使用WCF IQueryable的问题 [英] IQueryable problems using WCF

问题描述

我有它返回一个IQueryable，只是为了测试一个很简单的WCF服务的方法。也许我试图了解IQueryable的是专为当有东西是错误的。我清楚地打算使用此与NHibernate的IQueryable的供应商后。但首先，我遇到了某种序列化问题（至少我认为这可能是问题）使用WCF方法返回一个IQueryable时。它甚至没有工作的一个简单的字符串。

I have a quite simple WCF service method which returns an IQueryable, just for testing. Perhaps I got something wrong when trying to understand what IQueryable is designed for. I clearly plan to use this with the IQueryable provider of NHibernate later. But first I ran into some sort of serialization problems (at least I think it might be the problem) whenever using a WCF method returning an IQueryable. It doesn't even work for a simple string.

下面是我的code：

public IQueryable<string> GetEquipmentConfigurations()
{
  var returnValue = new List<string>();
  returnValue.Add("test");
  return returnValue.AsQueryable();
}

这可能没有多大意义，它只是用于测试我是否真的得到这些IQueryables在使用WCF电线。每当我打电话使用客户端一样了SoapUI我得到一个插座异常和连接复位，只是一样的，如果我试图返回的东西没有被标记为DataContract此方法。但是，我在这里做的唯一事情是试图返回一些糟糕的字符串列表。有什么不好呢？

It might not have much sense, it's just for testing whether I really get those IQueryables over the wire using WCF. Whenever I call this method using a client like SoapUI I get a socket exception and a connection reset, just the same as if I was trying to return something that is not marked as DataContract. But the only thing I do here is trying to return some lousy string list. What's wrong with that?

我用basicHttpBinding的，这里是我的设置：

I use basicHTTPBinding, here are my settings:

<system.serviceModel>
   <services>
      <service name="EquipmentConfigurationService" behaviorConfiguration="DefaultBehavior">
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8000/Krones.KBase/Services/EquipmentConfigurationService"/>
          </baseAddresses>
        </host>
        <endpoint address=""
                  binding="basicHttpBinding"
                  contract="Krones.MES.KBase.Public.Service.EquipmentDefinition.IEquipmentConfigurationService" />
        <endpoint address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" />
      </service>
   </services>
   <behaviors>
      <serviceBehaviors>
         <behavior name="DefaultBehavior">
            <serviceMetadata httpGetEnabled="True"/>
            <serviceDebug includeExceptionDetailInFaults="True"/>
         </behavior>
      </serviceBehaviors>
   </behaviors>
</system.serviceModel>

在OperationContract的属性设置为接口：

The OperationContract attribute is set for the interface:

[OperationContract]
IQueryable<string> GetEquipmentConfigurations();

这一切运作良好时，只返回一个简单的字符串。无论如何，我想获取利润后使用LINQ的IQueryable的功能。

It all works well when just returning a simple string. Anyway I want to take profit from the IQueryable features using LINQ later.

任何人任何想法是怎么回事错在这里？

Anybody any idea what's going wrong here?

感谢和欢呼声中，

斯特凡

推荐答案

（过时） AFAIK这是不可能的开箱即用序列化的IQueryable＆LT;>或Ex pression树（想想看 - 那岂不是前pression树/λ需要被序列化和功能重建的）

(Obsolete) AFAIK it isn't possible out of the box to serialize IQueryable<> or Expression Trees (think about it - it would mean that the expression tree / lambda would need to be serialized and the function rebuilt)

不过，这里有一个会，似乎还有一个办法 - 你可能想要看的项目，如本 HTTP：//$c$c.msdn.microsoft.com/exprserialization

However, where there is a will, it seems there is a way - you might want to look at projects such as this http://code.msdn.microsoft.com/exprserialization

修改：请注意，时代已经变了 - 请参见WCF RIA服务按马克Gravell的帖子

Edit : Note that times have changed - See WCF RIA Services as per Marc Gravell's post.

祝你好运！

心连心

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