ChartItemClick in UI for Silverlight

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ChartItemClick

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Chart

This is a migrated thread and some comments may be shown as answers.

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answered on 23 Mar 2009, 10:51 AM

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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