Request and Response in C#

Submitted by donbermoy on Tuesday, July 15, 2014 - 21:26.

This is a simple tutorial in C# on how to use the System.Net namespace to send a request and receive a response from a server. Now let's start this tutorial! 1. First we need to import System.Net. This enables us to use the required functions and classes.

using System.Net;

2. This is the code for request. To send a request we first create an object of HTTPWebRequest. HttpWebRequest req = default(HttpWebRequest); We will then have an object equal to a new HTTPWebRequest with the function of '.Create()' while parsing it the server URL. req = HttpWebRequest.Create("http://www.google.com"); 3. This is the code for response. We will create an object to hold the response. This object is the type of HTTPWebResponse. To initialize, have this code: HttpWebResponse res = default(HttpWebResponse); Now, we will set the response object to the request's response. res = req.GetResponse(); From this we can use that response to do things such as get the source of the response in a web page from the request server.

using (System.IO.StreamReader reader = new System.IO.StreamReader(res.GetResponseStream()))
                {
                        MessageBox.Show((string) (reader.ReadToEnd())); //Source
                }
                

Full source code:

using System.Net;
using System.Windows.Forms;
 
 
public class Form1
{
        
        private void Form1_Load(object sender, EventArgs e)
        {
                HttpWebRequest req = default(HttpWebRequest);
                req = HttpWebRequest.Create("http://www.google.com");
                HttpWebResponse res = default(HttpWebResponse);
                res = req.GetResponse();
                using (System.IO.StreamReader reader = new System.IO.StreamReader(res.GetResponseStream()))
                {
                        MessageBox.Show((string) (reader.ReadToEnd())); //Source
                }
                
        }
}

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