Declarative RadChart Legend issues.

[Nick]

Hello,
This is my first time using telerik RadControls and I've tried to create a RadChart using the declarative RadChart example however the custom item and legend title are missing. If I turn off auto generation I lose the legend entirely.

Initially I thought I must have done something wrong but it is the same on your example here:
http://demos.telerik.com/silverlight/#Chart/DeclarativeChart

If you look at the code it should have a custom item called "Custom Legend Item" which it claims should appear first in the list.

Is this a known issue or have I misunderstood something?

Regards,
Nick

[Velin]

Hello Nick,

Indeed, there is a known issue with declaratively created legend items in RadChart for Silverlight and it is clearly visible in our online example. We've planned to fix it in the shortest terms possible and in the meanwhile you can add culstom legend items in code behind. Here is the code:

        void Page_Loaded(object sender, RoutedEventArgs e)
        {
            RadChart1.DefaultView.ChartLegend.Items.Insert(0, new Telerik.Windows.Controls.Charting.ChartLegendItem() { Label = "Custom Item" });
        }

Hope this helps.

Sincerely,
Velin
the Telerik team

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[Monalisa]

Hi,

How do I show the X-axis label fetching data from Database using WCF in case of Stacked Spline Chart.
Anybody can reply me how to do this. This is very urgent, please reply as soon as possible

Thanks,
Monalisa

[Velin]

Hi Monalisa,

Please, find attached a small project demonstrating the desired behavior. Here is the code behind:

using System;
using System.Collections.Generic;
using System.Windows.Controls;
using Telerik.Windows.Controls.Charting;

namespace SilverlightApplication1
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();

            RadChart1.DefaultSeriesDefinition = new SplineSeriesDefinition();
            RadChart1.DefaultSeriesDefinition.ShowItemToolTips = true;
            RadChart1.DefaultSeriesDefinition.ItemToolTipFormat = "Date: #XCAT\r\nResult: #Y";

            RadChart1.DefaultView.ChartArea.AxisX.LabelRotationAngle = 90;
            //RadChart1.DefaultView.ChartArea.AxisX.DefaultLabelFormat = "mm/dd/yyyy";
            SeriesMapping s = new SeriesMapping();

            ItemMapping x = new ItemMapping("DT", DataPointMember.XCategory);
            ItemMapping y = new ItemMapping("D", DataPointMember.YValue);

            s.ItemMappings.Add(x);
            s.ItemMappings.Add(y);

            RadChart1.SeriesMappings.Add(s);

            RadChart1.ItemsSource = A.Fill(10);
        }
    }

    public class A
    {
        public double D { get; set; }
        public DateTime DT { get; set; }

        public static IEnumerable<A> Fill(int n)
        {
            DateTime now = DateTime.Now;
            for (int i = 0; i < n; i++)
            {
                A a = new A() { D = i, DT = now.AddDays(i) };

                yield return a;
            }
        }
    }
}

Regards,

Author nickname

the Telerik team

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Sincerely yours,
Velin
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.