使用JSON調用asmx Web服務器時發生內部服務器錯誤

Question

我創建了一個簡單的Web服務並將其發佈到我的主機。 當我通過網絡瀏覽器直接調用它時，它正在工作。

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

然後我試圖使用JSON響應格式的ASPX頁面調用它，但我得到一個內部服務器錯誤。

我的服務：

[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; 

    } 
} 

而且我從下方的方法aspx頁面調用它。

<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); 
    } 

我已經研究了許多與此錯誤相關的主題，但我找不到解決方案。

感謝，

編輯：

{"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這個問題。

看來問題在於，事實上有一個來自.NET的內置JSON序列化程序無法解決的循環引用。您有幾種選擇：

1. 使用另一個串行，像在給定的SO話題。
2. 返回不是DataSet或DataTable的自定義業務對象。
3. 可能的是，在實現推薦的WCF服務時，序列化程序的行爲會有所不同。

Answer 2

我已經將JSON的響應格式更改爲XML，現在看來已經解決了。 我不知道爲什麼json導致這個錯誤。

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

Answer 3

檢查您的Web.Config - 大部分問題都在那裏。

這裏是我的web.config，工程用AJAX調用我的web服務以及ASPX頁面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> 

---

編輯：試試下面的代碼：

---

您的WebMethod在*.asmx頁面

[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調用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); } 
}); 

是什麼改變了？

• 參數必須海誓山盟
• 周圍的參數名稱加引號的Ajax調用
• 如果數據不能正常工作，嘗試匹配data: JSON.stringify("{'Lang':'tr'}"),