ASP.Net Post Attributes

Hi All

I am clearly missing something here. I am trying to send calls to an API for a product called ServiceDeskPlus.

The operation name "ADD_REQUEST"  should be sent as a "POST attribute" with key "OPERATION_NAME".

The technician key should be sent as a "POST attribute" with key "TECHNICIAN_KEY".

Input is an XML string sent as a "POST attribute" with key "INPUT_DATA".

The full documentation page is found here.

The code I am using to create the Post Attributes is:
public void CreateSupportDeskItem(ref SupportItem supportItem, string clientCode = "")
            string destinationUrl = Properties.Settings.Default.ServiceDeskEndPoint;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(destinationUrl);

            string group = Properties.Settings.Default.ServiceDeskGroup;
            string status = Properties.Settings.Default.ServiceDeskStatus;
            string service = Properties.Settings.Default.ServiceDeskService;
            string technicianKey = Properties.Settings.Default.ServiceDeskAPIKey;

            string requestXml;

            if (string.IsNullOrEmpty(clientCode))
                requestXml = GenerateRequestXml(supportItem,
                                         group, status, service);
                requestXml = GenerateRequestXml(supportItem, group, status, service, clientCode);

            NameValueCollection outgoingQueryString = HttpUtility.ParseQueryString(String.Empty);
            outgoingQueryString.Add("OPERATION_NAME", "ADD_REQUEST");
            outgoingQueryString.Add("TECHNICIAN_KEY", technicianKey);
            outgoingQueryString.Add("INPUT_DATA", requestXml);
            string postData = outgoingQueryString.ToString();

            byte[] bytes;
            bytes = Encoding.ASCII.GetBytes(postData);
            request.ContentType = "application/x-www-form-urlencoded"; 
            request.ContentLength = bytes.Length;
            request.Method = "POST";

            Stream dataStream = request.GetRequestStream();
            dataStream.Write(bytes, 0, bytes.Length);

            HttpWebResponse response;
            response = (HttpWebResponse)request.GetResponse();
            if (response.StatusCode == HttpStatusCode.OK)
                Stream responseStream = response.GetResponseStream();
                string responseStr = new StreamReader(responseStream).ReadToEnd();
                int ticketId = ParseSupportDeskID(responseStr);

                supportItem.RequestID = ticketId;
                throw new NotImplementedException("The Http Web Response failed!");


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However when I make the call, the response I get is "No operation name specified in request". So clearly I have not correctly set the "Post Attribute".

Please can someone advise.

maaknplanSenior DeveloperAsked:
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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
i usually do some debugging using Web Request Tool such as Postman first to determine what parameters to be set before I really go in for the coding part.

you can download Postman and do the testing with URL = destinationUrl


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maaknplanSenior DeveloperAuthor Commented:
Thanks for this. It turns out the Post attributes were being correctly set, but the XML going into "INPUT_DATA" was missing the details node. Once I used PostMan I picked up the error immediately. I recommend PostMan for anyone working with any kind of a service.
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