How to get CID when using Delegated Authentication with the Live Messenger IM Control?

Question

I want to create a page containning a Live Messager IM Control. After delegated authentication, I got a valid token object(I used the code in c# sample). But I need the CID in order to use IM Control. How to get it? Using ProcessToken method of WindowsLiveLogin class? I tried, but the returned user object is null. What should I do to get the cid?

Answer 1

Hello Alan,

The CID is the same as the Location ID provided with Delegated Authentication; the only difference is that the Location ID is in hexadecimal format while the CID should be in signed decimal format.

The following code sample converts a Location ID to a CID:

WindowsLiveLogin.ConsentToken consentToken = <your token>;
long cid;

if (!Int64.TryParse(consentToken.LocationID,
    System.Globalization.NumberStyles.HexNumber, null, out cid))
    throw new InvalidOperationException("The Location ID is not a hexadecimal number");

// Variable cid now contains a valid decimal number which you can use as CID.

Answer 2

Yes, it's the answer. Thanks to ChrisW_.