how to call webservice in xcode

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C#

QUESTION : how to call this webservice in xcode

plz help me as fast as possible.................


i have webservice in asp.net &

it's name is searching.asmx

& my url is http://job-adda.com/searching.asmx

[WebMethod]
   public string searching1(int city,int badroom,Int64 min,Int64 maximum)
   {

       //DataTable dt = new DataTable();
       DataSet ds = new DataSet();
       SqlConnection cn;
       dataacc d;
       try
       {
           StringWriter st = new StringWriter();
           cn = new SqlConnection();
           d = new dataacc();
           cn = d.getconnection();
           SqlCommand cmd = new SqlCommand("searching", cn);
           cmd.CommandType = CommandType.StoredProcedure;
           cmd.Parameters.AddWithValue("@city", city);
           cmd.Parameters.AddWithValue("@badroom", badroom);
           cmd.Parameters.AddWithValue("@min", min);
           cmd.Parameters.AddWithValue("@maximum", maximum);
           cn.Open();
           SqlDataAdapter da = new SqlDataAdapter(cmd);
           da.Fill(ds);
           //new
           ds.WriteXml(st);
           cn.Close();
           //string  s= dt.Rows[0][0].ToString();
           return st.ToString();
       }
       catch (Exception ex)
       {
           throw new Exception(ex.Message);
       }
   }