ToolStripComboBox.TextUpdate 事件


發生於 ToolStripComboBox 文字變更時。Occurs when the ToolStripComboBox text has changed.

 event EventHandler ^ TextUpdate;
public event EventHandler TextUpdate;
member this.TextUpdate : EventHandler 
Public Custom Event TextUpdate 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 TextUpdate 事件的發生。In the example, an event handler reports on the occurrence of the TextUpdate 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,請考慮使用 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,請將它貼入專案,其中包含名為 ToolStripComboBox1ToolStripComboBox 類型的實例。To run the example code, paste it into a project that contains an instance of type ToolStripComboBox named ToolStripComboBox1. 然後確定事件處理常式與 TextUpdate 事件相關聯。Then ensure that the event handler is associated with the TextUpdate event.

private void ToolStripComboBox1_TextUpdate(Object sender, EventArgs e) {

   MessageBox.Show("You are in the ToolStripComboBox.TextUpdate event.");
Private Sub ToolStripComboBox1_TextUpdate(sender as Object, e as EventArgs) _ 
     Handles ToolStripComboBox1.TextUpdate

   MessageBox.Show("You are in the ToolStripComboBox.TextUpdate 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.