HELP! :-) Adding contact via POST returns 400 bad request...Beginner

[glockster]

I'm trying to add a contact from a webform using c#.  I can't tell where my issue(s) is/are regarding my 400 errors.  Any help would be VERY much appreciated.

Here's the code:

protected void go_Click(object sender, EventArgs e)

        {

            // Note: Remember to add using System.Net;

            // Create LoginCreditials

            CredentialCache LoginCredentials = new CredentialCache();

            string UserName = "UserName";

            string APIKey = "GUID";

            string Password = "UserPassword";

            string ContactURI = "https://api.constantcontact.com/ws/customers/" + UserName + "/contacts";

            // Add a new credential for this account

            LoginCredentials.Add(new Uri("https://api.constantcontact.com/ws/customers/" + txtemail.ToString()), "Basic", new NetworkCredential(APIKey + "%" + UserName, Password));

            

            // Create WebRequest

            HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(ContactURI);

            

            // URI for the POST

            // Set Request to be a POST

            Request.Method = "POST";

            

            // Set the ContentType property.

            Request.ContentType = "application/atom+xml";

            

            // Set Request credentials

            Request.Credentials = LoginCredentials;

            

            // Set up XML String for the POST

            // Long string with quotes, use an absolute string with literals string or a StringBuilder

            string XMLData = "";

            XMLData += "<entry xmlns=\"http://www.w3.org/2005/Atom\">";

            XMLData += "<title type=\"text\"></title>";

            //XMLData += "<updated>" + UpdateTimeStamp + "</updated>";

            //XMLData += "<author></author>";

            //XMLData += "<id>data:,none</id>";

            XMLData += "<summary type=\"text\">Contact</summary>";

            XMLData += "<content type=\"application/vnd.ctct+xml\">";

            XMLData += "<Contact xmlns=\"http://ws.constantcontact.com/ns/1.0/\">";

            XMLData += "<EmailAddress>" + txtemail.Text.ToString() + "</EmailAddress>";

            XMLData += "<EmailType>HTML</EmailType>";

            //XMLData += "<FirstName>"&FirstName&"</FirstName>";

            //XMLData += "<LastName>"&LastName&"</LastName>";

            //XMLData += "<PostalCode>"&PostalCode&"</PostalCode>";

            XMLData += "<OptInSource>ACTION_BY_CUSTOMER</OptInSource>";

            XMLData += "<ContactLists>";

            XMLData += "<ContactList id=\"http://api.constantcontact.com/ws/customers//lists/2\"" + " />";

            XMLData += "</ContactLists>";

            XMLData += "</Contact>";

            XMLData += "</content>";

            XMLData += "</entry>";

            

            // Set up the XML Document, application dependant

            

            // Convert XMLData to byteArray for posting

            byte[] byteArray = Encoding.UTF8.GetBytes(XMLData);

            

            // Send POST request

            // Recast the response to HttpWebResponse for easier processing

            // Place in a try block to ensure that any errors are caught

            try

            {

            

                // Set the ContentLength portion of the header

                Request.ContentLength = byteArray.Length;

                string XMLResponse = Convert.ToString(byteArray.Length);

            

                // Create a stream for the POST Request

                // Note: Remember to add using System.IO

                Stream streamRequest = Request.GetRequestStream();

            

                // Write the data to the stream.

                streamRequest.Write(byteArray, 0, byteArray.Length);

                streamRequest.Close();

                HttpWebResponse Response = (HttpWebResponse)Request.GetResponse();

            

                // Process the Response as needed

                // This is a generic StreamReader to read the entire response in

                // You can recast this as any type of stream derivative

            

                StreamReader Reader = new StreamReader(Response.GetResponseStream());

            

                // Read the entire XML response to a string

                // Note there may not be a XML response for a successful POST

                XMLResponse += Response.StatusCode + " " + Response.StatusDescription + " " + Reader.ReadToEnd();

            

                // Close Reader

                Reader.Close();

            

                // Close the response to free up the system resources

                Response.Close();

            

                //return XMLResponse;

            }

            catch (WebException err)

            {

                // Get the web exception type and response code

                //return err.ToString();

            }

        }

Thanks in Advance!!!!

Glockster.

[DaveBerard]

Hi Glockster,

You are commenting out three required lines in your XML:

            //XMLData += "<updated>" + UpdateTimeStamp + "</updated>";

            //XMLData += "<author></author>";

            //XMLData += "<id>data:,none</id>";

Not including the proper fields in your XML will return a 400 error message.  For more information on the minimal fields required for Creates and Updates, you can look here at our Contacts Collection documentation.

I noticed another minor problem in your LoginCredential.Add() statement.  The URI you add should be the Account Base URI.  You would want to use the Username, not the email:

LoginCredentials.Add(new Uri("https://api.constantcontact.com/ws/customers/" + txtemail.ToString()), "Basic", new NetworkCredential(APIKey + "%" + UserName, Password));

Should be:

LoginCredentials.Add(new Uri("https://api.constantcontact.com/ws/customers/" + UserName), "Basic", new NetworkCredential(APIKey + "%" + UserName, Password));