根据您的描述，我认为您可以使用 WCF 消息检查器。在客户端发送消息之前。我们可以自定义消息正文。
https://docs.microsoft.com/en-us/dotnet/framework/wcf/samples/message-inspectors
我做了一个demo，希望对你有用。
服务器端。
class Program
{
static void Main(string[] args)
{
Uri uri = new Uri("http://localhost:1500");
BasicHttpBinding binding = new BasicHttpBinding();
binding.TransferMode = TransferMode.Buffered;
binding.Security.Mode = BasicHttpSecurityMode.None;
ServiceHost sh = new ServiceHost(typeof(Calculator),uri);
sh.AddServiceEndpoint(typeof(ICalculator), binding, "");
ServiceMetadataBehavior smb;
smb = sh.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)
{
smb = new ServiceMetadataBehavior();
//smb.HttpGetEnabled = true;
sh.Description.Behaviors.Add(smb);
}
Binding mexbinding = MetadataExchangeBindings.CreateMexHttpBinding();
sh.AddServiceEndpoint(typeof(IMetadataExchange), mexbinding, "MEX");
sh.Open();
Console.Write("Service is ready....");
Console.ReadLine();
sh.Close();
}
}
[ServiceContract]
public interface ICalculator
{
[OperationContract,WebGet]
double Add(double a, double b);
}
public class Calculator : ICalculator
{
public double Add(double a, double b)
{
return a + b;
}
}
客户。
class Program
{
static void Main(string[] args)
{
ServiceReference2.CalculatorClient client = new ServiceReference2.CalculatorClient();
try
{
var result = client.Add(34, 20);
Console.WriteLine(result);
}
catch (Exception)
{
throw;
}
}
}
public class ClientMessageLogger : IClientMessageInspector
{
public void AfterReceiveReply(ref Message reply, object correlationState)
{
string result = $"server reply message:\n{reply}\n";
Console.WriteLine(result);
}
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
XmlDocument doc = new XmlDocument();
MemoryStream ms = new MemoryStream();
XmlWriter writer = XmlWriter.Create(ms);
request.WriteMessage(writer);
writer.Flush();
ms.Position = 0;
doc.Load(ms);
ChangeMessage(doc);
ms.SetLength(0);
writer = XmlWriter.Create(ms);
doc.WriteTo(writer);
writer.Flush();
ms.Position = 0;
XmlReader reader = XmlReader.Create(ms);
request = System.ServiceModel.Channels.Message.CreateMessage(reader, int.MaxValue, request.Version);
string result = $"client ready to send message:\n{request}\n";
Console.WriteLine(result);
return null;
}
void ChangeMessage(XmlDocument doc)
{
XmlElement element = (XmlElement)doc.GetElementsByTagName("s:Envelope").Item(0);
if (element != null)
{
element.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema");
element.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
}
}
}
public class CustContractBehaviorAttribute : Attribute, IContractBehavior, IContractBehaviorAttribute
{
public Type TargetContract => typeof(ICalculator);
public void AddBindingParameters(ContractDescription contractDescription, ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
return;
}
public void ApplyClientBehavior(ContractDescription contractDescription, ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.ClientMessageInspectors.Add(new ClientMessageLogger());
}
public void ApplyDispatchBehavior(ContractDescription contractDescription, ServiceEndpoint endpoint, DispatchRuntime dispatchRuntime)
{
return;
}
public void Validate(ContractDescription contractDescription, ServiceEndpoint endpoint)
{
return;
}
}
不要忘记将 CustContract 行为应用到服务接口。
[CustContractBehavior]
public interface ICalculator {
结果。