TextPattern.TextChangedEvent 欄位
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
識別修改文字內容時所引發的事件。
public: static initonly System::Windows::Automation::AutomationEvent ^ TextChangedEvent;public static readonly System.Windows.Automation.AutomationEvent TextChangedEvent; staticval mutable TextChangedEvent : System.Windows.Automation.AutomationEventPublic Shared ReadOnly TextChangedEvent As AutomationEvent 欄位值
範例
// Initialize a text changed listener.
// An instance of TextPatternRange will become invalid if
// one of the following occurs:
// 1) The text in the provider changes via some user activity.
// 2) ValuePattern.SetValue is used to programatically change
// the value of the text in the provider.
// The only way the client application can detect if the text
// has changed (to ensure that the ranges are still valid),
// is by setting a listener for the TextChanged event of
// the TextPattern. If this event is raised, the client needs
// to update the targetDocumentRange member data to ensure the
// user is working with the updated text.
// Clients must always anticipate the possibility that the text
// can change underneath them.
Automation.AddAutomationEventHandler(
TextPattern.TextChangedEvent,
targetDocument,
TreeScope.Element,
TextChanged);
' Initialize a text changed listener.
' An instance of TextPatternRange will become invalid if
' one of the following occurs:
' 1) The text in the provider changes via some user activity.
' 2) ValuePattern.SetValue is used to programatically change
' the value of the text in the provider.
' The only way the client application can detect if the text
' has changed (to ensure that the ranges are still valid),
' is by setting a listener for the TextChanged event of
' the TextPattern. If this event is raised, the client needs
' to update the targetDocumentRange member data to ensure the
' user is working with the updated text.
' Clients must always anticipate the possibility that the text
' can change underneath them.
Dim onTextChanged As AutomationEventHandler = _
New AutomationEventHandler(AddressOf TextChanged)
Automation.AddAutomationEventHandler( _
TextPattern.TextChangedEvent, targetDocument, TreeScope.Element, onTextChanged)
備註
消費者介面自動化用戶端應用程式會使用此識別碼。 消費者介面自動化提供者應該使用 中的 TextPatternIdentifiers 對等欄位。
