winform 菜单项显示历史记录

（1）创建一个项目，将其命名为MenuHistory，默认窗体为Form1。

（2）从工具箱中向Form1窗体添加MenuStrip控件，同时向窗体添加OpenFileDialog控件。创建一个“文件”主菜单，在其下面创建打开、关闭所有、退出等菜单选项。

（3）代码如下：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

namespace HistoryRecord

{

public partial class Form1 : Form

{

//string address;

public Form1()

{

InitializeComponent();

//address = System.Environment.CurrentDirectory;

}

//相对路径

string address = System.Environment.CurrentDirectory;

//将打开的路径写入到INI文件

private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)

{

openFileDialog1.FileName = "";

this.openFileDialog1.ShowDialog();

StreamWriter s = new StreamWriter(address + "\\Menu.ini", true);//true:

s.WriteLine(openFileDialog1.FileName);//写入INI文件

s.Flush();//清空缓存数据，并将缓存数据写入基础流

s.Close();

}

//读取INI文件，并将信息加入菜单

private void Form1_Load(object sender, EventArgs e)

{

StreamReader sr = new StreamReader(address + "\\Menu.ini");

int i = this.文件ToolStripMenuItem.DropDownItems.Count - 2;

while (sr.Peek() >= 0)

{

ToolStripMenuItem menuitem = new ToolStripMenuItem(sr.ReadLine());

this.文件ToolStripMenuItem.DropDownItems.Insert(i, menuitem);

i++;

menuitem.Click += new EventHandler(menuitem_Click);

}

sr.Close();

}

private void menuitem_Click(object sender, EventArgs e)

{

ToolStripMenuItem menu = (ToolStripMenuItem)sender;

ShowWindows(menu.Text);

}

//自定义方法ShowWindows()用来加载背景图片并显示窗体

public void ShowWindows(string fileName)

{

Image p = Image.FromFile(fileName);

Form f = new Form();

f.MdiParent = this;

f.BackgroundImage = p;

f.Show();

}

private void 关闭所有ToolStripMenuItem_Click(object sender, EventArgs e)

{

//用遍历获取所有子窗体

foreach (Form frm in this.MdiChildren)

{

frm.Close(); //关闭子窗体

}

}

private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)

{

Application.Exit();

}

}

}

扩展：

1：菜单项打开隐藏按钮，菜单不关闭

//菜单点击打开隐藏时不关闭

this.文件ToolStripMenuItem.ShowDropDown();

2：文件夹选项，A事件调用B事件

//调用菜单下的选项点击事件

this.文件ToolStripMenuItem.DropDownItems[3].PerformClick();