Boman.Biz

Today I had to call an old ASMX web service using the newer WCF infrastructure and bumped into a problem of passing through the Default Windows credentials.  In the olden days I would have done something like (in VB.NET):

Dim proxy As New WebService.ProxyClass
proxy.Credentials = System.Net.CredentialCache.DefaultCredentials
proxy.PreAuthenticate = True

and then hit it hard, however in the later versions of Visual Studio the equivalent is (in C#):

//Call web service the old ASMX way using WCF
System.ServiceModel.BasicHttpBinding basicHttpBinding = 
          new System.ServiceModel.BasicHttpBinding();
basicHttpBinding.Security.Mode = 
          System.ServiceModel.BasicHttpSecurityMode.TransportCredentialOnly;
basicHttpBinding.Security.Transport.ClientCredentialType = 
          System.ServiceModel.HttpClientCredentialType.Windows;
myService.myServiceSoapClient svcmyService = 
          new mySharePointSync.myService.myServiceSoapClient(basicHttpBinding,  
                    new System.ServiceModel.EndpointAddress("http://localhost:6969/SomeOldService.asmx"));
svcmyService.ClientCredentials.Windows.AllowedImpersonationLevel = 
          System.Security.Principal.TokenImpersonationLevel.Impersonation;
svcmyService.ClientCredentials.Windows.AllowNtlm = true;
svcmyService.ChannelFactory.Credentials.Windows.ClientCredential = 
          System.Net.CredentialCache.DefaultNetworkCredentials;

It might be handy next time you have to do it :)