CODEWITHSUNDEEP
c#jsonwcf
Rodrigo Zimmermann
Rodrigo Zimmermann

Reputation: 157

C# WCF JSON Return String

I Create a simple WCF service and he works fine. The configuration are below The interface have this configuration

   [OperationContract]
    [WebInvoke(Method = "GET",
                  ResponseFormat = WebMessageFormat.Json,
                  BodyStyle = WebMessageBodyStyle.Bare,
                  UriTemplate = "checkSymbolExistJson/{pSymbol}")]
     string checkSymbolExistJson(string pSymbol);

The implementation is this

         public string checkSymbolExistJson(string pSymbol)
      {
            Person p    = new Person();
            p.name      = pSymbol;
            p.age       = 15;

        string json = JsonConvert.SerializeObject(p);
        return json;
      }

if I enter URL in browser "http://localhost/MetaTraderWcf/rzManageQuotes.svc/checkSymbolExistJson/testename" in brower I Get this result in Browser

"{\"name\":\"testename\",\"age\":15}"

After I make a win 32 application to get http result of this WCF service. I use this code to read a HTML page

        public string readUrl(string pUrl)
    {
        WebClient client = new WebClient { Encoding = System.Text.Encoding.UTF8 };
        return client.DownloadString(pUrl);
    }

I use this code to read a JSON dinamic TAG

       private void button2_Click(object sender, EventArgs e)
    {

         string tmpToken = readUrl(url.Text);
        // string tmpToken = "{\"name\":\"testename\",\"age\":15}";
        JToken token = JObject.Parse(tmpToken);

              string page = (string)token.SelectToken("name");
              jSONResult.Text = page;

    }

if I Runing code above with fixed code below

string tmpToken = "{\"name\":\"testename\",\"age\":15}";

The result is correct and I get result as "testename".

But when I Debug the read a Html page I receive tha value of tmpToken with this string

"\"{\\"name\\":\\"testename\\",\\"age\\":15}\""

And I get a error when I read dinamic value of name

An unhandled exception of type 'Newtonsoft.Json.JsonReaderException' occurred in Newtonsoft.Json.dll

Additional information: Error reading JObject from JsonReader. Current JsonReader item is not an object: String. Path '', line 1, position 37.

If I change interface to return a XML page like this code

       [OperationContract]
     [WebInvoke(Method = "GET",
                  ResponseFormat = WebMessageFormat.Xml,
                  BodyStyle = WebMessageBodyStyle.Bare,
                  UriTemplate = "checkSymbolExistJson/{pSymbol}")]
     string checkSymbolExistJson(string pSymbol);

I get the follow result in browser

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">{"name":"testename","age":15}</string>

And I get Read JSON value of name correct after remove tag from XML result.

The Question is There is some way of read a string in pure JSON format in c# like a read in a Browser format like this

{"name":"testename","age":15}

and not like this format

"\"{\\"name\\":\\"testename\\",\\"age\\":15}\""

Upvotes: 1

Views: 2081

Answers (1)

Mohammad
Mohammad

Reputation: 2764

there is a simple solution for that. just return stream except string. 

     public stream checkSymbolExistJson(string pSymbol)
  {
        Person p    = new Person();
        p.name      = pSymbol;
        p.age       = 15;

    string json = JsonConvert.SerializeObject(p);
    return new MemoryStream(Encoding.UTF8.GetBytes(json));
  }

or i suggest use web API instead WCF.

Upvotes: 3

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