CheckedComboBoxStyleSettings.ShowSelectAllItem Property

Gets or sets whether the checked combo box displays the Select All item. This is a dependency property.

Namespace: DevExpress.Xpf.Editors

Assembly: DevExpress.Xpf.Core.v23.2.dll

NuGet Package: DevExpress.Wpf.Core

Declaration

C#

public bool ShowSelectAllItem { get; set; }

VB.NET

Public Property ShowSelectAllItem As Boolean

Property Value

Type	Description
Boolean	true, to show the Select All item; otherwise, false.

Remarks

ComboBoxEdit can display the Select All item above its other items. When an end-user clicks the Select All item, all the editor’s items are selected.

Use the ShowSelectAllItem property to control the availability of the Select All item in the combo box dropdown list. The SelectAllItemText property allows you to change the default Select All item’s text.

The image below illustrates the Select All item with the default text.

The code sample below demonstrates how to enable the Select All item.

Xaml

 <dxe:ComboBoxEdit>
    <dxe:ComboBoxEdit.StyleSettings>
        <dxe:CheckedComboBoxStyleSettings ShowSelectAllItem="True"/>
    </dxe:ComboBoxEdit.StyleSettings>
    <dxe:ComboBoxEditItem Content="Item 1"/>
    <dxe:ComboBoxEditItem Content="Item 2"/>
    <dxe:ComboBoxEditItem Content="Item 3"/>
</dxe:ComboBoxEdit>