c# - 自托管 WCF 服务

Question

我正在考虑在我的应用程序中创建一个自托管的 WCF 服务。我正在尝试按照 Microsoft 站点上的示例进行操作 http://msdn.microsoft.com/en-us/library/ms731758(v=vs.100).aspx但我遇到了问题。

当程序运行时，我可以进入网页，它说我可以运行 svcutil.exe 来生成客户端类，或者当我进入 WCF 测试客户端时，教程说我收到错误

Service metadata may not be accessible. Make sure your service is running and exposing metadata.

从 svcutil.exe 我得到以下错误:

C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC>svcutil http://localhost:
6525/hello
Microsoft (R) Service Model Metadata Tool
[Microsoft (R) Windows (R) Communication Foundation, Version 4.0.30319.1]
Copyright (c) Microsoft Corporation.  All rights reserved.

Attempting to download metadata from 'http://localhost:6525/hello' using WS-Meta
data Exchange or DISCO.
Generating files...
Warning: No code was generated.
If you were trying to generate a client, this could be because the metadata docu
ments did not contain any valid contracts or services
or because all contracts/services were discovered to exist in /reference assembl
ies. Verify that you passed all the metadata documents to the tool.

Warning: If you would like to generate data contracts from schemas make sure to
use the /dataContractOnly option.

下面是我的 WCF 应用程序的代码

public interface IHelloWorldService
        {
            [OperationContract]
            string SayHello(string firstName, string lastName);
        }

        static void Main(string[] args)
        {
            Uri baseAddress = new Uri("http://localhost:6525/hello");

            using (ServiceHost host = new ServiceHost(typeof(HelloWorldService), baseAddress))
            {
                ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
                smb.HttpGetEnabled = true;
                smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
                host.Description.Behaviors.Add(smb);

                host.Open();

                Console.WriteLine("The service is ready at: {0}", baseAddress);
                Console.WriteLine("Press <Enter> to stop the service");
                Console.ReadLine();
                host.Close();

            }
        }

        public class HelloWorldService : IHelloWorldService
        {
            public string SayHello(string firstName, string lastName)
            {
                return string.Format("Hello {0} {1}", firstName, lastName);
            }
        }

感谢您提供的任何帮助

Answer 1

乍一看很难找出问题所在，但当我测试你的代码时，我发现你的代码中缺少某些东西。你忘了向客户公开你的契约(Contract)。您的接口(interface)缺少 [ServiceContract] 属性。下面将解决您的问题，希望对您有所帮助。

[ServiceContract]
public interface IHelloWorldService
{
    [OperationContract]
    string SayHello(string firstName, string lastName);
}