Control.HandleCreated 事件


發生於為控制項建立控制代碼時。Occurs when a handle is created for the control.

 event EventHandler ^ HandleCreated;
public event EventHandler HandleCreated;
member this.HandleCreated : EventHandler 
Public Custom Event HandleCreated As EventHandler 


下列程式碼範例示範如何使用這個成員。The following code example demonstrates the use of this member. 在此範例中,事件處理常式會報告 HandleCreated 事件的發生次數。In the example, an event handler reports on the occurrence of the HandleCreated event. 此報表可協助您瞭解事件發生的時間,並可協助您進行調試。This report helps you to learn when the event occurs and can assist you in debugging. 若要報告多個事件或經常發生的事件,請考慮以 Console.WriteLine 取代 MessageBox.Show,或將訊息附加到多行 TextBoxTo report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

若要執行範例程式碼,請將它貼到專案中,其中包含繼承自 Control 的類型實例,例如 ButtonComboBoxTo run the example code, paste it into a project that contains an instance of a type that inherits from Control, such as a Button or ComboBox. 然後將實例命名為 Control1,並確定事件處理常式與 HandleCreated 事件相關聯。Then name the instance Control1 and ensure that the event handler is associated with the HandleCreated event.

private void Control1_HandleCreated(Object sender, EventArgs e) {

   MessageBox.Show("You are in the Control.HandleCreated event.");

Private Sub Control1_HandleCreated(sender as Object, e as EventArgs) _ 
     Handles Control1.HandleCreated

   MessageBox.Show("You are in the Control.HandleCreated event.")

End Sub


第一次顯示 Control 時,會建立控制碼。A handle is created when the Control is displayed for the first time. 例如,如果建立的 ControlVisible 設定為 false,則在 Visible 設定為 true 之前,不會引發 HandleCreated 事件。For example, if a Control is created that has Visible set to false, the HandleCreated event will not be raised until Visible is set to true.

如需處理事件的詳細資訊,請參閱處理和引發事件For more information about handling events, see Handling and Raising Events.