TreeListView.CustomDataUpdateFormatCondition Event

Allows defining a custom logic of conditional formatting of the changed grid cells (rows).

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v24.2.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event EventHandler<CustomDataUpdateFormatConditionEventArgs> CustomDataUpdateFormatCondition

VB.NET

Public Event CustomDataUpdateFormatCondition As EventHandler(Of CustomDataUpdateFormatConditionEventArgs)

Event Data

The CustomDataUpdateFormatCondition event's data class is CustomDataUpdateFormatConditionEventArgs. The following properties provide information specific to this event:

Property	Description
Allow	Gets or sets whether the formatting should be applied to a processed cell (row).
Condition	Gets the currently processed format condition.
NewValue	Gets the new cell value.
OldValue	Gets the previous cell value.

Remarks

Use the DataUpdateFormatCondition.Rule property to set a rule that determines whether the data update formatting is applied.

To define a custom logic, set the DataUpdateFormatCondition.Rule property to DataUpdateRule.Custom and handle the CustomDataUpdateFormatCondition (or TableView.CustomDataUpdateFormatCondition) event.

The code sample below shows how to define a custom logic for conditional formatting.

XAML

<dxg:TreeListView x:Name="view" CustomDataUpdateFormatCondition="view_CustomDataUpdateFormatCondition">
   <dxg:TreeListView.FormatConditions>
      <dxg:DataUpdateFormatCondition FieldName="DeltaPrice" Rule="Custom" PredefinedFormatName="LightRedFillWithDarkRedText" />
   </dxg:TreeListView.FormatConditions>
</dxg:TreeListView>

C#

private void view_CustomDataUpdateFormatCondition(object sender, CustomDataUpdateFormatConditionEventArgs e) {
   if((decimal)e.NewValue < 0)
      e.Allow = true;
   e.Condition.ApplyToRow = true;
}