ChartItemClick

[dennis]

is there any way to access the radchart who invoked the method???
i only can access to the bar. whne i debug i can see that the bar has a private variable "parent" that references to the RadChart.
but the public property "Parent" is null.

[Giuseppe]

Hello dennis,

You can get access to the chart parent by walking the visual tree of the control like this:

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.Charting;

namespace SilverlightApplication2
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

            DataSeries series = new DataSeries() { new DataPoint(1,10), new DataPoint(2,20), new DataPoint(3, 30) };
            RadChart1.DefaultView.ChartArea.DataSeries.Add(series);

            RadChart1.DefaultView.ChartArea.ChartItemClick += ChartArea_ChartItemClick;
        }

        private void ChartArea_ChartItemClick(object sender, ChartItemClickEventArgs e)
        {
            RadChart chart = GetVisualParent<RadChart>(e.OriginalSource as DependencyObject);
        }

        private static TParent GetVisualParent<TParent>(DependencyObject dependencyObject) where TParent : DependencyObject
        {
            DependencyObject parent = null;

            if (dependencyObject != null)
                parent = VisualTreeHelper.GetParent(dependencyObject);

            while ((parent != null) && !(parent is TParent))
            {
                parent = VisualTreeHelper.GetParent(parent);
            }

            return (TParent)parent;
        }
    }
}

We will also consider exposing the chart parent in a more straightforward manner for the future releases of the control.


Regards,
Manuel
the Telerik team

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