Here are the two simplest ways to do it using the bcl. The WebClient ,as simple as it is, is unfortunately a GUI component and therefore extends IDisposable. The HttpWebRequest object is more configurable than the WebClient, for example, you cant set the keep-alive property using the WebClient.
[VB]
using System;
using System.Net;
namespace ConsoleApplication2
{
class Class1
{
static void Main(string[] args)
{
Uri badUri = new Uri("http://www.webservicex.net/WeatherForecast.asewr");
Uri goodUri = new Uri("http://www.webservicex.net/WeatherForecast.aspx?WSDL");
Console.WriteLine("WSDL exists @ {0} = {1}", badUri, WsdlExists1(badUri));
Console.WriteLine("WSDL exists @ {0} = {1}", badUri, WsdlExists2(badUri));
Console.WriteLine("WSDL exists @ {0} = {1}", goodUri, WsdlExists1(goodUri));
Console.WriteLine("WSDL exists @ {0} = {1}", goodUri, WsdlExists2(goodUri));
}
static bool WsdlExists1(Uri uri)
{
using(WebClient wc = new WebClient())
{
try
{
wc.DownloadData(uri.AbsoluteUri);
return true;
}
catch(WebException error)
{
HttpWebResponse response = (HttpWebResponse) error.Response;
switch(response.StatusCode)
{
case HttpStatusCode.NotFound:
return false;
default:
throw;
}
}
}
}
static bool WsdlExists2(Uri uri)
{
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(uri);
try
{
using(HttpWebResponse response = (HttpWebResponse) request.GetResponse());
return true;
}
catch(WebException error)
{
HttpWebResponse response = (HttpWebResponse) error.Response;
switch(response.StatusCode)
{
case HttpStatusCode.NotFound:
return false;
default:
throw;
}
}
}
}
}
[/VB]
