsync to result.PathLower.

Why is this?

[Greg-DB · Accepted solution]

Please use Dropbox.Api.Files.WriteMode.Overwrite.Instance to set the overwrite mode (instead of AsOverwrite).

[sbrownnw]

Ok.  Strange, but ok.

I tried the similar code and it does not compile with:     mode: WriteMode.Update.Instance
And it throws the same exception with:     mode: new WriteMode().Update

What do I use for Updating a file?

[Greg-DB]

For the update write mode, you need to supply the rev value that you are intending to update, so you would make that like: new WriteMode.Update(result.Rev)

[sbrownnw]

Thanks

[sbrownnw]

I still get a compilation error following your example (FileMetadata.Rev is a string):

[Greg-DB]

That error is occurring because you're missing the "new" necessary to create that instance. Please add the "new" back like in my message and try again.