C#.NET经典实例-带历史信息的菜单

1         public void ShowWindows(string fileName)
2         {
3             Image img = Image.FromFile(fileName);
4             Form f = new Form();
5             f.MdiParent = this;
6             f.BackgroundImage = img;
7             f.Show();
8         }

 1         private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
 2         {
 3             // 打开文件选择窗口
 4             openFileDialog1.FileName = "";
 5             this.openFileDialog1.ShowDialog();
 6             // 写入INI文件
 7             StreamWriter s = new StreamWriter(address + "\\Menu.ini", true);
 8             s.WriteLine(openFileDialog1.FileName);
 9             s.Flush();
10             s.Close();
11             // 调用方法显示文件(图片)
12             ShowWindows(openFileDialog1.FileName);
13         }

 1         private void 文件菜单ToolStripMenuItem_Click(object sender, EventArgs e)
 2         {
 3 
 4             // 读取INI文件信息
 5             StreamReader sr = new StreamReader(address + "\\Menu.ini");
 6             int i = this.文件菜单ToolStripMenuItem.DropDownItems.Count - 2;
 7             while (sr.Peek() >= 0)
 8             {
 9                 ToolStripMenuItem menuitem = new ToolStripMenuItem(sr.ReadLine());
10                 this.文件菜单ToolStripMenuItem.DropDownItems.Insert(i, menuitem);
11                 i++;
12                 menuitem.Click += new EventHandler(menuitem_Click);
13             }
14             sr.Close();
15         }

  1 using System;
  2 using System.Drawing;
  3 using System.IO;
  4 using System.Windows.Forms;
  5 
  6 namespace EX01_001
  7 {
  8     /// <summary>
  9     /// 带历史信息的文件菜单（INI文件）
 10     /// </summary>
 11     public partial class Form1 : Form
 12     {
 13         public Form1()
 14         {
 15             InitializeComponent();
 16         }
 17 
 18         /// <summary>
 19         /// 用来记录当前的路径
 20         /// </summary>
 21         string address = System.Environment.CurrentDirectory;
 22 
 23         private void Form1_Load(object sender, EventArgs e)
 24         {
 25 
 26         }
 27 
 28         /// <summary>
 29         /// 打开文件
 30         /// </summary>
 31         /// <param name="sender"></param>
 32         /// <param name="e"></param>
 33         private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
 34         {
 35             // 打开文件选择窗口
 36             openFileDialog1.FileName = "";
 37             this.openFileDialog1.ShowDialog();
 38             // 写入INI文件
 39             StreamWriter s = new StreamWriter(address + "\\Menu.ini", true);
 40             s.WriteLine(openFileDialog1.FileName);
 41             s.Flush();
 42             s.Close();
 43             // 调用方法显示文件(图片)
 44             ShowWindows(openFileDialog1.FileName);
 45         }
 46 
 47         /// <summary>
 48         /// 文件显示窗口
 49         /// </summary>
 50         /// <param name="fileName"></param>
 51         public void ShowWindows(string fileName)
 52         {
 53             Image img = Image.FromFile(fileName);
 54             Form f = new Form();
 55             f.MdiParent = this;
 56             f.BackgroundImage = img;
 57             f.Show();
 58         }
 59 
 60         /// <summary>
 61         /// 点击菜单时读取INI文件并将信息加入文件菜单
 62         /// </summary>
 63         /// <param name="sender"></param>
 64         /// <param name="e"></param>
 65         private void 文件菜单ToolStripMenuItem_Click(object sender, EventArgs e)
 66         {
 67             // 清除之前的历史信息
 68             if (文件菜单ToolStripMenuItem.DropDownItems.Count > 3)
 69             {
 70                 int j = 1;
 71                 while (文件菜单ToolStripMenuItem.DropDownItems.Count > 3)
 72                 {
 73                     文件菜单ToolStripMenuItem.DropDownItems.RemoveAt(j);
 74                 }
 75             }
 76             // 读取INI文件信息
 77             StreamReader sr = new StreamReader(address + "\\Menu.ini");
 78             int i = this.文件菜单ToolStripMenuItem.DropDownItems.Count - 2;
 79             while (sr.Peek() >= 0)
 80             {
 81                 ToolStripMenuItem menuitem = new ToolStripMenuItem(sr.ReadLine());
 82                 this.文件菜单ToolStripMenuItem.DropDownItems.Insert(i, menuitem);
 83                 i++;
 84                 menuitem.Click += new EventHandler(menuitem_Click);
 85             }
 86             sr.Close();
 87         }
 88 
 89         /// <summary>
 90         /// 菜单选项点击
 91         /// </summary>
 92         /// <param name="sender"></param>
 93         /// <param name="e"></param>
 94         private void menuitem_Click(object sender, EventArgs e)
 95         {
 96             ToolStripMenuItem Mymeun = (ToolStripMenuItem)sender;
 97             ShowWindows(Mymeun.Text);
 98         }
 99     }
100 }