form1.cs

150个经典的入门学习程序源代码

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Example018_向窗体的系统菜单添加菜单项
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem2;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem2});
			this.menuItem1.Text = "File";
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 0;
			this.menuItem2.Text = "Exit";
			this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Menu = this.mainMenu1;
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		[System.Runtime.InteropServices.DllImport("user32")]
		private static extern IntPtr GetSystemMenu(IntPtr hwnd,bool bRevert);
		[System.Runtime.InteropServices.DllImport("user32")]
		private static extern IntPtr AppendMenu(IntPtr hMenu,int wFlags,IntPtr wIDNewItem,string lpNewItem);
		const int MF_POPUP = 0x0010;
		const int MF_SEPARATOR = 0x0800;
		
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			IntPtr mnuSystem;
			mnuSystem=GetSystemMenu(this.Handle,false);
			AppendMenu(mnuSystem, MF_SEPARATOR, (IntPtr)0, "");
			for(int i= 0;i<this.mainMenu1.MenuItems.Count;i++)
			{
				AppendMenu(mnuSystem,MF_POPUP,this.mainMenu1.MenuItems[i].Handle,this.mainMenu1.MenuItems[i].Text);
			}
		}

		private void menuItem2_Click(object sender, System.EventArgs e)
		{
			Application.Exit();
		}
	}
}