WebRequest.Proxy Property (System.Net)

WebRequest.Proxy Property (System.Net)

The following example displays the current network proxy address and allows the user to assign a new network proxy address and port number.

C#

C++

VB

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			// Create a new request to the mentioned URL.				
			WebRequest myWebRequest=WebRequest.Create("http://www.contoso.com");

			WebProxy myProxy=new WebProxy();
			// Obtain the Proxy Prperty of the  Default browser.  
			myProxy=(WebProxy)myWebRequest.Proxy;

			// Print myProxy address to the console.
			Console.WriteLine("\nThe actual default Proxy settings are {0}",myProxy.Address);
         try
			{
				Console.WriteLine("\nPlease enter the new Proxy Address to be set ");
				Console.WriteLine("The format of the address should be http://proxyUriAddress:portaddress");
				Console.WriteLine("Example:http://proxyadress.com:8080");
				string proxyAddress;
				proxyAddress =Console.ReadLine();

				if(proxyAddress.Length==0)
				{
					myWebRequest.Proxy=myProxy;
				}
				else
				{
					Console.WriteLine("\nPlease enter the Credentials");
					Console.WriteLine("Username:");
					string username;
					username =Console.ReadLine();
					Console.WriteLine("\nPassword:");
					string password;
					password =Console.ReadLine();

					// Create a new Uri object.
					Uri newUri=new Uri(proxyAddress);

					// Associate the new Uri object to the myProxy object.
					myProxy.Address=newUri;

					// Create a NetworkCredential object and is assign to the Credentials property of the Proxy object.
					myProxy.Credentials=new NetworkCredential(username,password);
					myWebRequest.Proxy=myProxy;
				}
				Console.WriteLine("\nThe Address of the  new Proxy settings are {0}",myProxy.Address);
				WebResponse myWebResponse=myWebRequest.GetResponse();

				// Print the  HTML contents of the page to the console.
				Stream streamResponse=myWebResponse.GetResponseStream();
				StreamReader streamRead = new StreamReader( streamResponse );
				Char[] readBuff = new Char[256];
				int count = streamRead.Read( readBuff, 0, 256 );
				Console.WriteLine("\nThe contents of the Html pages are :");	
				while (count > 0) 
				{
					String outputData = new String(readBuff, 0, count);
					Console.Write(outputData);
					count = streamRead.Read(readBuff, 0, 256);
				}

				// Close the Stream object.
				streamResponse.Close();
				streamRead.Close();

				// Release the HttpWebResponse Resource.
				myWebResponse.Close();
				Console.WriteLine("\nPress any key to continue.........");
				Console.Read();				
			}
			catch(UriFormatException e)
			{
				Console.WriteLine("\nUriFormatException is thrown.Message is {0}",e.Message);
				Console.WriteLine("\nThe format of the myProxy address you entered is invalid");
				Console.WriteLine("\nPress any key to continue.........");
				Console.Read();
			}