Control.HandleCreated Control.HandleCreated Control.HandleCreated Control.HandleCreated Event

定義

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

public:
 event EventHandler ^ HandleCreated;
[System.ComponentModel.Browsable(false)]
public event EventHandler HandleCreated;
member this.HandleCreated : EventHandler 
Public Custom Event HandleCreated As EventHandler 
屬性

範例

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. 在範例中,事件處理常式會報告一次HandleCreated事件。In the example, an event handler reports on the occurrence of the HandleCreated event. 此報表可協助您了解事件發生的時機,並可協助您偵錯。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事件經常發生,請考慮更換MessageBox.Show具有Console.WriteLine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,將它貼至專案,其中包含繼承自類型的執行個體Control,這類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. 然後將其命名執行個體Control1,並確保與關聯的事件處理常式HandleCreated事件。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

備註

控制代碼時,會建立Control顯示第一次。A handle is created when the Control is displayed for the first time. 比方說,如果Control會建立具有Visible設為false,則HandleCreated之前不會引發事件Visible設為trueFor 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.

如需有關如何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.

適用於

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