Call web service without using web reference. Asp.Net

Introduction

Most application have their own webservice act as a API call for other services. In .NET we can use Web Reference in development environment and .net will automatically generate webservice method in development environment. BUT ins some scenario, you cannot add Web Reference in your solution project. Hence this post is a solution for your problem. 

Code Behind

This code behind can call from method, or button event, or can create class. 

       string result = "";  
       StreamReader resStream = null;  
       HttpWebResponse response = null;        
       try  
       {  
         //set webservice address  
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create("<web service address>");  
         //set webservice method name  
         request.Headers.Add("SOAPAction", "http://tempuri.org/" + "<web service method>");  
         request.ContentType = "text/xml;charset=\"utf-8\"";  
         request.KeepAlive = false;  
         request.Timeout = 300000; // - in millisecond. (5 minit)    
         request.Method = "POST";  
         request.Credentials = CredentialCache.DefaultCredentials;  
         byte[] byteArray = Encoding.ASCII.GetBytes("<data you want to send to webservice>");  
         request.ContentLength = byteArray.Length;  
         Stream s = request.GetRequestStream();  
         s.Write(byteArray, 0, byteArray.Length);  
         s.Dispose();  
         s.Close();  
         response = (HttpWebResponse)request.GetResponse();  
         Encoding enc = System.Text.Encoding.GetEncoding(1252);  
         resStream = new StreamReader(response.GetResponseStream());  
         result = resStream.ReadToEnd(); // read webservice response                
       }  
       catch (Exception ex)  
       {  
         result = ex.Message;  
       }  
       finally  
       {  
         resStream.Dispose();  
         resStream.Close();  
         response.Close();  
       }