TextBox.SelectionChanging Ereignis

Definition

Namespace:

Windows.UI.Xaml.Controls

Tritt auf, wenn sich die Textauswahl zu ändern beginnt.

// Register
event_token SelectionChanging(TypedEventHandler<TextBox, TextBoxSelectionChangingEventArgs const&> const& handler) const;

// Revoke with event_token
void SelectionChanging(event_token const* cookie) const;

// Revoke with event_revoker
TextBox::SelectionChanging_revoker SelectionChanging(auto_revoke_t, TypedEventHandler<TextBox, TextBoxSelectionChangingEventArgs const&> const& handler) const;

public event TypedEventHandler<TextBox,TextBoxSelectionChangingEventArgs> SelectionChanging;

function onSelectionChanging(eventArgs) { /* Your code */ }
textBox.addEventListener("selectionchanging", onSelectionChanging);
textBox.removeEventListener("selectionchanging", onSelectionChanging);
- or -
textBox.onselectionchanging = onSelectionChanging;

Public Custom Event SelectionChanging As TypedEventHandler(Of TextBox, TextBoxSelectionChangingEventArgs) 

<TextBox SelectionChanging="eventhandler"/>

Ereignistyp

TypedEventHandler<TextBox,TextBoxSelectionChangingEventArgs>

Windows-Anforderungen

Gerätefamilie	Windows 10, version 1809 (eingeführt in 10.0.17763.0)
API contract	Windows.Foundation.UniversalApiContract (eingeführt in v7.0)

Weitere Informationen

• TextBoxSelectionChangingEventArgs