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Daniel B.97's avatar
Daniel B.97
New member | Level 1
11 years ago

OAuth2 implicit grant (token flow) does not work in IE/.Net Winform WebBrowser

Currently I'm developing a .Net WinForms desktop app. I initiate a token-based OAuth2 flow with this URL in IE11 (or to be more precise: the WebBrowser control of .Net WinForms): https://www.drop...
API
Steve M.'s avatar
Steve M.
Icon for Dropbox Staff rankDropbox Staff
11 years ago

Ah! I can reproduce this too, but only when the user is authorizing an app they've already authorized (so they skip the screen asking them to "allow" access). I don't understand why this makes a difference as to whether the DocumentCompleted event is fired, but it seems to. (You can try this yourself by revoking your app's access via https://www.dropbox.com/account/security and then trying again. You should see the DocumentCompleted event fire as expected.)

To fix this, I'd recommend using the Navigated event instead. This seems to reliably fire in both cases. I'm going to update the blog post to suggest that. Please let me know if it works for you.

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