问题描述

WCF 中为什么OperationContext.Current为空?

照着教程写了个例子但是调试的时候OperationContext.Current为空报错请问是什么原因呢?代码如下:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.ServiceModel;using System.IdentityModel;using System.Runtime.Serialization;using System.Data;namespace WCFStudy{    [ServiceContract]    public interface IEchoClaims    {        [OperationContract]        List<string> Echo();    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.ServiceModel;using System.IdentityModel;using System.IdentityModel.Claims;using System.Runtime.Serialization;using System.Data;namespace WCFStudy{    public class EchoClaims : IEchoClaims    {        public List<string> Echo()        {            List<string> claims = new List<string>();             '// 此处为报错结点OperationContext.Current为空!!!!!'             foreach (ClaimSet set in OperationContext.Current.ServiceSecurityContext.AuthorizationContext.ClaimSets)            {                foreach (Claim claim in set)                {                    claims.Add(string.Format(""{0} - {1} - {2}"" claim.ClaimType claim.Resource.ToString() claim.Right));                }            }            return claims;        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.ServiceModel;using System.IdentityModel;using System.Runtime.Serialization;using System.Data;namespace WCFStudy{    class Program    {        static void Main(string[] args)        {            ServiceHost host = new ServiceHost(typeof(EchoClaims) new Uri(""http://localhost:8733""));            try            {                host.Open();                Console.WriteLine(""Service running..."");                Console.WriteLine(""Press a key to quit"");                Console.ReadKey();            }            finally            {                host.Close();            }        }    }}

<?xml version=""1.0"" encoding=""utf-8"" ?><configuration>    <startup>         <supportedRuntime version=""v4.0"" sku="".NETFrameworkVersion=v4.5"" />    </startup>  <system.serviceModel>    <services>      <service name=""WCFStudy.EchoClaims""                behaviorConfiguration=""echoClaimsBehavior"">        <endpoint address=""EchoClaims""                   contract=""WCFStudy.IEchoClaims""                   binding=""wsHttpBinding""                   bindingConfiguration=""echoClaimsBinding"" />      </service>    </services>    <bindings>      <wsHttpBinding>        <binding name=""echoClaimsBinding"">          <security mode=""Message"">            <message clientCredentialType=""UserName""                      negotiateServiceCredential=""true""/>          </security>        </binding>      </wsHttpBinding>    </bindings>    <behaviors>      <serviceBehaviors>        <behavior name=""echoClaimsBehavior"">          <serviceCredentials>            <serviceCertificate findValue=""CN=WCFServer""                                 storeLocation=""LocalMachine""                                 storeName=""My""                                 x509FindType=""FindBySubjectDistinguishedName""/>            <userNameAuthentication userNamePasswordValidationMode=""Windows""></userNameAuthentication>          </serviceCredentials>          <serviceMetadata httpGetEnabled=""true""/>        </behavior>      </serviceBehaviors>          </behaviors>  </system.serviceModel></configuration>