CheckBox.CheckedChanged 事件


發生於 Checked 屬性的值變更時。Occurs when the value of the Checked property changes.

 event EventHandler ^ CheckedChanged;
public event EventHandler CheckedChanged;
member this.CheckedChanged : EventHandler 
Public Custom Event CheckedChanged 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事件的發生次數 CheckedChangedIn the example, an event handler reports on the occurrence of the CheckedChanged 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,請考慮將取代 MessageBox.Show 為, Console.WriteLine 或將訊息附加至多行 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,請將它貼入包含名為之類型實例的專案中 CheckBox CheckBox1To run the example code, paste it into a project that contains an instance of type CheckBox named CheckBox1. 然後確定事件處理常式與事件相關聯 CheckedChangedThen ensure that the event handler is associated with the CheckedChanged event.

private void CheckBox1_CheckedChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the CheckBox.CheckedChanged event.");
Private Sub CheckBox1_CheckedChanged(sender as Object, e as EventArgs) _ 
     Handles CheckBox1.CheckedChanged

   MessageBox.Show("You are in the CheckBox.CheckedChanged event.")

End Sub


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.