Me myself faced such case and tried to find the proper way to do it. So, I found that the reference I created to the web service has a property called "Credentials" through which I can provide my credentials.
But, when I tried my code, I found that my request is still not authenticated. After further investigations, I decided to search msdn for all properties related to the authentication topic to see if I am missing something.
So, I found that my reference class to my web service inherits from "System.Web.Services.Protocols.SoapHttpClientProtocol" class. So, by the aid of google, I found some interesting results. It is not enough to set the "Credentials" property of my reference. I have three more properties to set to achieve what I want, so lets see some code.
//Creating a reference to your WCF web service MyCustomService service = new MyCustomService(); /* AllowAutoRedirect is "true" to automatically redirect the client to follow server redirects; otherwise, "false". The default is "false". If you send authentication information, such as a user name and password, you do not want to enable the server to redirect, because this can compromise security */ service.AllowAutoRedirect = false; /* PreAuthenticate is "true" to pre-authenticate the request; otherwise, "false". The default is "false". When PreAuthenticate is false, a request is made to the Web service method without initially attempting to authenticate the user. If the Web service allows anonymous access, then the Web service method is executed, else, a 401 HTTP return code is sent back. */ service.PreAuthenticate = true; /* UseDefaultCredentials is "true" if the Credentials property is set to the value of the CredentialCache.DefaultCredentials property; otherwise, "false". */ service.UseDefaultCredentials = false; //Providing credentials service.Credentials = new NetworkCredential("userName", "password", "domain");
That's it, after setting the four properties "AllowAutoRedirect", "PreAuthenticate", "UseDefaultCredentials" and "Credentials" properly I could get my call to my web service authenticated.