Hi Akhil,
Using the FormatExpressions for the Series Definition's ItemLabelFormat won't be helpful to you as you can't have such complex format in it. In fact you'll have to prepare the format for the value at the time you bind the chart. The following sample demonstrates what I mean:
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
List<TradeData> data = new List<TradeData>();
Random r = new Random();
for (int i = 0; i < 10; i++)
{
data.Add(new TradeData() { Value = i, Minutes = r.Next(0, 2000) });
}
radChart.ItemsSource = data;
SeriesMapping mappingStartUpTime = new SeriesMapping();
ItemMapping timeMappingTime = new ItemMapping("SecondsFormatted", DataPointMember.Label);
ItemMapping timeMapping = new ItemMapping("Minutes", DataPointMember.YValue);
timeMappingTime.FieldType = typeof(double);
timeMapping.FieldType = typeof(double);
mappingStartUpTime.ItemMappings.Add(timeMappingTime);
mappingStartUpTime.ItemMappings.Add(timeMapping); ;
radChart.SeriesMappings.Add(mappingStartUpTime);
}
public class TradeData
{
public double Value
{
get;
set;
}
public double Minutes
{
get;
set;
}
public string SecondsFormatted
{
get
{
TimeSpan formattedValue = TimeSpan.FromMinutes(Minutes);
return (
string.Format("{0:00}:{1:00}:{2:00}", formattedValue.Days, formattedValue.Hours, formattedValue.Minutes)
);
}
}
}
}
I used another string property (SecondsFormatted) which returns the formatted minutes of a TimeSpan. Then bound it to the Label DataPointMember of RadChart's ItemMapping (marked in yellow) and voilà.
Regards,
Evgenia
the Telerik team