关于c＃：使用JSON从jQuery调用Web服务

Using JSON to Call Web Service from jQuery

本问题已经有最佳答案，请猛点这里访问。

多痛苦啊！我试着从javascript中调用一个Web服务，但是我似乎找不到让它工作所需的魔力。

我的代码如下所示：

JavaScript：

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$.ajax({
url:"/Services/CompanyContactServices.asmx/AddContact",
type: 'POST',
contentType:"application/json",
dataType:"json",
data: {
companyId: 3725, firstName: firstName, lastName: lastName, email: email
},
success: function (data) {
alert('Success!');
},
error: function (jqXHR, textStatus, errorThrown) {
alert(errorThrown);
}
});

Web服务(asmx.cs)：

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[WebService(Namespace = CompanyListServices.XmlnsNamespace)]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class CompanyContactServices : System.Web.Services.WebService
{
public const string XmlnsNamespace ="mynamespace";

[WebMethod(EnableSession = true)]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string AddContact(int companyId, string firstName, string lastName, string email)
{
return new JavaScriptSerializer().Serialize(0);
}
}

在我的AddContact方法的开始处从未到达断点。

我的ajax()调用的error处理程序在jqXHR中包含以下错误消息：

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

Chrome报告以下网络数据：

Request URL:.../Services/CompanyContactServices.asmx/AddContact

Request Method:POST

Status Code:500 Internal Server Error

有人能看到我丢失的东西吗？