I am trying to update the contact details.

this.data =JSON.parse(data);
var contactId = this.data.Id;
let userurl = 'https://api.wildapricot.org/v2/Accounts/' + accountid + '/Contacts/' +contactId;

            console.log("efore put call", userDetails);
            console.log("efore put call stringified", JSON.stringify(userDetails));

             let bodyString = JSON.stringify(userDetails); 

            this.http.put(userurl, bodyString, {headers:headers})
              .map(res => <User>(res.json()))
              .subscribe(userAuth => {
                // we've got back the raw data, now generate the core schedule data
                // and save the data for later reference
                this.userData = userAuth;
                console.log('get user details', userAuth);
                resolve(this.userData);
              },
              err => {
                console.log("error", err);
                });
          });

that is my put code.. as your can see I am sending the body text as stringbut this gives me an error.

But when I do the samle as
var bodyString = "Id=33053793&FirstName=test&=";

like this. it works but doing the similar formatting at a form level and also passing values for field values may not be a practical option.

Thanks