HOW TO：使用 Smartphone 功能表
更新：2007 年 11 月
為了符合 Smartphone 使用者介面，.NET Compact Framework 會強制執行下列的功能表限制：
您只可以有兩個最上層的功能表項目
只有位於表單右側的第二個最上層功能表項目才能有子功能表
請注意，.NET Compact Framework 不會在設計階段強制執行這些限制，但若您的程式碼未遵循這些限制，則會在執行階段擲回 NotSupportedException。
在執行階段，您無法刪除最上層的功能表項目。但是，可以將 MenuItem 的 Enabled 屬性設定為空字串 ("")，使功能表項目不會顯示出來。
當您建立 Smartphone 和 Pocket PC 應用程式時，Visual Studio 會自動將 MainMenu 元件加入至表單，但不會將此元件加入至子表單。MainMenu 元件可操作 Smartphone 螢幕按鍵，但除非您從表單中移除 MainMenu 元件，否則無法為這些螢幕按鍵的功能設計程式。如需螢幕按鍵程式設計的詳細資訊，請參閱＜用 Smartphone 的返回鍵與螢幕按鈕＞(英文)。
若要使方法與功能表選取項目產生關聯，請針對 MenuItem 的 Click 事件提供程式碼。
範例
這個範例會定義在選取對應情況下的功能表系統：
左邊是 Map Help 功能表項目，此項目具有可顯示訊息方塊的事件處理程式碼。
右邊是 Maps 功能表項目，此項目有兩個子系：My Maps 和 Add and Remove。這些子系分別有五個和兩個子系。
Imports System
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
Private WithEvents mi1 As New MenuItem
Private mi2 As New MenuItem
Private miChildA As New MenuItem
Private miChildB As New MenuItem
Private WithEvents miGrandChildA1 As New MenuItem
Private WithEvents miGrandChildA2 As New MenuItem
Private WithEvents miGrandChildA3 As New MenuItem
Private WithEvents miGrandChildA4 As New MenuItem
Private WithEvents miGrandChildA5 As New MenuItem
Private WithEvents miGrandChildB1 As New MenuItem
Private WithEvents miGrandChildB2 As New MenuItem
Public Sub New()
MyBase.New()
InitializeComponent()
'Define and add menu items.
MainMenu1.MenuItems.Add(mi1)
MainMenu1.MenuItems.Add(mi2)
mi2.MenuItems.Add(miChildA)
mi2.MenuItems.Add(miChildB)
miChildA.MenuItems.Add(miGrandChildA1)
miChildA.MenuItems.Add(miGrandChildA2)
miChildA.MenuItems.Add(miGrandChildA3)
miChildA.MenuItems.Add(miGrandChildA4)
miChildA.MenuItems.Add(miGrandChildA5)
miChildB.MenuItems.Add(miGrandChildB1)
miChildB.MenuItems.Add(miGrandChildB2)
mi1.Text = "Map Help"
mi2.Text = "Maps"
miChildA.Text = "My Maps"
miChildB.Text = "Add and remove"
miGrandChildA1.Text = "Manhattan"
miGrandChildA2.Text = "Bronx"
miGrandChildA3.Text = "Brooklyn"
miGrandChildA4.Text = "Queens"
miGrandChildA5.Text = "Staten Island"
miGrandChildB1.Text = "Add map"
miGrandChildB2.Text = "Delete map"
End Sub
Public Shared Sub Main()
Application.Run(New Form1)
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
MyBase.Dispose(disposing)
End Sub
Private Sub InitializeComponent()
Me.MainMenu1 = New System.Windows.Forms.MainMenu()
Me.Menu = Me.MainMenu1
Me.Text = "Form1"
End Sub
' The following subroutine handles the
' Click event for the mi1 MenuItem.
Private Sub mi1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mi1.Click
MessageBox.Show("This is just a test.")
End Sub
End Class
using System;
using System.Windows.Forms;
namespace SmartphoneMenus
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.MainMenu mainMenu1;
private MenuItem mi1 = new MenuItem();
private MenuItem mi2 = new MenuItem();
private MenuItem miChildA = new MenuItem();
private MenuItem miChildB = new MenuItem();
private MenuItem miGrandChildA1 = new MenuItem();
private MenuItem miGrandChildA2 = new MenuItem();
private MenuItem miGrandChildA3 = new MenuItem();
private MenuItem miGrandChildA4 = new MenuItem();
private MenuItem miGrandChildA5 = new MenuItem();
private MenuItem miGrandChildB1 = new MenuItem();
private MenuItem miGrandChildB2 = new MenuItem();
public Form1()
{
InitializeComponent();
mainMenu1.MenuItems.Add(mi1);
mainMenu1.MenuItems.Add(mi2);
mi2.MenuItems.Add(miChildA);
mi2.MenuItems.Add(miChildB);
miChildA.MenuItems.Add(miGrandChildA1);
miChildA.MenuItems.Add(miGrandChildA2);
miChildA.MenuItems.Add(miGrandChildA3);
miChildA.MenuItems.Add(miGrandChildA4);
miChildA.MenuItems.Add(miGrandChildA5);
miChildB.MenuItems.Add(miGrandChildB1);
miChildB.MenuItems.Add(miGrandChildB2);
// Event handler for the top left menu.
mi1.Click +=new EventHandler(mi1_Click);
// Event handlers for grandchild menu items. This code is commented out
// because this example does not define their event handling methods.
// miGrandChildA1.Click +=new EventHandler(miGrandChildA1_Click);
// miGrandChildB1.Click +=new EventHandler(miGrandChildB1_Click);
// miGrandChildB2.Click +=new EventHandler(miGrandChildB2_Click);
mi1.Text = "Map Help";
mi2.Text = "Maps";
miChildA.Text = "My Maps";
miChildB.Text = "Add and remove";
miGrandChildA1.Text = "Manhattan";
miGrandChildA2.Text = "Bronx";
miGrandChildA3.Text = "Brooklyn";
miGrandChildA4.Text = "Queens";
miGrandChildA5.Text = "Staten Island";
miGrandChildB1.Text = "Add map";
miGrandChildB2.Text = "Remove map";
}
protected override void Dispose( bool disposing )
{
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.Menu = this.mainMenu1;
this.Text = "Form1";
}
static void Main()
{
Application.Run(new Form1());
}
// The following method handles the
// Click event for the mi1 MenuItem.
private void mi1_Click(object sender, EventArgs e)
{
MessageBox.Show("This is just a test.");
}
}
}
編譯程式碼
這個範例需要下列命名空間的參考：