发送JSON对象到.net webservice时出现内部服务器错误

Internal Server Error when sending JSON object to .NET webservice

本文关键字：内部 服务器 错误 webservice JSON 对象 net 发送      更新时间：2023-09-26

我在向。net web服务提交一个复杂的JSON对象时遇到了问题。

Ajax JavaScript代码: 
$.ajax({
    type: "POST",
    url: WEBSERVICE_ADMINISTRATIO_URL + "RecieveData",
    data: JSON.stringify({data: _data}), // _data is the Javascipt object {}
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (data) {
        alert(data);
    },
    failure: function (errMsg) {
        alert(errMsg);
    },
    error: function (jqXHR, textStatus, errorThrow) {
        alert(textStatus);
    }
});

.NET webservice

 [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public string RecieveData(string data)
    {
        return "";
    }

我得到一个内部服务器错误500当试图从客户端提交数据到webservice。

我有其他的webservice函数，只是返回数据，他们工作得很好。我在web.config中赋予了GET和POST权限。

下面是详细的错误:

"{"Message":"No parameterless constructor defined for type of 
 'u0027System.String'u0027.","StackTrace":"   at 
system.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject(IDictionary`2 dictionary, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object'u0026 convertedObject)'r'n   at 
System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object'u0026 convertedObject)'r'n   at 
System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object'u0026 convertedObject)'r'n   at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToType(Object o, Type type, JavaScriptSerializer serializer)'r'n   at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary`2 rawParams)'r'n   at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)'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.MissingMethodException"}"

谢谢。

感谢大家的支持。我可以通过将参数数据类型从string更改为Object来解决这个问题。

 public string RecieveData(Object data)
{
    return "";
}
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