Issue setting the z-index of a PointMark in a Line Series Chart

[Ruby Jean]

Hi, 

I have trouble setting the ZIndex of a point mark in my line series chart. I only followed the ones in your sample for the Bubble series. Here is my code:

private void ChartArea_ItemClick(object sender, ChartItemClickEventArgs e)
{
   BringToFrontDataPointControl(Chart.DefaultView.ChartArea.ChildrenOfType<PointMark>()
      .ToList<PointMark>().Where(x => x.DataContext == e.DataPoint).SingleOrDefault());
}

private void BringToFrontDataPointControl(Control ctrl)
{
   if (ctrl is PointMark)
   {
        var pointMarkList = Chart.DefaultView.ChartArea.ChildrenOfType<PointMark>().ToList<PointMark>();
        pointMarkList.ForEach(delegate(PointMark current)
        {
             if (current.Equals(ctrl as PointMark))
                Canvas.SetZIndex(current, 100000);
             else
               current.ClearValue(Canvas.ZIndexProperty);
        });
   }
}

Hope you could help me on this.

Cheers,
Byang

[Petar Kirov]

Hi Ruby,

To make this code work you need to change every occurrence of PointMark with Bubble, because the visual element that represent the BubbleSeries' data points is of type Telerik.Windows.Controls.Charting.Bubble. 

I would recommend using a tool for visual debugging such as XAML Spy, or WPF Inspector when, so you can easily examine the visual tree and find the information you need.

All the best,
Petar Kirov
the Telerik team

[Ruby Jean]

Thanks for the response and the advise on using XamlSpy.

I am actually using a Line Series not a Bubble Series so for that reason I couldn't change PointMark to Bubble however I used Telerik.Windows.Controls.Charting.Line after seeing in XamlSpy that its a parent of the point mark. After setting the ZIndex of the Line it works. Thanks again and more power.