AppearanceAttribute.Enabled Property

Specifies whether to enable UI elements affected by the conditional appearance rule generated from this attribute instance.

Namespace: DevExpress.ExpressApp.ConditionalAppearance

Assembly: DevExpress.Persistent.Base.v23.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public bool Enabled { get; set; }

VB.NET

Public Property Enabled As Boolean

Property Value

Type	Description
Boolean	true, if UI elements affected by the conditional appearance rule must be enabled; otherwise, false.

Remarks

The following UI elements can be made disabled/enabled:

• Data cells in a GridListEditor and ASPxGridListEditor when switching to the inline editing mode
• Property Editors that are inherited from the PropertyEditor class.
• Actions

You can find many examples in the Declare Conditional Appearance Rules in Code topic. See these examples in the Feature Center demo installed with the XAF in the %PUBLIC%\Documents\DevExpress Demos 23.2\Components\XAF\FeatureCenter.NETFramework.XPO folder, or refer to the Feature Center demo online.

The example below demonstrates how to disable the NickName property editor in the Contact Detail View.

C# (EF Core)

using System;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Actions;
using DevExpress.Persistent.Base;
// ...
public class Contact : BaseObject {
    // ...
    [Appearance("NickNameDisabled", Context = "Contact_DetailView", AppearanceItemType = "ViewItem", Enabled = false)]
    public virtual string NickName { get; set; }
}

// Make sure that you use options.UseChangeTrackingProxies() in your DbContext settings.

C# (XPO)

using System;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Actions;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
// ...
public class Contact : BaseObject {
// ...
    [Appearance("NickNameDisabled", Context = "Contact_DetailView", AppearanceItemType = "ViewItem", Enabled = false)]
    public string NickName {
        get {
            return nickName;
        }
        set {
            SetPropertyValue(nameof(NickName), ref nickName, value);
        }
    }
}

VB.NET (XPO)

Imports System
Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.Actions
Imports DevExpress.Persistent.Base
Imports DevExpress.Persistent.BaseImpl
' ...
Public Class Contact
    Inherits BaseObject
' ...
    <Appearance("NickNameDisabled", Context := "Contact_DetailView", AppearanceItemType := "ViewItem", _
    Enabled := False)>
    Public Property NickName() As String
        Get
            Return nickName
        End Get
        Set(ByVal value As String)
            SetPropertyValue(NameOf(NickName), nickName, value)
        End Set
    End Property