WCF Channel Factory身份验证与服务参考的区别

Question

I am consuming a 3rd party https web service in a WCF service using the 2 ways described below.

1. Using Service Reference

    ServiceClient client=new ServiceClient(); client.ClientCredentials.UserName.UserName ="xxx"; client.ClientCredentials.UserName.Password = "pwd"; ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true; ServiceResponse response=client.GetData(); 

2.Using channel factory

  ChannelFactory<IService> client = new ChannelFactory<IService>(binding, address);
  var proxy = client.CreateChannel();
  client.Credentials.UserName.UserName ="xxx";
  client.Credentials.UserName.Password ="pwd";
  ServiceResponse response=client.GetData();

I am able to pass the security credentials using the first approach and i am able to get the respone back from the 3rd party web service.But I am unable to get the response when i use the second approach. I can see that the username,password are added in the security header of the outoing SOAP message with the first approach but not with the second approach.I would be glad if some one can throw some suggestion here about the channel factory approach.

Answer 1

The issue is when you're assigning the credentials - in your current code, you're creating the proxy after you create the factory, and then you assign the credentials to the factory. But that has no effect on the created channel:

ChannelFactory<IService> client = new ChannelFactory<IService>(binding, address);
var proxy = client.CreateChannel();

client.Credentials.UserName.UserName ="xxx";
client.Credentials.UserName.Password ="pwd";

var proxy is a an implementation of IChannel - setting the credentials on the factory ( client ) has no effect on the already created channels - just the ones created later.

Try setting the credentials and then calling CreateChannel() :

ChannelFactory<IService> client = new ChannelFactory<IService>(binding, address);
client.Credentials.UserName.UserName ="xxx";
client.Credentials.UserName.Password ="pwd";

var proxy = client.CreateChannel();
ServiceResponse response=client.GetData();