“无效的JSON原语"在Ajax处理中 [英] "Invalid JSON primitive" in Ajax processing

问题描述

我在jQuery的ajax调用中遇到错误.

I am getting an error in an ajax call from jQuery.

这是我的jQuery函数:

Here is my jQuery function:

function DeleteItem(RecordId, UId, XmlName, ItemType, UserProfileId) {
    var obj = {
        RecordId: RecordId,
        UserId: UId,
        UserProfileId: UserProfileId,
        ItemType: ItemType,
        FileName: XmlName
    };
    var json = Sys.Serialization.JavaScriptSerializer.serialize(obj);

    $.ajax({
        type: "POST",
        url: "EditUserProfile.aspx/DeleteRecord",
        data: json,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        async: true,
        cache: false,
        success: function(msg) {
            if (msg.d != null) {
                RefreshData(ItemType, msg.d);
            }
        },
        error: function(XMLHttpRequest, textStatus, errorThrown) {
            alert("error occured during deleting");
        }
    });
}

这是我的WebMethod:

[WebMethod]
public static string DeleteRecord(Int64 RecordId, Int64 UserId, Int64 UserProfileId, string ItemType, string FileName) {
    try {
        string FilePath = HttpContext.Current.Server.MapPath(FileName);

        XDocument xmldoc = XDocument.Load(FilePath);
        XElement Xelm = xmldoc.Element("UserProfile");
        XElement parentElement = Xelm.XPathSelectElement(ItemType + "/Fields");

        (from BO in parentElement.Descendants("Record")
         where BO.Element("Id").Attribute("value").Value == RecordId.ToString()
         select BO).Remove();
        XDocument xdoc = XDocument.Parse(Xelm.ToString(), LoadOptions.PreserveWhitespace);
        xdoc.Save(FilePath);

        UserInfoHandler obj = new UserInfoHandler();
        return obj.GetHTML(UserId, UserProfileId, FileName, ItemType, RecordId, Xelm).ToString();
    } catch (Exception ex) {
        HandleException.LogError(ex, "EditUserProfile.aspx", "DeleteRecord");
    }
    return "success";
}

有人可以告诉我我的代码有什么问题吗?

Can anybody please tell me what's wrong in my code?

我收到此错误:

{
    "Message":"Invalid JSON primitive: RecordId.",
    "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"
}

推荐答案

只需猜测变量json之后包含什么

Just a guess what does the variable json contain after

var json = Sys.Serialization.JavaScriptSerializer.serialize(obj);?

如果它是像{'foo':'foovalue', 'bar':'barvalue'}这样的有效json对象，则jQuery可能不会将其作为json数据发送，而是将其序列化为foor=foovalue&bar=barvalue，因此您会收到错误"Invalid JSON primitive: foo"

If it is a valid json object like {'foo':'foovalue', 'bar':'barvalue'} then jQuery might not send it as json data but instead serialize it to foor=foovalue&bar=barvalue thus you get the error "Invalid JSON primitive: foo"

尝试改为将数据设置为字符串

Try instead setting the data as string

$.ajax({
    ...
    data: "{'foo':'foovalue', 'bar':'barvalue'}", //note the additional quotation marks
    ...
})

通过这种方式，jQuery应该不理会数据并将字符串原样发送到服务器，这应允许ASP.NET解析json服务器端.

This way jQuery should leave the data alone and send the string as is to the server which should allow ASP.NET to parse the json server side.

这篇关于“无效的JSON原语"在Ajax处理中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！