dashboard-devexpress-dot-dashboardwin-dot-dashboarditemcontroleventargs-bec5fd25.md
Gets the chart context.
Namespace : DevExpress.DashboardWin
Assembly : DevExpress.Dashboard.v25.2.Win.dll
NuGet Package : DevExpress.Win.Dashboard
public ChartContext ChartContext { get; }
Public ReadOnly Property ChartContext As ChartContext
| Type | Description |
|---|---|
| ChartContext |
A context used to provide a connection between data item containers from the Values section and underlying control’s series.
|
A chart context provides the connection between dashboard data item containers from the Values section and the underlying control’s series. The GetControlSeries method returns a data item container that corresponds to the specified control’s series. The GetDashboardItemColumn method, in turn, gets a collection of the control’s series that corresponds to the specified data item containers from the Values section.
The following code shows how to change the standard line to a line consisting of a repeating pattern of dash-dot. The Chart contains two panes with Total Sum and Quantity data items. The series contains two values. The DashboardDesigner.DashboardItemControlUpdated event is used to update the Chart’s appearance.
using DevExpress.DashboardCommon;
using DevExpress.DashboardWin;
using DevExpress.XtraCharts;
// ...
private void DashboardDesigner1_DashboardItemControlUpdated(object sender, DashboardItemControlEventArgs e) {
if(e.ChartControl != null) {
DashboardDesigner designer = (DashboardDesigner)sender;
var chartDashboardItem = designer.Dashboard.Items[e.DashboardItemName] as ChartDashboardItem;
foreach(var pane in chartDashboardItem.Panes) {
if(pane.Series.Count > 0) {
foreach(var dashSeries in pane.Series) {
if(dashSeries != null) {
var controlSeries = e.ChartContext.GetChartSeries(dashSeries);
if(controlSeries != null) {
foreach(var ser in controlSeries) {
LineSeriesView view = ser.View as LineSeriesView;
if(view != null) {
view.LineStyle.DashStyle = DashStyle.DashDot;
}
}
}
}
}
}
}
}
}
Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardWin
Imports DevExpress.XtraCharts
' ...
Private Sub DashboardDesigner1_DashboardItemControlUpdated(ByVal sender As Object, ByVal e As DashboardItemControlEventArgs)
Private Sub DashboardDesigner1_DashboardItemControlUpdated(ByVal sender As Object, ByVal e As DashboardItemControlEventArgs)
If e.ChartControl IsNot Nothing Then
Dim designer As DashboardDesigner = CType(sender, DashboardDesigner)
Dim chartDashboardItem = TryCast(designer.Dashboard.Items(e.DashboardItemName), ChartDashboardItem)
For Each pane In chartDashboardItem.Panes
If pane.Series.Count > 0 Then
For Each dashSeries In pane.Series
If dashSeries IsNot Nothing Then
Dim controlSeries = e.ChartContext.GetChartSeries(dashSeries)
If controlSeries IsNot Nothing Then
For Each ser In controlSeries
Dim view As LineSeriesView = TryCast(ser.View, LineSeriesView)
If view IsNot Nothing Then
view.LineStyle.DashStyle = DashStyle.DashDot
End If
Next ser
End If
End If
Next dashSeries
End If
Next pane
End If
End Sub
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ChartContext property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
if(e.ChartControl != null && designer.Dashboard.Items[e.DashboardItemName] is ChartDashboardItem chartDashboardItem)
UpdateChart(chartDashboardItem, e.ChartContext);
}
If e.ChartControl IsNot Nothing AndAlso tempVar Then
UpdateChart(chartDashboardItem, e.ChartContext)
End If
See Also
DashboardItemControlEventArgs Class