How do I know the upload is complete

[answer0732]

when i upload file to cloud, I want to know when it is completed(Success or failure )

uploadFile return Future , when i use it , it's return null , Is this a sign of completion?

Client webDavClient = Client(_address, _username, _password, '/', protocol: 'https');
Future<dynamic> result = await webDavClient.uploadFile(localPath, 'somePath/' + 'myFile.db');
print('result is $x');

this is message : result is null