JSON 序列化长度限制问题

{"Message":"使用 JSON JavaScriptSerializer 进行序列化或反序列化时出错。字符串的长度超过了为 maxJsonLength 属性设置的值。

","StackTrace":" 在 System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output,

 SerializationFormat serializationFormat)\r\n 在 System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj,

 SerializationFormat serializationFormat)\r\n 在 System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context,

 WebServiceMethodData methodData, IDictionary`2 rawParams)\r\n 在

 System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)",

"ExceptionType":"System.InvalidOperationException"} 

解决方案： 

<system.web.extensions>
  <scripting>
   <webServices >
    <jsonSerialization maxJsonLength="1024000"></jsonSerialization>
   </webServices>
  </scripting>
 </system.web.extensions>