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How to bind Json Data to kendo Line Chart

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Earl
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Earl asked on 03 Feb 2021, 10:14 AM
Here is my code 
try
         {
             if (list != null && list.Count > 0)
             {
                 var serializer = new JavaScriptSerializer();
                 var hourList = list.GroupBy(x => x.LogDate.Hour).Select(x =>x.First()).Select(x => x.LogDate.Hour);
 
                 foreach (var hour in hourList)
                 {
                     result.AddRange(list.Where(y => y.LogDate.Hour == hour).Select(y =>
                     {
                         var jsonObj = serializer.Deserialize<Dictionary<string, object>>(y.DashboardChartData);
                         var jsonDoc = new Dictionary<string, object>();
                         jsonDoc.Add(y.DashboardChartName, jsonObj.ContainsKey("Usage") ? jsonObj["Usage"] : string.Empty);
                         jsonDoc.Add("LogDateTime", y.LogDate);
                         jsonDoc.Add("Type", y.DashboardChartType);
 
                         var json = JsonConvert.SerializeObject(jsonDoc);
 
                         return json;
                     }));
                 }
             }
         }

 

Html.Kendo().Chart()
                              .Name("datastoreUsageChart" + i)
                              .Title("DataStoreChart")
                              .Legend(legend => legend
                              .Visible(false)
                              )
                              .ChartArea(chartArea => chartArea
                              .Background("transparent")
                              .Height(300)
                              )
                              .HtmlAttributes(new { style = "height:100%; margin-bottom:0px; width:30%; display:inline-block; vertical-align: top; padding-right: 2%;", @class = "chart-small-screen" })
                              .DataSource(ds => ds.Read(read => read.Action("GetDatastoreChartTotalData", "DashBoard", new { vCenterId = vCenter.vCenterID })))
                              .Series(series =>
                              {
                                  foreach (var datastore in tempList)
                                  {
                                      series.Line(datastore).ColorHandler("getColor").CategoryField("LogDateTime").Aggregate(ChartSeriesAggregate.Max);
                                  }
                              }
                              )
                              .CategoryAxis(axis => axis
                              .Date()
                              .BaseUnit(ChartAxisBaseUnit.Hours)
                              .Min(new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 0, 0, 0))
                              .Max(new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 23, 59, 59))
                              .MajorGridLines(lines => lines.Visible(false))
                              )
                              .ValueAxis(axis => axis
                              .Numeric()
                              .Labels(labels => labels.Format("{0}"))
                              )
                              .Events(e=>e.DataBound("onDataBoundChart"))
                              .Tooltip(tooltip => tooltip
                              .Visible(true)
                              .Format("{0}-Session")
                              ).ToHtmlString()

Json Data comes like this 

 

but it doesn't work 


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Tsvetomir
Telerik team
answered on 05 Feb 2021, 06:37 AM

Hi Earl,

I have investigated the provided code snippets and I have noticed that the JSON that is being returned is actually a serialized Dictionary object. However, the Chart expects to receive and IEnumerable collection with objects that contain the different properties and their respective values. 

Is it possible for you to create a list with objects, pass the values as part of objects (might be anonymous), and serialize the list collection?

Let me know if the data is still not bound.

 

Kind regards,
Tsvetomir
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Tsvetomir
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