如果我理解正确，您想在请求的标题上设置用户名和密码.您可以通过将 WCF Extensibility – Message Inspectors 与 IClientMessageInspector.BeforeSendRequest 结合使用来实现.

If i understand correctly, you want to set username and password on the header of the requests. You can achieve by using WCF Extensibility – Message Inspectors with IClientMessageInspector.BeforeSendRequest.

创建一个实现 IClientMessageInspector 的类.在 BeforeSendRequest 方法中，将您的自定义标头添加到传出消息中.

Create a class that implements IClientMessageInspector. In the BeforeSendRequest method, add your custom header to the outgoing message.

请参阅这个 、this 和 这个