BaseEdit.AllowNullInput Property

Gets or sets whether end-users can set the editor’s value to a null reference by pressing the CTRL+DEL or CTRL+0 key combinations. This is a dependency property.

Namespace: DevExpress.Xpf.Editors

Assembly: DevExpress.Xpf.Core.v19.1.dll

Declaration

C#

public bool AllowNullInput { get; set; }

VB.NET

Public Property AllowNullInput As Boolean

Property Value

Type	Description
Boolean	true to allow null input by pressing the CTRL+DEL or CTRL+0 key combinations; otherwise, false.

Remarks

If the AllowNullInput property is set to true, end-users can set the editor’s value to a null reference by pressing the CTRL+DEL or CTRL+0 key combinations. If the BaseEdit.NullValue property is specified, its value is assigned to the BaseEdit.EditValue property. Otherwise, the BaseEdit.EditValue property is set to null (Nothing in Visual Basic).

Note

The CTRL + 0 key combination does not work when using a French or German keyboard.

Note

By default, if an end-user clears the text displayed within the edit box, the BaseEdit.EditValue property is set to a null reference. The AllowNullInput property is not in effect in this instance.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the AllowNullInput property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-cache-views-in-dxtabcontrol-t328343/CS/DXTabControlExample/MainWindow.xaml#L13

<Grid>
    <dxe:ComboBoxEdit AllowNullInput="False" IsTextEditable="False" VerticalAlignment="Top" Name="cacheModeComboBox">
        <dxe:ComboBoxEdit.EditValue>

how-to-format-display-values-via-composite-formatting-e3399/VB/Composite Formatting Sample/MainWindow.xaml#L24

    NullText="Null"
    AllowNullInput="True" VerticalAlignment="Center">
<dxe:SpinEdit.EditValue>

Reporting_wpf-end-user-report-designer-how-to-hide-a-property-in-the-properties-window-t285448/CS/Dictionary1.xaml#L181

PopupMinHeight="100"
AllowNullInput="True"
ShowNullText="False"