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Beginner C# V3 API Example

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Beginner C# V3 API Example

I'm attempting to use the API for a C# project.  Unfortunately most of the examples seem to be around Version 2 of the API, or in PHP.  I'm mostly just looking to get a list of contacts.  Is there example code for C# that might be around, that shows the authentication, refresh of key and downloading a contact list?



Re: Beginner C# V3 API Example


Thank you for reaching out to Constant Contact API Developer Support.

Here is an example of what a call to obtain an access token might look like:

string authorization_code = "{authorization code}"
var client = new RestClient(""+ authorization_code +"&redirect_uri={redirect URI}&grant_type=authorization_code&client_secret={secret}");
var request = new RestRequest(Method.POST);
string credentials = "{api key}:{secret}"
byte[] plain = System.Text.Encoding.UTF8.GetBytes(credentials);
base64cred = Convert.ToBase64String(plain);
var base64auth = "Basic " + base64cred;
request.AddHeader("authorization", base64auth);
IRestResponse response = client.Execute(request);

Note that this is what your app would do once the user is redirected to your app after allowing access during the OAuth process. You can use the RestRequest method to make other calls, such as POST calls to refresh the token.

Please have a look and let me know if you have any questions!

David B.
Tier II API Support Engineer