TextBox.SelectionChanging 事件

定義

命名空間:

Windows.UI.Xaml.Controls

發生于文字選取範圍開始變更時。

// 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"/>

事件類型

TypedEventHandler<TextBox,TextBoxSelectionChangingEventArgs>

Windows 需求

裝置系列	Windows 10, version 1809 (已於 10.0.17763.0 引進)
API contract	Windows.Foundation.UniversalApiContract (已於 v7.0 引進)

另請參閱

• TextBoxSelectionChangingEventArgs