Pie Chart question

[Quyen]

Hi All :) ,

is it possible know the region area when the user click on a pie chart ?

For example:

I have a pie chart that displays the number of schedules jobs that that runs on a daily basis;  let say 40 jobs failed and 50 succeed .. I want to know if it is possible
to know if the users clicks on Failures region it will fires an event  to drill down a grid and show the details of these jobs?


Thanks In Advance

[Dwight]

Hi Quyen,

Thank you for contacting us. The click event of the RadChart exposes the following information through the ChartClickEventArgs:

• SeriesItem - the item that have been clicked.
• Series - the series to which the item belongs.

Here is a short example demonstrating the functionality would like to implement:

        public Form3()
        {
            InitializeComponent();

            //hook up the event handler
            radChart1.Click += new Telerik.WinControls.UI.RadChart.ChartClickEventHandler(this.radChart1_Click);

            radChart1.Series.Clear();

            //create series
            radChart1.CreateSeries("Outcomes", Color.Black, Color.Black, ChartSeriesType.Pie);

            //add items
            ChartSeriesItem csi = new ChartSeriesItem();
            csi.Name = "Successes";
            csi.YValue = 55;
            radChart1.Series[0].Items.Add(csi);

            ChartSeriesItem csi1 = new ChartSeriesItem();
            csi1.Name = "Failures";
            csi1.YValue = 5;
            radChart1.Series[0].Items.Add(csi1);
            //refresh the chart
            radChart1.UpdateGraphics();
        }

        private void radChart1_Click(object sender, ChartClickEventArgs args)
        {
            if (args.Element.ActiveRegion.Parent is ChartSeriesItem)
            {
                MessageBox.Show((args.Element.ActiveRegion.Parent as ChartSeriesItem).Name + " pie sector clicked");
                if ((args.Element.ActiveRegion.Parent as ChartSeriesItem).Name.Equals("Failures"))
                {
                    MessageBox.Show("Place custom code to show failures here");
                }
            }
        }

Please, let us know if that helps. If you have further questions, do not hesitate to ask.

All the best,
Evtim
the Telerik team

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