protected override void SetupChart()
{
var items = HierarchicalDataSource.GetGroupedData("Country");
manager = new DrillDownManager(items, "Value", "Name");
manager.GroupNames.AddRange(new string[] { "Country", "City", "Year", "Month", "Day" });
manager.BeforeDrill += Manager_BeforeDrill;
manager.AfterDrill += Manager_AfterDrill;
manager.Refresh();
//FlexChart settings
flexChart1.BindingX = "Name";
flexChart1.Binding = "Value";
flexChart1.Series.Add(new Series()
{
Name = "Value"
});
flexChart1.DataSource = manager.CurrentItems.Views;
flexChart1.ToolTip.Content = "X:{x}\nY:{Value}";
flexChart1.DataLabel.Style.Font = new Font("Segoe UI", 9);
flexChart1.DataLabel.Position = C1.Chart.LabelPosition.Top;
flexChart1.DataLabel.Content = "{y}";
flexChart1.AxisY.Format = "#,##0,K";
flexChart1.Header.Style.Font = StyleInfo.ChartHeaderFont;
flexChart1.MouseClick += ChartMouseClick;
}
private Task <IEnumerable <object> > FetchDataAsync(int drilldownLevel)
{
return(System.Threading.Tasks.Task.Factory.StartNew(() =>
{
IEnumerable <object> data = null;
switch (drilldownLevel)
{
case 0:
data = HierarchicalDataSource.GetGroupedData("Country", _currentValue, "City");
break;
case 1:
data = HierarchicalDataSource.GetGroupedData("City", _currentValue, "Year");
break;
case 2:
data = HierarchicalDataSource.GetGroupedData("Year", _currentValue, "Month");
break;
case 3:
data = HierarchicalDataSource.GetGroupedData("Month", _currentValue, "Day");
break;
default:
break;
}
return data;
}));
}