InnerException 消息是“反序列化对象 属于类型 *** 时出现错误读取 XML 数据时,超出最大字符串内容长度配额 (8192)(注意细节)

WEB站点调用我们WCF服务的时候,只要传入的参数过长,就报如下错误

格式化程序尝试对消息反序列化时引发异常: 尝试对参数 http://tempuri.org/ 进行反序列化时出错: formdataxml。InnerException 消息是“反序列化对象 属于类型 System.String 时出现错误。读取 XML 数据时,超出最大字符串内容长度配额 (8192)。通过更改在创建 XML 读取器时所使用的 XmlDictionaryReaderQuotas 对象的 MaxStringContentLength 属性,可增加此配额。 第 137 行,位置为 76。”。有关详细信息,请参阅 InnerException。

网上一搜索,答案基本得到解决,可我的问题就是不能解决(主要是细节打败了我),按照网上的文章进行服务器端修改配置如下:

<binding name="HttpBinding" maxReceivedMessageSize="2097152">
    <readerQuotas maxDepth="32" maxStringContentLength="2097152" maxArrayLength="2097152" maxBytesPerRead="2097152" maxNaMetableCharCount="2097152" />
    <security mode="None"></security>
 </binding>

其实这里主要的配置是两个:maxReceivedMessageSize、maxStringContentLength

网上提到还需要配置客户端,其实如果是报上面错误就不要管客户端了,因为如果是客户端调用WCF报错,就不是读取XML数据超时,而是明确的错误提示,如下:

已超过传入消息(1024)的最大消息大小配额。若要增加配额,请使用相应绑定元素上的 MaxReceivedMessageSize 属性

所以这篇文章提到的错误基本与客户端无关。

一般情况下,安装上面的修改就可以解决问题了,但是我的WCF还是报错,没办法,只能继续找,无意间发现服务器端WCF配置有点异常,不用登录验证的WCF接口有用到bindingConfiguration,但是需要验证的WCF接口就没有配置该属性,如下代码

   <bindings>
      <wsHttpBinding>
        <binding name="HttpBinding" maxReceivedMessageSize="2097152">
          <readerQuotas maxDepth="32" maxStringContentLength="2097152" maxArrayLength="2097152" maxBytesPerRead="2097152" maxNaMetableCharCount="2097152" />
          <security mode="None"></security>
        </binding><binding name="HttpBinding" maxReceivedMessageSize="2097152"> <readerQuotas maxDepth="32" maxStringContentLength="2097152" maxArrayLength="2097152" maxBytesPerRead="2097152" maxNaMetableCharCount="2097152" /> <security mode="None"></security> </binding>
      </wsHttpBinding>
    </bindings>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    <services>
      <service name="Achievo.MMIP.WMP.WebService.WMPProcService" behaviorConfiguration="wmpWcfBehavior">
        <endpoint address="" binding="wsHttpBinding" contract="Achievo.MMIP.WMP.WebServiceIService.WMPServiceProcIService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
      <service name="Achievo.MMIP.WMP.WebService.WMPGetFormDataService" behaviorConfiguration="wmpWcfFormDataBehavior">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="HttpBinding" contract="Achievo.MMIP.WMP.WebServiceIService.IWMPGetFormDataIService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>

注意红色部分的配置,大伙可以对比一下,就发现其中一个缺少bindingConfiguration配置;如果这个时候,把缺少的部分补上,和另外一个配置一样,WCF就会出错,这里我的初步判断是:name="Achievo.MMIP.WMP.WebService.WMPProcService"是必须要验证登录才能访问,所以不能绑定上面的匿名访问的配置,简单说就是规定是验证就不能在配置为匿名;所以把配置修改为如下:

  <bindings>
      <wsHttpBinding>
        <binding name="HttpBinding" maxReceivedMessageSize="2097152"> <readerQuotas maxDepth="32" maxStringContentLength="2097152" maxArrayLength="2097152" maxBytesPerRead="2097152" maxNaMetableCharCount="2097152" /> <security mode="None"></security> </binding> <binding name="HttpBinding1" maxReceivedMessageSize="2097152"> <readerQuotas maxDepth="32" maxStringContentLength="2097152"/> </binding>
      </wsHttpBinding>      
    </bindings>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    <services>
      <service name="Achievo.MMIP.WMP.WebService.WMPProcService" behaviorConfiguration="wmpWcfBehavior">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="HttpBinding1" contract="Achievo.MMIP.WMP.WebServiceIService.WMPServiceProcIService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
      <service name="Achievo.MMIP.WMP.WebService.WMPGetFormDataService" behaviorConfiguration="wmpWcfFormDataBehavior">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="HttpBinding" contract="Achievo.MMIP.WMP.WebServiceIService.IWMPGetFormDataIService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>

在验证,OK,通过。

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