Question

我使用此tuto创建WCF Restful Service 并将其与SQL Server DB连接以获取数据并创建服务并且它可以正常工作，但问题是找不到端点元素这是我的代码的 EventDataContract

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Web;

namespace WCFEventsSchedule
{
    [DataContract]
    public class EventDataContract
    {
        [DataMember]
        public int EventID { get; set; }
        [DataMember]
        public string Text { get; set; }
        [DataMember]
        public DateTime Start_Date { get; set; }
        [DataMember]
        public DateTime End_Date { get; set; }
        [DataMember]
        public int Room_Id { get; set; }
        [DataMember]
        public int User_Id { get; set; }
    }
}

IEventService

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace WCFEventsSchedule
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IEventService" in both code and config file together.
    [ServiceContract]
    public interface IEventService
    {
        [OperationContract]
        [WebInvoke(Method = "GET", RequestFormat = WebMessageFormat.Json,
            ResponseFormat = WebMessageFormat.Json, UriTemplate = "/GetAllEvents/")]
        List<EventDataContract> GetAllEvent();

        [OperationContract]
        [WebGet(RequestFormat = WebMessageFormat.Json,
           ResponseFormat = WebMessageFormat.Json,
           UriTemplate = "/EventDetails/{EventID}")]
        EventDataContract EventDetails(string EventID);
    }
}

EventService.svc

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using WCFEventsSchedule.Model;

namespace WCFEventsSchedule
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "EventService" in code, svc and config file together.
    // NOTE: In order to launch WCF Test Client for testing this service, please select EventService.svc or EventService.svc.cs at the Solution Explorer and start debugging.
    public class EventService : IEventService
    {
        SchedulerEntities se;
        public EventService()  
        {
            se = new SchedulerEntities();  
        }   

        public List<EventDataContract> GetAllEvent()
        {
            var query = (from a in se.Events
                         select a).Distinct();

            List<EventDataContract> EventList = new List<EventDataContract>();

            query.ToList().ForEach(x =>
            {
                EventList.Add(new EventDataContract
                {
                    EventID = x.id,
                    Text = x.text,
                    Start_Date = x.start_date,
                    End_Date = x.end_date,
                    Room_Id = (int) x.room_id,
                    User_Id = (int) x.user_id,
                });
            });
            return EventList;   
        }

        public EventDataContract EventDetails(string EventID)
        {
            EventDataContract even = new EventDataContract();
            try
            {
                var query = (from a in se.Events
                             where a.id.Equals(EventID)
                             select a).Distinct().FirstOrDefault();
                even.EventID = query.id;
                even.Text = query.text;
                even.Start_Date = query.start_date;
                even.End_Date = query.end_date;
                even.Room_Id = (int) query.room_id;
                even.User_Id = (int) query.user_id;  
            }
            catch (Exception ex)
            {
                throw new FaultException<string>(ex.Message);
            }
            return even;   
        }
    }
}

的Web.config

    <?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
  </system.web>
  <system.serviceModel>
    <services>
      <service name="WCFEventsSchedule.EventService" behaviorConfiguration="serviceBehavior" >
        <endpoint address=""
                  binding="webHttpBinding"
                  contract="WCFEventsSchedule.IEventService"
                  behaviorConfiguration="web">

        </endpoint>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="serviceBehavior">
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="web">
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <protocolMapping>
      <add binding="webHttpBinding" scheme="https" />
    </protocolMapping>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true" />
  </system.webServer>
  <connectionStrings>
    <add name="SchedulerEntities" connectionString="metadata=res://*/Model.EventsModel.csdl|res://*/Model.EventsModel.ssdl|res://*/Model.EventsModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=(LocalDB)\v11.0;attachdbfilename=|DataDirectory|\Scheduler.mdf;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>

我的桌面活动

    CREATE TABLE [dbo].[Events] (
    [id]         INT      IDENTITY (1, 1) NOT NULL,
    [text]       TEXT     COLLATE Cyrillic_General_CI_AS NULL,
    [start_date] DATETIME NOT NULL,
    [end_date]   DATETIME NOT NULL,
    [room_id]    INT      NULL,
    [user_id]    INT      NULL,
    CONSTRAINT [PK_Events] PRIMARY KEY CLUSTERED ([id] ASC)
);

以后我将使用WCF在Windows Form Application上显示该数据。

更新错误fater add [ServiceBehavior（IncludeExceptionDetailInFaults = true）]

    Le serveur a rencontré une erreur lors du traitement de la demande. Le message d'exception est 'Un objet qui autorise la valeur Null doit posséder une valeur.'. Pour plus d'informations, consultez les journaux du serveur. La trace de la pile d'exception est :

à System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) à System.Nullable`1.get_Value() à WCFEventsSchedule.EventService.<>c__DisplayClass2.<GetAllEvent>b__1(Events x) dans c:\Users\juste 3al faza\Desktop\Scheduler.MVC5\WCFEventsSchedule\EventService.svc.cs:ligne 31 à System.Collections.Generic.List`1.ForEach(Action`1 action) à WCFEventsSchedule.EventService.GetAllEvent() dans c:\Users\juste 3al faza\Desktop\Scheduler.MVC5\WCFEventsSchedule\EventService.svc.cs:ligne 29 à SyncInvokeGetAllEvent(Object , Object[] , Object[] ) à System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) à System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc) à System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc& rpc) à System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)

Answer 1

我不确定问题是什么，但我怀疑您的.emacs.d/custom/c-settings.el文件存在问题。

阅读this tutorial以获得更清晰的演练。

它清楚地显示了您需要更改web.config的两个部分，以使其正常工作。

Answer 2

每当WCF服务出现任何问题时，都会出现此问题。因此，请参阅有关该问题的更多详细信息，您需要在servicedebug标记中将includeexceptiondetailInfaults属性设置为 true 。

修改

对于那些不懂法语的人来说，错误转化为


服务器在处理请求时遇到错误。该   异常消息是＆＃39;可以为null的对象应该具有值。＆＃39;   。有关更多信息，请查看服务器日志。的痕迹   异常堆栈是：

System.ThrowHelper.ThrowInvalidOperationException（ExceptionResource   资源）到System.Nullable1.get_Value（）到   WCFEventsSchedule.EventService。＆LT;＆GT; c__DisplayClass2。＆LT; GetAllEvent＆gt;   b__1（事件x）

这意味着您在 GetAllEvent（）中尝试分配空值。如果你在那一点放置一个调试器，你可能会发现哪一行正在抛出异常

（提示：主要是那些不应该为NULL的值）

WCF Web服务找不到端点元素

2 个答案: