在 WCF 服务中传递大量数据

Question

我已经看到这个问题出现了几次，但没有真正明确的答案（因为很可能没有）...我有一个 WCF 服务，需要从 SQL 返回大约 14,000 行数据，这些数据在 List<> 中排序基于数组。

我的服务配置如下：

<system.serviceModel>
<bindings>
  <basicHttpBinding>
    <binding name="BasicHttpBinding_IParts" closeTimeout="00:01:00"
        openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
        allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
        maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
        messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
        useDefaultWebProxy="true">
      <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647"
          maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
      <security mode="None">
        <transport clientCredentialType="None" proxyCredentialType="None"
            realm="" />
        <message clientCredentialType="UserName" algorithmSuite="Default" />
      </security>
    </binding>
  </basicHttpBinding>
</bindings>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
<behaviors>
  <serviceBehaviors>
    <behavior>
      <serviceMetadata httpGetEnabled="true"/>
      <serviceDebug includeExceptionDetailInFaults="true"/>
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
    </behavior>
  </serviceBehaviors>
</behaviors>

我的客户端配置如下：

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="BasicHttpBinding_IParts" closeTimeout="00:01:00"
                openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
                messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647"
                    maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
                <security mode="None">
                    <transport clientCredentialType="None" proxyCredentialType="None"
                        realm="" />
                    <message clientCredentialType="UserName" algorithmSuite="Default" />
                </security>
            </binding>
        </basicHttpBinding>
    </bindings>
    <client>
        <endpoint address="http://localhost/RasFuseService/Parts.svc"
            binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IParts"
            contract="MyParts.IParts" name="BasicHttpBinding_IParts" />
    </client>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MyServiceBehavior">
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
</system.serviceModel>

有些事情不对劲，因为我收到了错误：

格式化程序在尝试反序列化消息时引发异常：尝试反序列化参数http://tempuri.org/:GetSurplusECMResult时出错 。InnerException 消息是“对象图中可以序列化或反序列化的最大项目数为“65536”。更改对象图或增加 MaxItemsInObjectGraph 配额。'。请参阅 InnerException 了解更多详细信息。

即使我显式分配 MaxItemsInObjectGraph 与最大整数...

我读过有关流式处理和分页的内容，但是单次返回的数据真的太多了吗？

Answer 1

想通了（拍打额头）我最终在客户端写了一个错误的条目。客户端的正确语法应该是：

  <behaviors>
    <endpointBehaviors>
      <behavior >
        <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
      </behavior>
    </endpointBehaviors>
  </behaviors>

不是

  <behaviors>
    <serviceBehaviors>
      <behavior>
        <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
      </behavior>
    </serviceBehaviors>
  </behaviors>

现在它返回并反序列化我的大数组而不会抱怨......