Boolean Properties

• May 31, 2023
• 2 minutes to read

In XAF, the following controls can display Boolean and Nullable Boolean properties:

• A checkbox control (default).
• A drop-down control that displays Boolean values as custom text strings. You can use the IModelCommonMemberViewItem.CaptionForTrue and IModelCommonMemberViewItem.CaptionForFalse properties to specify these strings in the Application Model.
• A drop-down control can display Boolean values as custom text strings accompanied by images. You can define these strings in the same manner as for a drop-down control. Use the IModelCommonMemberViewItem.ImageForTrue and IModelCommonMemberViewItem.ImageForFalse properties to assign images for the true and false values. This option is available in WinForms and ASP.NET Web Forms applications only.

Refer to the following topics for more ORM-specific information on Boolean properties:

• Boolean Properties in XPO
• Boolean Properties in EF Core

ASP.NET Core Blazor

In ASP.NET Core Blazor, BlazorPropertyEditorBase.ComponentModel returns an IComponentModel descendant that wraps properties and events of a corresponding ASP.NET Core Blazor Editor.

The table below lists the corresponding descendants for BooleanPropertyEditor:

IComponentContentHolder descendant	Component	Description
DevExpress.ExpressApp.Blazor.Editors.Adapters.DxCheckBoxAdapter<T>	DxCheckBox<T>	The default control.
DevExpress.ExpressApp.Blazor.Editors.Adapters.DxComboBoxAdapter<TData, TValue>	DxComboBox<TData, TValue>	This component is used when one of the following property pairs is specified: CaptionForFalse and CaptionForTrue ImageForFalse and ImageForTrue

WinForms

Each Windows Forms Property Editor is available in two forms:

• A standalone control (displays property value in a Detail View)
• A repository item (displays property value in a List Editor that supports in-place editing)

The following table shows available controls and repository items for BooleanPropertyEditor:

Control	Repository item	Description
BooleanEdit (a CheckEdit descendant).	RepositoryItemBooleanEdit (a RepositoryItemCheckEdit descendant).	A CheckEdit control (default).
BoolComboBoxEdit (an ImageComboBoxEdit descendant).	RepositoryItemBoolComboBoxEdit (a RepositoryItemImageComboBox descendant).	A drop-down control with custom text. An optional image is displayed next to the text when one of the following property pairs is specified: CaptionForFalse and CaptionForTrue ImageForFalse and ImageForTrue

ASP.NET Web Forms

Each ASP.NET Web Forms Property Editor includes controls that display a property in a Detail View in View and Edit mode.

The following table shows available controls and repository items for ASPxBooleanPropertyEditor:

View mode control	Edit mode controls	Description
ASPxCheckBox	ASPxCheckBox	The default control.
ASPxImageLabelControl	ASPxComboBox	These controls are used when one of the following property pairs is specified: CaptionForFalse and CaptionForTrue ImageForFalse and ImageForTrue