jquery - 通过 Jquery 获取 jsonString 为空

Question

我正在使用 asp mvc，并且我正在像这样在程序的一部分中获取数据

 public List<IncidentPerAreaCount> getIncident()
    {
        int RondeboschCounter = 0;
        int ClaremontCounter = 0;
        int AthloneCounter = 0;
        List<IncidentPerAreaCount> IncidentAreaCount = new List<IncidentPerAreaCount>();
        IncidentPerAreaCount Rondebosch = new IncidentPerAreaCount();
        IncidentPerAreaCount Claremont = new IncidentPerAreaCount();
        IncidentPerAreaCount Athlone = new IncidentPerAreaCount();

        List<Report> Reports = GetReports();
        for (int i = 0; i < Reports.Count(); i++)
        {
            if (Reports.AsEnumerable().ElementAt(i).Area == "Rondebosch")
            {
                RondeboschCounter++;
            }
            else if (Reports.AsEnumerable().ElementAt(i).Area == "Claremont")
            {
                ClaremontCounter++;
            }
            else if (Reports.AsEnumerable().ElementAt(i).Area == "Athlone")
            {
                AthloneCounter++;
            }

        }
        Rondebosch.AreaName = "Rondebosch";
        Rondebosch.NumberOfIncidents = RondeboschCounter;
        Claremont.AreaName = "Claremont";
        Claremont.NumberOfIncidents = ClaremontCounter;
        Athlone.AreaName = "Athlone";
        Athlone.NumberOfIncidents = AthloneCounter;

        IncidentAreaCount.Add(Rondebosch);
        IncidentAreaCount.Add(Claremont);
        IncidentAreaCount.Add(Athlone);

        return IncidentAreaCount;
    }

然后我尝试通过 Jquery 获取这个字符串

 var Reports = [];
    $.ajax({
    url: "Home/getIncident",
    async: false,
    dataType: 'json',
    success: function (json) { Reports = json.whatever; }
    });
    alert(Reports);

但是，警报函数始终显示为空(即空文本框)，而不是包含数据的 json 格式字符串。

请帮忙...

Answer 1

您将警报放在了错误的位置。

$.ajax({
    url: "Home/getIncident",
    async: false,
    dataType: 'json',
    success: function (json) {
        Reports = json.whatever; 
        alert(Reports); // should be here.
    }
});

阅读this和 this在进入代码之前。