The request failed with HTTP status 401: Unauthorized

问题

I have a .NET 2.0 website (VB) running in my IIS6 (XP Pro SP2) and a .NET 3.5 (configured as .NET2 under IIS's ASP.NET tab, of course) hosting an ASMX web service.

In Chrome, I can call the ASMX and invoke the web methods successfully. However, in calling the web methods in code, from the .NET 2.0 website I get:

The request failed with HTTP status 401: Unauthorized.

How do I get around this?

回答1:

You need to set the credentials in you application when you initialise the webService object.

Something like webService.UseDefaultCredentials = true

This will set the credentials of the request to the current user executing the application.

回答2:

In IIS 7, enable anonymous authentication and you should be able to debug.

回答3:

webService.UseDefaultCredentials = true

This worked for me.

回答4:

you can use this:

webservice.UseDefaultCredentials = true;

if does not work, use the below code instead of the code above

webservice.Credentials = new NetworkCredential("userName", "password", "domain");
webservice.PreAuthenticate = true;

note: the username Password and domain is the user credential of the user that access to webservice

so make sure that user have permission to access to web service

maybe the user is the windows user

and you can get the domain from: right click in "MyComputer" and properties the domain is the Computer name or Workgroup

回答5:

im am test this way:

CheckListService.CheckList chkSrvice = new CheckListService.CheckList() {
    UseDefaultCredentials = true };

来源：https://stackoverflow.com/questions/3282780/the-request-failed-with-http-status-401-unauthorized