need help in rest services urgent plz RSS

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  Anu_sha

  Member

  85 Points

  36 Posts

  need help in rest services urgent plz

  Feb 27, 2012 07:05 PM|LINK

   hi all,

  iam trying to implement rest services. i do not use WCF for now.

  have a webservice like this ---- mathServie.asmx

  [ WebMethod]

     public int addition(int num1, int num2)

          {  eturn (num1 + num2);  }

   

  calling from the .cs page:

  
  protected void Button1_Click(object sender, EventArgs e)

          {           

  //create a request                       

    HttpWebRequest request = WebRequest.Create("http://localhost:51716/WebServices/MyMathService.asmx/addition") as HttpWebRequest;

    //make a string builder with params we need to send  as i do not know  how to send params in url

             StringBuilder sbParams = new StringBuilder();

              sbParams.Append("12");

              sbParams.Append("5");            

   

  //Encode the parameters as form data:

    byte[] dataToSend = UTF8Encoding.UTF8.GetBytes(sbParams.ToString());

              request.ContentLength = dataToSend.Length;

  // Pick up the response:

          using (HttpWebResponse resp = request.GetResponse() as HttpWebResponse)

              { StreamReader reader =  new StreamReader(resp.GetResponseStream());

                  Label3.Text = reader.ReadToEnd();

              }

   

  i know my code is wrong coz it just getting stream but not invoking anuthing. i guess i need to use xmlreader instead of stream reader.

  or iam wrong that rest services showld be writen differnt way , not the regular webservice way.

   

  plz provide the correct code for above example to work. no WCF plz

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  kushalrdalal

  Contributor

  7200 Points

  1288 Posts

  Re: need help in rest services urgent plz

  Feb 27, 2012 07:43 PM|LINK

  For quick find out try to use fiddler and check what is the response you are getting back.

  Please 'Mark as Answer' if this post helps you.
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  • Marked as answer by Steven Cheng - MSFT on Mar 06, 2012 04:00 AM
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  Steven Cheng...

  Contributor

  4219 Points

  548 Posts

  Microsoft

  Moderator

  Re: need help in rest services urgent plz

  Mar 01, 2012 05:40 AM|LINK

  Hi Anu_sha,
  
  Seems you have not supplied the data to send in the HTTP POST request. You need to first get the RequestStream from HttpWebRequest, write in your data to send. And then, Get the response from HttpWebRequest and read out the response data from it. Here is a simple example for your reference:

  #service method

  [WebMethod]        public int Add(int lv, int rv)        {            return lv + rv;        }

   

  #console client(use webrequest)

  private static void CallSimpleWebServiceWithHTTPPOST()
          {
              var request = (HttpWebRequest)WebRequest.Create("http://localhost:52452/TestWebService.asmx/Add");
  
              request.Method = "POST";
              request.ContentType = "application/x-www-form-urlencoded";
  
              using (var sw = new StreamWriter(request.GetRequestStream()))
              {
                  sw.Write(
                      string.Format("lv={0}&rv={1}",
                      3,
                      5
                      )
                  );
              }
  
              var response = (HttpWebResponse)request.GetResponse();
  
              using (var sr = new StreamReader(response.GetResponseStream()))
              {
                  Console.WriteLine(sr.ReadToEnd());
              }
  
  
          }

   

  BTw, I strongly recommend that you start using WCF to build REST service instead of the ASMX webservice if possible :)
  
  

  #WCF Web HTTP Programming Model Overview h
  ttp://msdn.microsoft.com/en-us/library/bb412172.aspx

  #WCF REST Service Template 40(CS)
  http://visualstudiogallery.msdn.microsoft.com/fbc7e5c1-a0d2-41bd-9d7b-e54c845394cd

   

  #Consuming WCF 4.0 REST Service in Windows Phone 7
  http://www.dotnetcurry.com/ShowArticle.aspx?ID=501

  #WCF Rest Services for Windows Phone
  http://ganshani.com/2011/08/14/wcf-rest-services-for-windows-phone-2/

  Please mark the replies as answers if they help or unmark if not.
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