Challenges encountered while formatting Json strings for WCF service transmission

I need assistance in connecting a JavaScript application to a WCF service. The WCF Service I have includes the following method:

    [OperationContract]
    [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, RequestFormat = WebMessageFormat.Json, UriTemplate = "/ExportToXml")]
    void ExportToXml(List<Span> spans, List<Detection> detections);

    [DataContract]
    public class Detection
    {
       [DataMember]
       public int TID { get; set; }

       [DataMember]
       public double Longitude { get; set; }

       [DataMember]
       public double Latitude { get; set; }

       [DataMember]
       public double Height { get; set; }

       [DataMember]
       public int SN { get; set; }

       [DataMember]
       public string TLine_Name { get; set; }
  }

  [DataContract]
  public class Span
  {
       [DataMember]
       public int SN { get; set; }

       [DataMember]
       public double Longitude { get; set; }

       [DataMember]
       public double Latitude { get; set; }

       [DataMember]
       public string TLine_Name { get; set; }
   }

However, I am struggling to format the JSON data correctly on the client-side to pass into this function using JavaScript. The JSON I prepared appears as follows:

var input = {
              "spans": [{
                  "SN": 1,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "TLine_Name": "Circuit Test 1"
              }, {
                  "SN": 2,
                  "Longitude": 2000000,
                  "Latitude": 2000000,
                  "TLine_Name": "Circuit Test 2"
              }],

              "detections": [{
                  "TID": 1,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "Height": 15,
                  "SN": 1,
                  "TLine_Name": "Circuit Test 1"
              }, {
                  "TID": 2,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "Height": 12,
                  "SN": 1,
                  "TLine_Name": "Circuit Test 1"
              }, {
                  "TID": 3,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "Height": 14,
                  "SN": 1,
                  "TLine_Name": "Circuit Test 1"
              }, {
                  "TID": 4,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "Height": 10,
                  "SN": 2,
                  "TLine_Name": "Circuit Test 2"
              }, {
                  "TID": 5,
                  "Longitude": 1000000,
                  "Latitude": 1000000,
                  "Height": 8,
                  "SN": 2,
                  "TLine_Name": "Circuit Test 2"
              }]
          };

The WCF service is not accepting the provided JSON input structure. Any guidance and support regarding this issue would be greatly appreciated.

Answer №1

It's not the format of the JSON object that is causing issues when sending it to the service on my local machine. There seems to be another underlying problem that needs to be addressed. Providing more information about the client could potentially help in resolving this issue.

While I understand that your client is a JavaScript application, I have successfully sent the JSON object to the service using my C# client. Here is a snippet of the code:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:9001/WCFServices/RestfulService/ExportToXml");
request.ContentType = "text/json";
request.Method = "POST";
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
    // JSON object example
    string json = @"{ ""spans"": [{ ""SN"": 1, ""Longitude"": 1000000,""Latitude"": 1000000,""TLine_Name"": ""Circuit Test 1""}, 
                    {""SN"": 2, ""Longitude"": 2000000, ""Latitude"": 2000000, ""TLine_Name"": ""Circuit Test 2"" }],
                    ""detections"": [{ ""TID"": 1, ""Longitude"": 1000000, ""Latitude"": 1000000, ""Height"": 15,""SN"": 1, ""TLine_Name"": ""Circuit Test 1"" }, 
                                    { ""TID"": 2, ""Longitude"": 1000000, ""Latitude"": 1000000, ""Height"": 12, ""SN"": 1, ""TLine_Name"": ""Circuit Test 1"" },
                                    { ""TID"": 3, ""Longitude"": 1000000, ""Latitude"": 1000000, ""Height"": 14, ""SN"": 1, ""TLine_Name"": ""Circuit Test 1"" }, 
                                    { ""TID"": 4, ""Longitude"": 1000000, ""Latitude"": 1000000, ""Height"": 10, ""SN"": 2, ""TLine_Name"": ""Circuit Test 2"" }, 
                                    { ""TID"": 5, ""Longitude"": 1000000, ""Latitude"": 1000000, ""Height"": 8, ""SN"": 1, ""TLine_Name"": ""Circuit Test 2"" }] }";
   streamWriter.Write(json);
}
WebResponse ws = request.GetResponse();
Encoding enc = System.Text.Encoding.GetEncoding(1252);
StreamReader responseStream = new StreamReader(ws.GetResponseStream());
string response = responseStream.ReadToEnd();
responseStream.Close();

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