Passing client credentials to a Web service using Windows 
authentication 

Sometimes a Web Service is under a configuration that 
requires Windows Authentication. It is not a problem 
for .NET, all you need to do is set your environment to 
send the client credentials. 
1.	First Create a Reference to a Web Service:


 


To do that just go to the references of your project and 
add a Web Reference. Type the URL of your web service. This 
will find your Web Service Reference and you can update it. 
This will generate the proxy code you need to access your 
webservice. 

If you try to call your webservice with a call like: 

WebReference.MyService pService = new 
WebReference.MyService (); 
pService.doStuff("A", "B"); 

You’ll get a HTTP 404 forbidden access exception. 

Now to send the user and password to call your service 
write some code like the following: 

WebReference.MyService pService = new 
WebReference.MyService (); 
pService.Credentials = new System.Net.NetworkCredential
("user", "password"); 
pService.doStuff("A", "B"); 

You can also send the domain name as part of the parameter 
to the NetworkCredential class: 

pService.Credentials = new System.Net.NetworkCredential
("user", "password","domain"); 

It will be even better to have your user and password not 
in your code but in the configuration file for your 
program. You can then use the AppSettings class to access 
those properties.