C＃，WebRequest.Create（String URI）返回null

Question

I am trying to create a WebRequest to fetch data. However, things aren't working out because for some reason I cannot create requests because WebRequest.Create() returns a null object.

My code is as follows:

WebRequest.RegisterPrefix("http://", WebRequestCreator.BrowserHttp);
WebRequest test = WebRequest.Create("http://www.google.com");

When I step through, after the second line, test is always null - no exceptions thrown.

I have no idea why a null object is returned. What are possible reasons for this behaviour?

Answer 1

My feeling is that the first line is not necessary. Try with

WebRequest test = WebRequest.Create("http://www.google.com");

Answer 2

 you can use following instead...

WebClient client = new WebClient();
client.Encoding = System.Text.Encoding.UTF8;// GetEncoding(1252);
UrlContent =client.DownloadString(url);

Answer 3

I don't recall such issue while using Silverlight (or developing Moonlight ;-). Maybe something else was already registered ?

Anyway you should be able to use:

WebRequestCreator.BrowserHttp.Create (new Uri ("http://www.google.com"));

to get the same result, ie ensuring a WebRequest instance was created using the browser HTTP stack.