ManualDateTimeScaleOptions.AutoGrid Property
Gets or sets a value that specifies whether the spacing of grid lines is calculated automatically based upon the major tickmarks of the axis.
Namespace: DevExpress.Xpf.Charts
Assembly: DevExpress.Xpf.Charts.v20.1.dll
NuGet Packages: DevExpress.WindowsDesktop.Wpf.Charts, DevExpress.Wpf.Charts
Declaration
Property Value
Type | Description |
---|---|
Boolean | true, if grid spacing is performed automatically; otherwise, false. |
Remarks
The AutoGrid property is tightly interrelated to the ManualDateTimeScaleOptions.GridSpacing property. Changing the value of one property affects the other. By default, the AutoGrid property is set to true and the grid line spacing is calculated automatically.
The following images demonstrate how the AutoGrid property works.
AutoGrid = true, GridSpacing=4 | AutoGrid = false, GridSpacing=1 |
---|---|
Example
This example demonstrates how to use the manual date-time scale options of the X-axis.
Data aggregation is enabled automatically for the date-time scale on the X-axis in both automatic and manual scale options.
When the AxisX2D.DateTimeScaleOptions property is set to ManualDateTimeScaleOptions, you can define the ManualDateTimeScaleOptions.GridAlignment, ManualDateTimeScaleOptions.MeasureUnit and ManualDateTimeScaleOptions.AggregateFunction properties manually.
To use the automatic date-time scale options, set the AxisX2D.DateTimeScaleOptions property to AutomaticDateTimeScaleOptions, and select the appropriate AutomaticDateTimeScaleOptions.AggregateFunction.
To prevent the axis scale from being divided into intervals (and thus prevent chart data from being aggregated), set the ManualDateTimeScaleOptions.AggregateFunction property to None.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-use-manual-date-time-scale-options-of-an-axis-t112240.
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
x:Class="WpfApplication19.MainWindow"
Title="MainWindow" Height="400" Width="525">
<Grid>
<dxc:ChartControl>
<dxc:XYDiagram2D >
<dxc:XYDiagram2D.AxisX>
<dxc:AxisX2D GridLinesMinorVisible="True" GridLinesVisible="True">
<dxc:AxisX2D.DateTimeScaleOptions>
<dxc:ManualDateTimeScaleOptions AggregateFunction="Maximum" AutoGrid="False"
GridAlignment="Year" MeasureUnit="Month"
GridSpacing="3" GridOffset="1"/>
</dxc:AxisX2D.DateTimeScaleOptions>
</dxc:AxisX2D>
</dxc:XYDiagram2D.AxisX>
<dxc:LineSeries2D DataSource="{Binding Path=Rate}"
ArgumentDataMember="Argument" ValueDataMember="Value" />
</dxc:XYDiagram2D>
</dxc:ChartControl>
</Grid>
</Window>