Telerik 折线图类别 Null答案

【问题标题】：Telerik Line Graph Categories NullTelerik 折线图类别 Null
【发布时间】：2015-03-19 12:10:31
【问题描述】：

我已经尝试了所有我知道的方法，但我似乎无法让它发挥作用......

我的目标是显示过去两周内提交的票证。我已经完成了 MVC 项目背面的所有逻辑，但我似乎无法正确显示它。我只是得到一个空白折线图，右边有图例。我提供了我的 Razor 代码和 JSON 返回数据。请帮忙。谢谢。

@(Html.Kendo().Chart<NewTicketsTwoWeekGraph>()
                    .Name("TwoWeekTickets")
                    .DataSource(dataSource => dataSource
                                .Read(read => read.Action("NewTicketsData_Read", "Home"))
                    )
                    .Series(series =>
                    {
                        series.Line(d => d.TicketCount).Name("Ticket Count");
                    })
                    .CategoryAxis(axis => axis
                        .Categories(t => t.TicketDate).Date().BaseUnit(ChartAxisBaseUnit.Days)
                        .Labels(labels => labels.Rotation(-90))
                        .Crosshair(c => c.Visible(true))
                    )
                    .ValueAxis(axis => axis.Numeric()
                        .Labels(labels => labels.Format("{0:N0}"))
                        .MajorUnit(10)
                    )
                )

JSON 返回：

    {"Data":[{"TicketCount":1,"TicketDate":"\/Date(1426651200000)\/","TicketDateString":"2015-03-18"},
{"TicketCount":2,"TicketDate":"\/Date(1426564800000)\/","TicketDateString":"2015-03-17"}],"Total":2,"AggregateResults":null,"Errors":null}

【问题讨论】：

标签： json asp.net-mvc telerik

【解决方案1】：

问题在于返回的 JSON 数据。它不喜欢被包裹在“数据”数组中。

所以我改变了我的 ActionResult 来解决这个问题...

public ActionResult _NewTicketCtOverTwoWeeks_Read([DataSourceRequest]DataSourceRequest request, string username)
    {
        using (var ctx = new GuardianContext())
        {
            var startDate = DateTime.Now.AddDays(-14);
            var graphData = from ticket in ctx.TICKETS
                            where ticket.CREATED > startDate
                            group ticket by DbFunctions.TruncateTime(ticket.CREATED)
                                into a
                                orderby a.Key
                                select new TicketCount() { TicketCt = a.Count(), TicketDate = (DateTime)a.Key, TicketDateString = a.Key.ToString().Substring(0, 10) };
           return Json(graphData.ToList());
        }
    }

所以现在我的 JSON 请求返回以下内容...

[{"TicketCt":2,"TicketDate":"\/Date(1426564800000)\/","TicketDateString":"2015-03-17"},{"TicketCt":11,"TicketDate":"\/Date(1426651200000)\/","TicketDateString":"2015-03-18"},{"TicketCt":20,"TicketDate":"\/Date(1426737600000)\/","TicketDateString":"2015-03-19"}]

【讨论】：