WCF: maxStringContentLength始终设置为8192

Question

我需要将maxStringContentLength更改为大于8192的值，但没有成功。如果我的WCF服务接收的数据量大于8192字节，它将生成一个异常。我已经用尽了我的搜索，但似乎没有任何帮助。我应该指出的是，异常来自服务器。忘记客户端，因为我看到的异常是直接从服务器上的WCF生成的。以下是我的web.config设置：

<system.serviceModel>
  <behaviors>
    <serviceBehaviors>
      <behavior name="DevServiceBehavior" >
        <serviceMetadata httpGetEnabled="true" />
      </behavior>
    </serviceBehaviors>
  </behaviors>
  <services>
    <service name="DeveloperService"
             behaviorConfiguration="DevServiceBehavior" >
      <endpoint address="mtom"
                binding="basicHttpBinding"
                bindingConfiguration="Binding_DevService"
                contract="DeveloperService">
        <identity>
          <dns value="localhost"/>
        </identity>
      </endpoint>
      <endpoint contract="IMetadataExchange"
                binding="mexHttpBinding"
                address="mex" />
    </service>
  </services>
  <bindings>
    <basicHttpBinding>
      <binding name="Binding_DevService"
               messageEncoding="Mtom"
               openTimeout="00:02:00"
               sendTimeout="00:02:00"
               maxBufferPoolSize ="41943040"
               maxBufferSize="2147483647"
               maxReceivedMessageSize="2147483647">
        <readerQuotas maxDepth="500"
                      maxArrayLength="20000000"
                      maxStringContentLength="20000000" />
      </binding>
    </basicHttpBinding>
  </bindings>
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true"
                              multipleSiteBindingsEnabled="true"/>
</system.serviceModel>

Answer 1

默认情况下，WCF的最新版本实际上是默认设置，而json是默认设置。不清楚的是WCF使用的是哪种默认绑定。原来是webHttpBinding。您还将在web上看到大量示例，显示应用于服务方法的属性，例如WebGet。该方法根本不需要任何属性。要使maxStringContentLength生效，您需要正确设置绑定和行为。以下是web.config文件中的正确条目：

<system.serviceModel>
  <behaviors>
    <endpointBehaviors>
      <behavior name="jsonBehavior">
        <enableWebScript />
      </behavior>
    </endpointBehaviors>
    <serviceBehaviors>
      <behavior name="DevServiceBehavior" >
        <serviceMetadata httpGetEnabled="true" />
      </behavior>
    </serviceBehaviors>
  </behaviors>
  <services>
    <service name="DeveloperService" behaviorConfiguration="DevServiceBehavior" >
      <endpoint address="" binding="webHttpBinding" contract="DeveloperService" bindingConfiguration="webHttpBindingDev" behaviorConfiguration="jsonBehavior">
        <identity>
          <dns value="localhost"/>
        </identity>
      </endpoint>
      <endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
    </service>
  </services>
  <bindings>
    <webHttpBinding>
      <binding name="webHttpBindingDev">
        <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"  maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
      </binding>
    </webHttpBinding>
  </bindings> 
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>
</system.serviceModel>

Answer 2

同时更新你的客户端配置。在中设置Reader的配额，在binding部分设置Reader的属性。