Hi guys,

Hoping someone can help me with this.

I've followed this post: http://www.liquidint.com/blog/extending-umbraco-contour-campaign-monitor-integration/ and also the contour development documentation and a few other posts.

I'm trying to integrate campaign monitor with contour but I'm stuck.

I have this class which gets a list of lists from campaign monitor and this is working correctly because I can create a campaign monitor prevalue source in contour and it contains my campaign monitor lists:

namespace MyApp.WebApp.Utils
{
    public class CampaignMonitorListsFieldSettingsType : FieldSettingType
    {
        private CheckBoxList cbl = new CheckBoxList();
        private string _val = string.Empty;

        public override WebControl RenderControl(Umbraco.Forms.Core.Attributes.Setting setting, Form form)
        {
            cbl.ID = setting.GetName();
            cbl.RepeatLayout = RepeatLayout.Flow;
            cbl.CssClass = "cml";
            string apiKey = ConfigurationManager.AppSettings["CampaignMonitorAPIKey"] as string;
            string clientId = ConfigurationManager.AppSettings["CampaignMonitorClientID"] as string;
            AuthenticationDetails authDetails = new ApiKeyAuthenticationDetails(apiKey);
            Client client = new Client(authDetails, clientId);
            IEnumerable<BasicList> lists = client.Lists();
            ListItem li;
            foreach (BasicList list in lists)
            {
                li = new ListItem(list.Name, list.ListID);
                cbl.Items.Add(li);
            }
            IEnumerable<string> vals = _val.Split(',');
            foreach (string v in vals)
            {
                ListItem selLi = cbl.Items.FindByValue(v);
                if (selLi != null)
                {
                    selLi.Selected = true;
                }
            }

            return cbl;
        }
    }
}

When I select any of the lists in the prevalue source and click save, I am getting an error which indicates that my list is empty:

namespace MyApp.WebApp.Utils
{
    public class CampaignMonitorExtension : FieldPreValueSourceType
    {
        public CampaignMonitorExtension()
        {
            this.Id = new Guid("9fd33370-2fb6-4fbb-88e2-3d14d2e65772");
            this.Name = "Campaign Monitor Mailing Lists";
            this.Description = "List of mailing lists available within campaign monitor";
        }


        [Umbraco.Forms.Core.Attributes.Setting("ListsToInclude",
        description = "The selected lists to which the user can subscribe",
        control = "MyApp.WebApp.Utils.CampaignMonitorListsFieldSettingsType",
        assembly = "MyApp.WebApp")]
        public String ListsToInclude { get; set; }


        public override List<PreValue> GetPreValues(Field field)
        {

            List<PreValue> pvs = new List<PreValue>();
            string apiKey = ConfigurationManager.AppSettings["CampaignMonitorAPIKey"] as string;
            string clientId = ConfigurationManager.AppSettings["CampaignMonitorClientID"] as string;
            AuthenticationDetails authDetails = new ApiKeyAuthenticationDetails(apiKey);
            Client client = new Client(authDetails, clientId);
            IEnumerable<BasicList> lists = client.Lists();
            PreValue preValue;
            IEnumerable<string> vals = ListsToInclude.Split(',');
            foreach (string v in vals)
            {
                BasicList l = lists.FirstOrDefault(s => s.ListID == v);
                preValue = new PreValue();
                preValue.Value = l.Name;
                preValue.Id = l.ListID;
                pvs.Add(preValue);
            }
            return pvs;
        }

        public override List<Exception> ValidateSettings()
        {
            List<Exception> exs = new List<Exception>();
            if (string.IsNullOrEmpty(ListsToInclude))
            {
                exs.Add(new Exception("Lists To Include is Empty"));
            }
            return exs;
        }
    }
 }

Stepping through the code shows that ListsToInclude and field parameters are both null.

Since the rendercontrol method returns a checkboxlist, I have tried changing ListsToInclude to CheckboxList instead of string but this has no impact.

I'm sure this will be something small/silly because this is a first attempt with extending contour for me, but the code DOES seem to make sense so I can't figure out what's wrong.

Any help will be very much appreciated.

Richard