Add tooltips to Polar Chart

[Alberto]

Hi,

I am testing some controls including the polar chart, I load some data from a database into a DataTable like this:

DataTable dtData = new DataTable();

dtData.Columns.Add(new DataColumn("Name", typeof(string)));

dtData.Columns.Add(new DataColumn("Value", typeof(double)));

DataRow drCost;

RadarLineSeries rs = new RadarLineSeries();

foreach (DataRow dr in dtData.Rows)
{
CategoricalDataPoint dp = new CategoricalDataPoint();
dp.Category = dr["Name"].ToString();
dp.Value = double.Parse(dr["Value"].ToString());

rs.DataPoints.Add(dp);
}

rs.Stroke = new SolidColorBrush(Color.FromRgb(37, 160, 219));

RadarChartDemo.Series.Add(rs);


And the result is something like the attached image.

I would like to add tooltips to each point to see the values, does anyone knows how can I do this?

Thanks,

Alberto

[Petar Kirov]

Hi Alberto,

In order to add a tooltip, you will need to add a ChartTooltipBehavior to the RadPolarChart.Behaviors collection. Note that, if you are using Line, Spline (applicable only to RadCartesianChart) or Area series, you will need to have defined a PointTemplate which you can hover, in order to get a tooltip.  Here you can learn more about this. 

If you want to learn how to bind your chart to a DataTable, you can check this article.
 
Regards,
Petar Kirov
Telerik