AppearanceAttribute.Visibility Property

Specifies the visibility of UI elements affected by the conditional appearance rule generated from this attribute instance.

Namespace: DevExpress.ExpressApp.ConditionalAppearance

Assembly: DevExpress.Persistent.Base.v25.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public ViewItemVisibility Visibility { get; set; }

VB.NET

Public Property Visibility As ViewItemVisibility

Property Value

Type	Description
ViewItemVisibility	A ViewItemVisibility enumeration value specifying the visibility of UI elements affected by the conditional appearance rule.

Available values:

Name	Description
Hide	Specifies that UI elements affected by a conditional appearance rule are hidden, and the Detail View’s layout is rearranged.
ShowEmptySpace	Specifies that empty space is displayed instead of UI elements affected by a conditional appearance rule, when AppearanceAttribute.AppearanceItemType is set to ViewItem or LayoutItem. In XAF ASP.NET Core Blazor applications, this mode functions like the ViewItemVisibility.Hide mode.
Show	Specifies that UI elements affected by a conditional appearance rule remain visible (has effect in List View only).

Remarks

The following UI elements can be made invisible/visible:

• Property Editors that are inherited from the PropertyEditor class;
• Layout Items, Layout Groups and Tabbed Layout Groups;
• Actions;
• Data columns in a GridListEditor, ASPxGridListEditor, TreeListEditor and ASPxTreeListEditor when the appearance rule’s criterion doesn’t require information on the current View’s objects. So the criteria can be like “1=1” or a criteria using a Function Criteria Operator that is not based on the current object properties. This feature is considered as an unnatural scenario and described in the Conditional Appearance Module Overview topic.

Note

The Show value of the Visibility property has effect in List Views only, when it is required to unhide a column (see the Show and Hide List View Columns section of the Conditional Appearance Module Overview topic).

You can find many examples in the Declare Conditional Appearance Rules in Code topic.

Tip

You can find examples of this functionality in the MainDemo demo included with XAF. The demo illustrates various XAF features (including Appearance attribute) and is located in the %PUBLIC%\Documents\DevExpress Demos 25.2\Components\XAF\MainDemo.NET.EFCore folder.