Adding subscribers to a list in Mail Chimp 3.0 in KENTICO

Hi Khoa,

Please try below code, it should work fine.

 JavaScriptSerializer serializer = new JavaScriptSerializer();
            var info = new Info() { email_address = "myemail@gmail.com", status = "subscribed", apikey = "6d43f4b7e3b8271c2508ac6d3a0fc2ce-us19" };
            var infoJson = serializer.Serialize(info);

            string url = @"https://us19.api.mailchimp.com/3.0/lists/439db5911d/members";
            HttpClient client = new HttpClient();
            client.DefaultRequestHeaders.Clear();

            client.BaseAddress = new Uri(url);
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            var user = Convert.ToBase64String(Encoding.UTF8.GetBytes("anystring:6d43f4b7e3b8271c2508ac6d3a0fc2ce-us19"));
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", user);
            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post,url);
            request.Content = new StringContent(infoJson,
                                                Encoding.UTF8,
                                                "application/json");

            var res = client.SendAsync(request).Result;

There was an issue in setting up the content type in default request header. You should set the encoding with content type in request message or use WebRequest instead of HttpClient which is more easier to use.

Hi Samira Grazitti,

I had tried your code and see something change.

For new member add to list, it work good.( Status code 200)

But for email already exist, it show 400 but no message like 'User already exist'

Here is code return when user exist:

StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { X-Request-Id: 82c401c6-cbcd-48f3-ac2c-88715b369a3a Link: ; rel="describedBy" Connection: close Date: Mon, 06 Aug 2018 10:58:56 GMT Set-Cookie: _AVESTA_ENVIRONMENT=prod; path=/ Set-Cookie: _mcid=1.c34b5b11887685c962e4fd5c589659d6; expires=Tue, 06-Aug-2019 10:58:56 GMT; Max-Age=31536000; path=/; domain=.mailchimp.com Server: openresty Content-Length: 273 Content-Type: application/problem+json; charset=utf-8 }

Hi,
Try to use MailChimp.Net library, it's pretty easy. The library has all needed methods to manage subscribers/lists/etc. And before adding subscriber, you can call Members.Exist/ExistAsync method to check if a record exists. Another advantage of the library, you don't need to worry about building requests with correct headers.

Thank you Samira Grazitti, it work perfectly !!

Hi Anton Grekhovodov,

MailChimp library look goods, but you can show me how to control status code if can add subscriber or not.

I had make a successfully add member to list, but it return nothing.

Hi,
The method from the library doesn't returns a status code, it returns object of Member type. Example, how to use the library:

var mailChimpManager = new MailChimpManager(apiKey);
var subscriberExists = await mailChimpManager.Members.ExistsAsync(listId, email);
if (subscriberExists)
{
   //return if necessary;
}

//create a new subscriber
var newMember = new Member() {EmailAddress = email, Status = Status.Subscribed};
// to add custom fields use
// newMember.MergeFields.Add(Key, Value);

//method returns Member object
var newMemberResult = await mailChimpManager.Members.AddOrUpdateAsync(listId, newMember);
if (newMemberResult != null && !string.IsNullOrEmpty(newMember.Id))
{
    //subscriber has been added
}