Ajax调用返回500内部服务器错误

Question

我想使谷歌地图出现在我的网页上，而不使用其他页面加载。当我尝试调用我拥有的Web方法时，我总是收到错误消息。下面是我用它来调用Web方法的代码：

HTML

<form id="cSharpServerSideForm" runat="server"> 
     <asp:ScriptManager ID="_scriptManager" runat="server"> 
      <Services> 
      <asp:ServiceReference Path="WebServices/Ajax.asmx" /> 
      </Services> 
     </asp:ScriptManager> 
    </form> 

的Javascript：

//To get webservice (located in document.ready) 
vars.service = MyMap.WebServices.Ajax; 

getInputForCenterMap = function() { 
//The Jarray used 
var jArrayCoords; 

var ResponseArray;

//Input values 
tCity = ""; 
tState = ""; 
tZip = ""; 

//Gets input values 
tCity = $('#cityInput').val(); 
tState = $('#stateInput').val(); 
tZip = $('#zipInput').val(); 

//Checks to see inputs entered 
if (tZip == "" && tState == "" && tCity == "") { //Nothing entered 
    //Error message 
    $('#cszErrorMessage').html("Please enter a city/state or zip code"); 
} else { 
    //In case of errors 
    try { 
     //Check what has been entered 
     if (tZip == "") { //City and state entered 
      //Init array call 
      jArrayCoords = new Array(2); 
      //Adds city and state to array 
      jArrayCoords[0] = tCity; 
      jArrayCoords[1] = tState; 

     } else { //Zip entered 
      //Init array call 
      jArrayCoords = new Array(1); 
      //Adds city and state to array 
      jArrayCoords[0] = tZip; 
     } 

     //Calls web service 
     vars.service.getMapCenterCoords(jArrayCoords, function (response) { 
      //Turns response into a jarray 
      responseArray = new Array(response); 
      //Rest of code 
     }); 

    } catch (error) { 
     //Error message 
    } 
} 

C＃

public double[] getMapCenterCoords(JArray userLocationInformation) 
    { 
     //Method information 
    } 

只要调用c＃方法，我就会出错。以下是错误消息：

500 Internal Server Error 

"System.ArgumentException" 

"Argument is not a JToken." 

" at Newtonsoft.Json.Linq.JContainer.EnsureValue(Object value) at Newtonsoft.Json.Linq.JContainer.System.Collections.IList.Add(Object value) at System.Web.Script.Serialization.ObjectConverter.AddItemToList(IList oldList, IList newList, Type elementType, JavaScriptSerializer serializer, Boolean throwOnError) at System.Web.Script.Serialization.ObjectConverter.ConvertListToObject(IList list, Type type, JavaScriptSerializer serializer, Boolean throwOnError, IList& convertedList) at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject) at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject) at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary`2 rawParams) at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters) at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams) at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)" 

有什么建议？

Answer 1

查看Fiddler中的请求，并查看实际发生的情况。它应该可以帮助你隔离问题。

另外，你有没有尝试过在你的web方法中设置断点？它甚至能达到这一点吗？