TextBox.BeforeTextChanging イベント

  • リファレンス

定義

名前空間:
Windows.UI.Xaml.Controls
編集

テキスト ボックス内のテキストの変更が開始され、 Text プロパティが更新される前に同期的に発生します。

// Register
event_token BeforeTextChanging(TypedEventHandler<TextBox, TextBoxBeforeTextChangingEventArgs const&> const& handler) const;

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

// Revoke with event_revoker
TextBox::BeforeTextChanging_revoker BeforeTextChanging(auto_revoke_t, TypedEventHandler<TextBox, TextBoxBeforeTextChangingEventArgs const&> const& handler) const;
public event TypedEventHandler<TextBox,TextBoxBeforeTextChangingEventArgs> BeforeTextChanging;
function onBeforeTextChanging(eventArgs) { /* Your code */ }
textBox.addEventListener("beforetextchanging", onBeforeTextChanging);
textBox.removeEventListener("beforetextchanging", onBeforeTextChanging);
- or -
textBox.onbeforetextchanging = onBeforeTextChanging;
Public Custom Event BeforeTextChanging As TypedEventHandler(Of TextBox, TextBoxBeforeTextChangingEventArgs) 
<TextBox BeforeTextChanging="eventhandler"/>

イベントの種類

TypedEventHandler<TextBox,TextBoxBeforeTextChangingEventArgs>

Windows の要件

デバイス ファミリ
Windows 10 Fall Creators Update (10.0.16299.0 で導入)
API contract
Windows.Foundation.UniversalApiContract (v5.0 で導入)

適用対象

こちらもご覧ください