ToolStripDropDown.ChangeUICues 事件

定义

焦点或键盘用户界面 (UI) 提示更改时发生。

public:
 event System::Windows::Forms::UICuesEventHandler ^ ChangeUICues;
[System.ComponentModel.Browsable(false)]
public event System.Windows.Forms.UICuesEventHandler ChangeUICues;
[System.ComponentModel.Browsable(false)]
public event System.Windows.Forms.UICuesEventHandler? ChangeUICues;
[<System.ComponentModel.Browsable(false)>]
member this.ChangeUICues : System.Windows.Forms.UICuesEventHandler 
Public Custom Event ChangeUICues As UICuesEventHandler 

事件类型

属性

示例

下面的代码示例演示了此成员的用法。 在此示例中,事件处理程序报告事件的发生情况 ChangeUICues 。 此报表可帮助你了解事件发生的时间,并可以帮助你进行调试。 若要报告多个事件或频繁发生的事件,请考虑将 MessageBox.Show 替换为 Console.WriteLine 或将消息追加到多行 TextBox

若要运行示例代码,请将其粘贴到包含名为 ToolStripDropDown1的 类型的ToolStripDropDown实例的项目中。 然后,确保事件处理程序与 ChangeUICues 事件相关联。

private void ToolStripDropDown1_ChangeUICues(Object sender, UICuesEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ShowFocus", e.ShowFocus );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ShowKeyboard", e.ShowKeyboard );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ChangeFocus", e.ChangeFocus );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ChangeKeyboard", e.ChangeKeyboard );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Changed", e.Changed );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "ChangeUICues Event" );
}
Private Sub ToolStripDropDown1_ChangeUICues(sender as Object, e as UICuesEventArgs) _ 
     Handles ToolStripDropDown1.ChangeUICues

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "ShowFocus", e.ShowFocus)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "ShowKeyboard", e.ShowKeyboard)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "ChangeFocus", e.ChangeFocus)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "ChangeKeyboard", e.ChangeKeyboard)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Changed", e.Changed)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"ChangeUICues Event")

End Sub

注解

有关处理事件的详细信息,请参阅 处理和引发事件

适用于