使用JSON调用asmx Web服务器时发生内部服务器错误

Question

我创建了一个简单的Web服务并将其发布到我的主机。 当我通过网络浏览器直接调用它时，它正在工作。

http://test.xxxx.com/service1.asmx/HelloWorld

然后我试图使用JSON响应格式的ASPX页面调用它，但我得到一个内部服务器错误。

我的服务：

[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
[System.ComponentModel.ToolboxItem(false)] 

[System.Web.Script.Services.ScriptService] 
public class Service1 : System.Web.Services.WebService 
{ 
    [WebMethod] 
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)] 
    public DataSet HelloWorld() 
    { 
     DataSet ds = new DataSet(); 
     //da.Fill(ds); 
     ds.Tables.Add("Table0"); 
     ds.Tables[0].Columns.Add("Test"); 
     for (int i = 0; i < 20; i++) 
     { 
      ds.Tables[0].Rows.Add("Test " + i); 
     } 

     return ds; 

    } 
} 

而且我从下方的方法aspx页面调用它。

<script type="text/javascript"> 
    function CallService() { 
     $("#lblResult").addClass("loading"); 
     $.ajax({ 
      type: "POST", 
      url: "http://test.xxx.com/service1.asmx/HelloWorld", 
      data: "{Lang:'tr'}", 
      contentType: "application/json; charset=utf-8", 
      dataType: "json", 
      success: Success, 
      error: Error 
     }); 
    } 

    function Success(data, status) { 
     $("#lblResult").removeClass("loading"); 
     $("#lblResult").html(data.d); 
     alert(data.d); 
    } 

    function Error(request, status, error) { 
     $("#lblResult").removeClass("loading"); 
     $("#lblResult").html(request.statusText); 
     alert(error); 
    } 

我已经研究了许多与此错误相关的主题，但我找不到解决方案。

感谢，

编辑：

{"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 System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)\r\n at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat)\r\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.InvalidOperationException"} 

Answer 1

有a topic on SO这个问题。

看来问题在于，事实上有一个来自.NET的内置JSON序列化程序无法解决的循环引用。您有几种选择：

1. 使用另一个串行，像在给定的SO话题。
2. 返回不是DataSet或DataTable的自定义业务对象。
3. 可能的是，在实现推荐的WCF服务时，序列化程序的行为会有所不同。

Answer 2

我已经将JSON的响应格式更改为XML，现在看来已经解决了。 我不知道为什么json导致这个错误。

//[ScriptMethod(ResponseFormat = ResponseFormat.Json)] 
    [System.Web.Script.Services.ScriptMethod(ResponseFormat = System.Web.Script.Services.ResponseFormat.Xml)] 

Answer 3

检查您的Web.Config - 大部分问题都在那里。

这里是我的web.config，工程用AJAX调用我的web服务以及ASPX页面Web方法

<system.serviceModel> 
    <behaviors> 
     <endpointBehaviors> 
      <behavior name="MyBehaviors"> 
       <enableWebScript /> 
      </behavior> 
     </endpointBehaviors> 
     <serviceBehaviors> 
      <behavior name="MyBehaviors"> 
       <serviceMetadata httpGetEnabled="true" /> 
       <serviceDebug httpHelpPageEnabled="true" includeExceptionDetailInFaults="true" /> 
       <dataContractSerializer maxItemsInObjectGraph="2147483647"/> 
      </behavior> 
     </serviceBehaviors> 
    </behaviors> 
    <!-- I dont think the services part is necessary if you wont use Web Service, but leave it in anycase --> 
    <services> 
     <service name="YourNamespace.ServiceClass" behaviorConfiguration="MyBehaviors"> 
      <endpoint address="" behaviorConfiguration="MyBehaviors" binding="webHttpBinding" contract="YourNamespace.IServiceClass" /> 
     </service> 
    </services> 
    <bindings> 
     <basicHttpBinding> 
      <binding name="MyBasicHttpBinding" messageEncoding="Text" textEncoding="utf-8" allowCookies="false" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"> 
       <readerQuotas maxStringContentLength="2147483647" /> 
      </binding> 
     </basicHttpBinding> 
    </bindings> 
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" minFreeMemoryPercentageToActivateService="1" aspNetCompatibilityEnabled="true" /> 
</system.serviceModel> 

---

编辑：试试下面的代码：

---

您的WebMethod在*.asmx页面

[WebMethod] 
public DataSet HelloWorld(string Lang) 
{ 
    DataSet ds = new DataSet(); 
    //da.Fill(ds); 
    ds.Tables.Add("Table0"); 
    ds.Tables[0].Columns.Add("Test"); 
    for (int i = 0; i < 20; i++) 
    { 
     ds.Tables[0].Rows.Add("Test " + i); 
    } 
    return ds; 
} 

Ajax调用JavaScript中

$.ajax({ 
    type: "POST", 
    url: "http://test.xxx.com/service1.asmx/HelloWorld", 
    data: "{'Lang':'tr'}", 
    contentType: "application/json; charset=utf-8", 
    dataType: "json", 
    success: function(ds){ alert(ds.length); }, 
    error: function(s,a,x){ alert(a); } 
}); 

是什么改变了？

• 参数必须海誓山盟
• 周围的参数名称加引号的Ajax调用
• 如果数据不能正常工作，尝试匹配data: JSON.stringify("{'Lang':'tr'}"),