This project has moved. For the latest updates, please go here.

api authentication "property evaluation failed"

Topics: Developer Forum
Apr 12, 2009 at 10:18 PM
Hi all,

I am having a real issue getting the API to work from my asp.NET webpage. I have downloaded the demo code from here and have imported the code into my project. I have set the various keys in the web.config and I get the error "property evaluation failed" when doing a response redirect to the auth_url. I have my API set up with the correct callback URL (by the way)

I have 2 questions.

1. Anyone know what this error is and how I can get around it?

2. Do you HAVE to go to that 'Do you want to allow this application access' page every time or is there a nice way to allow it in advance?

Thanks a lot in advance for your help with this.
Apr 12, 2009 at 10:24 PM
p.s. I only know about number 2 because I copied and pasted the auth_url into a seperate browser and it took me to flickr to ask me the question....

Thanks again.

Happy easter by the way - I will check once we are all back at work again......

Apr 14, 2009 at 9:49 AM
Hi again,

This was an asp.NET error as opposed to anything with flickrNet.

Apr 14, 2009 at 10:37 AM
Glad you got the problem sorted.

You don't need to go to that page each time if you store the authentication token somewhere - either server side in a database perhaps, or in a client side cookie.
Apr 14, 2009 at 2:02 PM

Thanks Sam.