从AJAX服务- WCF返回大JSON文件

Question

我有一个返回JSON的基于ajax的WebGet方法。它不能处理几千行的JSON结果(如果我只取100行左右，它就可以工作)。我注意到浏览器只是停滞不前，什么也没有发生，没有任何信息显示Firebug控制台:

    [WebGet]
    public HttpTransactionTransformArgs Test()
    {
        HttpTransactionFilterArgs args = new HttpTransactionFilterArgs();
        args.Context = "MyDb";
        args.Entity = "MyDbRow";
        args.Key = "1";
        args.Option = null;
        HttpTransactionTransformArgs targs = new HttpDataPush().TransformRequest(args);
        return targs; 
    }
[DataContract]
[KnownType(typeof(HttpTransactionTransformArgs))]
[KnownType(typeof(HttpColumnDefinition))]
[KnownType(typeof(HttpDataRow))]
public class HttpTransactionTransformArgs
{
    [DataMember]    
    public string EntityName { get; set; }
    [DataMember]
    public List<HttpColumnDefinition> Schema { get; set; }
    [DataMember]
    public List<HttpDataRow> Data { get; set; }
    [DataMember]
    public bool TransactionSuccessful { get; set; }
}

下面是我的WCF服务器端配置:

  <service name="Test.AJAXService" behaviorConfiguration="metadataBehavior">
    <endpoint address="" behaviorConfiguration="Test.AJAXServiceAspNetAjaxBehavior" 
              bindingConfiguration="webHttpConfig"
              binding="webHttpBinding" contract="Test.IAJAXServiceTest" />
  </service>

这是我正在应用的webHttpBinding配置:

      <webHttpBinding>
    <binding name="webHttpConfig" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" maxBufferSize="2147483647"
              closeTimeout="00:30:00" openTimeout="00:30:00" receiveTimeout="00:30:00" sendTimeout="00:30:00" >
      <readerQuotas maxStringContentLength="2147483647" maxArrayLength="2147483647"
                    maxDepth="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
    </binding>
  </webHttpBinding>

下面是结束行为:

    <behavior name="Test.AJAXServiceAspNetAjaxBehavior">
      <enableWebScript />
      <webHttp defaultOutgoingResponseFormat="Json"  />
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
    </behavior>

在我看来，一切都是最大的，它应该工作，我可能错过了什么?

Answer 1

我通过改变元数据行为配置上的dataContractSerializer属性来解决这个问题，因为AJAXServiceAspNetAjaxBehavior是不够的。它从服务级别获取了我的maxItemsInObjectGraph属性，而不是endint级别:

<service name="Test.AJAXService" behaviorConfiguration="metadataBehavior">   
     <endpoint address="" behaviorConfiguration="Test.AJAXServiceAspNetAjaxBehavior"             
       bindingConfiguration="webHttpConfig"               
       binding="webHttpBinding" 
       contract="Test.IAJAXServiceTest" />   
</service> 

在metadataBehavior:

    <behavior name="metadataBehavior">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
      <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
    </behavior>