SelectItem question

[Normand]

Hi,

 

I have a Pie Chart and the following code:

 

DataSeries series = new DataSeries();
series.Definition = new PieSeriesDefinition();
series.Definition.InteractivitySettings.SelectionMode = ChartSelectionMode.Single;
series.Definition.InteractivitySettings.SelectionScope = InteractivityScope.Item;

series.Add(new DataPoint(1));
series.Add(new DataPoint(2));
series.Add(new DataPoint(3));
series.Add(new DataPoint(4));
radChart.DefaultView.ChartArea.DataSeries.Add(series);
radChart.DefaultView.ChartArea.SelectItem(0);

 

What I would like to do is to “pre-select” an item immediately after generating the chart. However, the SelectItem in my code doesn’t work because it seems the SelectItem needs the chart to first be rendered. If I call the SelectItem from a timer (and then the chart has been rendered), then it works. Is there a way to call the SelectItem when the chart hasn’t been rendered? Or is there a way to know when the chart and the different elements  have been generated so that the SelectItem will work?

 

Thanks!

[Tsvetie]

Hello Normand,
You can use the following approach:

DataSeries series = new DataSeries();
series.Definition = new PieSeriesDefinition();
series.Definition.InteractivitySettings.SelectionMode = ChartSelectionMode.Single;
series.Definition.InteractivitySettings.SelectionScope = InteractivityScope.Item;

series.Add(new DataPoint(1));
series.Add(new DataPoint(2));
series.Add(new DataPoint(3));
series.Add(new DataPoint(4));
RadChart1.DefaultView.ChartArea.DataSeries.Add(series);

Dispatcher.BeginInvoke((Action)(() => RadChart1.DefaultView.ChartArea.SelectItem(0)));

Regards,
Tsvetie
the Telerik team