序列化类型为System.Globalization.CultureInfo的对象时检测到循环引用 [英] A circular reference was detected while serializing an object of type System.Globalization.CultureInfo

问题描述

我正在使用jquery调用一个Web服务，该服务返回其中包含几个表的数据集.

I'm using jquery to call a webservice which returns a dataset with a couple of tables in it.

在我需要设置我的网络方法以接受参数之前，此方法工作正常.我用

This was working ok until i needed to set up my webmethod to accept a parameter. I reflected this on the client side with

data: "{paramname:'" + paramval+ "'}",

当web方法返回时，我现在收到以下错误.无论数据集中返回什么，都会发生这种情况

I now get the following error when the webmethod returns. This happens regardless of whats being returned in the dataset

错误:{"Message":序列化时检测到循环引用 类型的对象 \ u0027System.Globalization.CultureInfo \ u0027.，" StackTrace:"位于 System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o，StringBuilder sb，Int32深度，Hashtable objectsInUse， SerializationFormat serializationFormat)\ r \ n在...等

Error:{"Message":"A circular reference was detected while serializing an object of type \u0027System.Globalization.CultureInfo\u0027.","StackTrace":" at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at ...etc

当web方法没有参数时，客户端js看起来与以下相同，除了data:行被删除.

When the webmethod has no parameters the client side js looks the same as below except the data: line is removed.

function ClientWebService(paramval){
$.ajax({
    type: "POST",
    url: "WebService1.asmx/webmethodName", 
    data: "{paramname:'" + paramval+ "'}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(msg) {
        ParseResult(msg.d);
    },
    error: function(err) {
        if (err.status == 200) {
              ParseResult(err);
        }
        else { alert('Error:' + err.responseText + '  Status: ' + err.status); }
    }
}); 

}

根据将请求更改为

data: {paramname: paramval},

产生以下错误.

错误:{"Message":无效的JSON原语:paramval."，"StackTrace":"
在 System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject()\ r \ n 在 System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 深度)\ r \ n System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String 输入，Int32 depthLimit，JavaScriptSerializer序列化器)\ r \ n位于 System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer 序列化程序，字符串输入，类型类型，Int32 depthLimit)\ r \ n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize [T](字符串 输入)\ r \ n System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext 上下文，JavaScriptSerializer序列化器)\ r \ n位于 System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData，HttpContext上下文)\ r \ n位于 System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext 上下文，WebServiceMethodData methodData)，" ExceptionType:" System.ArgumentException}状态:500

Error:{"Message":"Invalid JSON primitive: paramval.","StackTrace":"
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject()\r\n at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[T](String input)\r\n at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext context, JavaScriptSerializer serializer)\r\n at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.ArgumentException"} Status: 500

推荐答案

我将web方法更改为返回

I changed my webmethod to return

ds.GetXml();

，并且有效.考虑到数据集是可序列化的，我不确定为什么必须这样做，但这使我克服了这一障碍.

and this worked. Considering datasets are serializeable I'm not sure why I have to do this, but it gets me over this hurdle.

这篇关于序列化类型为System.Globalization.CultureInfo的对象时检测到循环引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！