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.
true to allow null input by pressing the CTRL+DEL or CTRL+0 key combinations; otherwise, false.
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).
The CTRL + 0 key combination does not work when using a French or German keyboard.
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.