Marked Zones at Run Time

[John]

How do I go about adding marked zones at run time in the code behind? I've found the examples using xaml, but my zones will be determined at run time based on the data.

[Nikolay]

Hello John,

Please, consider the following approach, using a DispatcherTimer.

Adding the chart :

<telerik:RadChart Name="RadChart1" />

In code behind :

public MainPage()
        {
            InitializeComponent();

            Binding ann = new Binding();
            ann.Source = new ViewModel();
            ann.Path = new PropertyPath("Annotations");

            RadChart1.DefaultView.ChartArea.SetBinding(ChartArea.AnnotationsProperty, ann);
            RadChart1.DefaultSeriesDefinition = new LineSeriesDefinition();

            DispatcherTimer timer = new DispatcherTimer();
            timer.Tick += new EventHandler(timer_Tick);
            timer.Interval = TimeSpan.FromSeconds(3);
            timer.Start();
        }

        private Random rand = new Random(123456);

        void timer_Tick(object sender, EventArgs e)
        {
            RadChart1.ItemsSource = new int[] { rand.Next(100, 150), rand.Next(100, 150), rand.Next(100, 150) };
        }

and the ViewModel :

public class ViewModel
    {
        public AnnotationCollection Annotations
        {
            get
            {
                var col = new AnnotationCollection();
                col.Add(new CustomGridLine() { YIntercept = 120, Stroke = new SolidColorBrush(Colors.Red) });

                return col;
            }
        }
    }

Hopt his helps.

Kind regards,
Nikolay
the Telerik team