根据权限动态生成菜单栏和工具栏

第一步：配置XML文件MenuItems.xml

           结点如下所示

<?xml version="1.0" encoding="utf-8" ?>
<Menus>  
  <MenuItem>
    <Text>内部信息维护</Text>
    <ItemID>1</ItemID>
    <ParentItemID>0</ParentItemID>
    <FormName>frmInnerInfo</FormName>
    <IsModule>0</IsModule>
    <Level>1</Level>
    <ImageName>Text1.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>多媒体信息维护</Text>
    <ItemID>2</ItemID>
    <ParentItemID>0</ParentItemID>
    <FormName></FormName>
    <IsModule>1</IsModule>
    <Level>1</Level>
    <ImageName>Video.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>综合信息维护</Text>
    <ItemID>3</ItemID>
    <ParentItemID>0</ParentItemID>
    <FormName>frmCategory</FormName>
    <IsModule>0</IsModule>
    <Level>1</Level>
    <ImageName>Composite.ico</ImageName>
  </MenuItem>  
  <MenuItem>
    <Text>系统管理</Text>
    <ItemID>4</ItemID>
    <ParentItemID>0</ParentItemID>
    <FormName></FormName>
    <IsModule>1</IsModule>
    <Level>1</Level>
    <ImageName>Video.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>用户管理</Text>
    <ItemID>1004</ItemID>
    <ParentItemID>4</ParentItemID>
    <FormName>frmSystemUsers</FormName>
    <IsModule>0</IsModule>
    <Level>1</Level>
    <ImageName>User.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>角色管理</Text>
    <ItemID>1005</ItemID>
    <ParentItemID>4</ParentItemID>
    <FormName>frmSystemRole</FormName>
    <IsModule>0</IsModule>
    <Level>1</Level>
    <ImageName>Role.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>视频管理</Text>
    <ItemID>1006</ItemID>
    <ParentItemID>2</ParentItemID>
    <FormName>frmSystemRole</FormName>
    <IsModule>0</IsModule>
    <Level>2</Level>
    <ImageName>Video.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>图片管理</Text>
    <ItemID>1007</ItemID>
    <ParentItemID>2</ParentItemID>
    <FormName>frmSystemRole</FormName>
    <IsModule>0</IsModule>
    <Level>2</Level>
    <ImageName>Pic.ico</ImageName>
  </MenuItem>
  <MenuItem>
    <Text>文字消息</Text>
    <ItemID>1008</ItemID>
    <ParentItemID>2</ParentItemID>
    <FormName>frmSystemRole</FormName>
    <IsModule>0</IsModule>
    <Level>2</Level>
    <ImageName>Text.ico</ImageName>
  </MenuItem>  
</Menus>

其中Text为菜单或工具栏显示内容，ItemID为结点编号，ParentItemID为父结点编号，FormName结点响应的Form名称，IsModule为是否有子结点（1有0没有）Level结点层级，ImageName对应的图标名称

第二步：设置主窗体为MDI窗体

第三步：代码实现，如下，

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;
using System.Reflection;
using System.Diagnostics;
using System.Threading;

namespace QueryMachine.BackManager
{
    public partial class frmMDIMain : Form
    {
        #region  变量初始化
        private DataSet ds = new DataSet();
        string strRoleFilter = "";

        /// <summary>
        /// <summary>
        /// 确认关闭么？
        /// </summary>
        string resourceClose = "确定要删除么?";

        /// <summary>
        /// 确认提示    `       
        /// </summary>
        string resourceCloseTip = "确认提示";

        /// <summary>
        /// 重新登录
        /// </summary>
        string resourceReLogin = "重新登录";

        /// <summary>
        /// 退出系统
        /// </summary>
        string resourceExit = "退出系统";

        /// <summary>
        /// 已经存在运行的实例
        /// </summary>
        string resourceAlreadyRunning = "已经存在运行的实例！";

        /// <summary>
        /// 系统提示
        /// </summary>
        string resourceSystemTip = "系统提示";

        #endregion

        #region 根据提供的XML动态创建菜单项，以及定义菜单项要触发的事件

        private void CreateToolbar()
        {
            ToolStrip toolStrip = new ToolStrip();
            toolStrip.ImageScalingSize = new System.Drawing.Size(32, 32);
           
            DataView dv = ds.Tables[0].DefaultView;
            //通过DataView来过滤数据首先得到最顶层的菜单
            dv.RowFilter = "ParentItemID=0";

            ///根据权限加载响应的菜单
            if (strRoleFilter != "")
            {
                dv.RowFilter = "ItemID in (" + strRoleFilter + ")";
            }
            for (int i = 0; i < dv.Count; i++)
            {
                ToolStripButton tsButton = new ToolStripButton();

                if (Convert.ToInt16(dv[i]["IsModule"]) == 0)
                {
                    tsButton.Text   = dv[i]["Text"].ToString();
                    tsButton.Name   = dv[i]["ItemID"].ToString();
                    tsButton.Tag    = dv[i]["FormName"].ToString();

                    string strPicPath = "";
                    if (dv[i]["ImageName"].ToString().Length > 0)
                    {
                        string path = System.Windows.Forms.Application.StartupPath + @"http://www.cnblogs.com/../";
                        System.IO.Directory.SetCurrentDirectory(path);
                        strPicPath = System.IO.Directory.GetCurrentDirectory() + @"\ico\" + dv[i]["ImageName"].ToString();
                        
                        if (File.Exists(strPicPath))
                        {
                            tsButton.Image = Image.FromFile(strPicPath);
                        }
                    }

                    
                    
                    tsButton.ToolTipText = dv[i]["Text"].ToString();
                    tsButton.Click += new EventHandler(tsButton_Click);

                    toolStrip.Items.Add(tsButton);
                }
                else
                {
                    ///tsButton.Tag = dv[i]["FormName"].ToString();
                    //tsButton.Click += new EventHandler(subMenu_Click);
                    //以ref的方式将顶层菜单传递参数，因为他可以在赋值后再回传。－－也许还有更好的方法^_^.
                    CreateSubTsb(Convert.ToInt32(dv[i]["ItemID"]), ds.Tables[0], toolStrip);

                }
                

            }

            this.Controls.Add(toolStrip);


        }

        void tsButton_Click(object sender, EventArgs e)
        {
            //tag属性在这里有用到。
            ///ToolStripItem
            string formName = ((ToolStripItem)sender).Tag.ToString();
            CreateFormInstance(formName, Convert.ToInt32(((ToolStripItem)sender).Name));
        }

        private void CreateSubTsb(int ItemID, DataTable dt, ToolStrip toolStrip)
        {
            DataView dv = new DataView(dt);
            //过滤出当前父菜单下在所有子菜单数据(仅为下一层的)
            dv.RowFilter = "ParentItemID=" + ItemID.ToString();

            for (int i = 0; i < dv.Count; i++)
            {
                
                /***********************************************************************/

                ToolStripButton tsButton = new ToolStripButton();

                if (Convert.ToInt16(dv[i]["IsModule"]) == 0)
                {
                    tsButton.Text = dv[i]["Text"].ToString();
                    tsButton.Name = dv[i]["ItemID"].ToString();
                    tsButton.Tag = dv[i]["FormName"].ToString();
                    string strPicPath = "";
                    if (dv[i]["ImageName"].ToString().Length > 0)
                    {
                        string path = System.Windows.Forms.Application.StartupPath + @"http://www.cnblogs.com/../";
                        System.IO.Directory.SetCurrentDirectory(path);
                        strPicPath = System.IO.Directory.GetCurrentDirectory() + @"\ico\" + dv[i]["ImageName"].ToString();

                        if (File.Exists(strPicPath))
                        {
                            tsButton.Image = Image.FromFile(strPicPath);
                        }
                    }
                    
                    tsButton.ToolTipText = dv[i]["Text"].ToString();
                    tsButton.Click += new EventHandler(tsButton_Click);
                    toolStrip.Items.Add(tsButton);
                }
                else
                {
                    ///tsButton.Tag = dv[i]["FormName"].ToString();
                    //tsButton.Click += new EventHandler(subMenu_Click);
                    //以ref的方式将顶层菜单传递参数，因为他可以在赋值后再回传。－－也许还有更好的方法^_^.
                    CreateSubTsb(Convert.ToInt32(dv[i]["ItemID"]), dt, toolStrip);

                }
                
            }
        }       

        #endregion

        #region 动态创建菜单
        private void CreateMenu()
        {        
 
            //定义一个主菜单
            MenuStrip mainMenu = new MenuStrip();       

            DataView dv = ds.Tables[0].DefaultView;
            //通过DataView来过滤数据首先得到最顶层的菜单
            dv.RowFilter = "ParentItemID=0";

            ///根据权限加载相应的菜单
            
            if (strRoleFilter!="")
            {
                dv.RowFilter = "ItemID in (" + strRoleFilter + ")";
            }
            
            for (int i = 0; i < dv.Count; i++)
            {
                //创建一个菜单项
                ToolStripMenuItem topMenu = new ToolStripMenuItem();

                //给菜单赋Text值。也就是在界面上看到的值。

                topMenu.Text = dv[i]["Text"].ToString();
                topMenu.Name = dv[i]["ItemID"].ToString();


                //如果是有下级菜单则通过CreateSubMenu方法来创建下级菜单
                if (Convert.ToInt16(dv[i]["IsModule"]) == 1)
                {
                    //以ref的方式将顶层菜单传递参数，因为他可以在赋值后再回传。－－也许还有更好的方法^_^.
                    CreateSubMenu(ref topMenu, Convert.ToInt32(dv[i]["ItemID"]), ds.Tables[0]);
                }
                else 
                {
                    topMenu.Tag = dv[i]["FormName"].ToString();
                    topMenu.Click += new EventHandler(subMenu_Click);
                }

                //显示应用程序中已打开的 MDI 子窗体列表的菜单项
                mainMenu.MdiWindowListItem = topMenu;
                //将递归附加好的菜单加到菜单根项上。
                mainMenu.Items.Add(topMenu);
            }

            ToolStripMenuItem exitMenu = new ToolStripMenuItem();
            mainMenu.Dock = DockStyle.Top;

            mainMenu.Items.Add(new ToolStripMenuItem(resourceReLogin, null, new EventHandler(ReLogin_Click)));
            mainMenu.Items.Add(new ToolStripMenuItem(resourceExit, null, new EventHandler(ExitSysMenu_Click)));
            //这句很重要。如果不写这句菜单将不会出现在主窗体中。
            this.Controls.Add(mainMenu); 

        }

        /// <summary>
        /// 创建子菜单
        /// </summary>
        /// <param name="topMenu">父菜单项</param>
        /// <param name="ItemID">父菜单的ID</param>
        /// <param name="dt">所有菜单数据集</param>
        private void CreateSubMenu(ref ToolStripMenuItem topMenu, int ItemID, DataTable dt)
        {
            DataView dv = new DataView(dt);
            //过滤出当前父菜单下在所有子菜单数据(仅为下一层的)
            dv.RowFilter = "ParentItemID=" + ItemID.ToString();

            for (int i = 0; i < dv.Count; i++)
            {
                //创建子菜单项
                ToolStripMenuItem subMenu = new ToolStripMenuItem();
                subMenu.Text = dv[i]["Text"].ToString();
                subMenu.Name = dv[i]["ItemID"].ToString();
                //如果还有子菜单则继续递归加载。
                if (Convert.ToInt16(dv[i]["IsModule"]) == 1)
                {
                    //递归调用
                    CreateSubMenu(ref subMenu, Convert.ToInt32(dv[i]["ItemID"]), dt);
                }
                else
                {
                    //扩展属性可以加任何想要的值。这里用formName属性来加载窗体。
                    subMenu.Tag = dv[i]["FormName"].ToString();
                    //给没有子菜单的菜单项加事件。
                    ///subMenu.Click += new EventHandler(subMenu_Click);
                    subMenu.Click += new EventHandler(subMenu_Click);
                }
                string strPicPath = "";
                if (dv[i]["ImageName"].ToString().Length > 0)
                {
                    string path = System.Windows.Forms.Application.StartupPath + @"http://www.cnblogs.com/../";
                    System.IO.Directory.SetCurrentDirectory(path);
                    strPicPath = System.IO.Directory.GetCurrentDirectory() + @"\ico\" + dv[i]["ImageName"].ToString();

                    if (File.Exists(strPicPath))
                    {
                        //设置菜单项前面的图票为16X16的图片文件。
                        Image img = Image.FromFile(strPicPath);
                        subMenu.Image = img;
                        subMenu.Image.Tag = dv[i]["ImageName"].ToString();
                    }
                }

                //将菜单加到顶层菜单下。
                topMenu.DropDownItems.Add(subMenu);
            }
        }

        void subMenu_Click(object sender, EventArgs e)
        {
            //tag属性在这里有用到。
            string formName = ((ToolStripMenuItem)sender).Tag.ToString();
            CreateFormInstance(formName, Convert.ToInt32(((ToolStripMenuItem)sender).Name));

        }
        private void CreateFormInstance(string formName, int id)
        {
            bool flag = false;
            //遍历主窗口上的所有子菜单
            for (int i = 0; i < this.MdiChildren.Length; i++)
            {
                //如果所点的窗口被打开则重新激活
                if (this.MdiChildren[i].Tag.ToString().ToLower() == formName.ToLower())
                {
                    this.MdiChildren[i].Activate();
                    this.MdiChildren[i].Show();
                    this.MdiChildren[i].WindowState = FormWindowState.Normal;
                    flag = true;
                    break;
                }
            }
            if (!flag)
            {
                //如果不存在则用反射创建form窗体实例。
                object frmObj = null;
                
                frmObj = Activator.CreateInstance(Type.GetType("QueryMachine.BackManager." + formName));

                // object frmObj = asm.CreateInstance("Kimbanx.SecurityDiskSystem.FactoryTools." + formName);//程序集+form的类名。
                Form frms = (Form)frmObj;
                //tag属性要重新写一次，否则在第二次的时候取不到。原因还不清楚。有知道的望告知。
                frms.Tag = formName.ToString();
                frms.MdiParent = this;
                frms.Show();
            }
        }
        #endregion

        #region 窗体关闭事件，窗体加载事件，窗体构造函数
        

        public frmMDIMain()
        {
            InitializeComponent();
            ds.ReadXml(System.AppDomain.CurrentDomain.BaseDirectory.ToString() + "MenuItems.xml");

            for (int i = 0; i < UserInfo.lstModule.Count; i++)
            {
                strRoleFilter += (strRoleFilter == "" ? UserInfo.lstModule[i].ToString() : ("," + UserInfo.lstModule[i].ToString()));
            }
        }

        private void frmMDIMain_Load(object sender, EventArgs e)
        {
            CreateToolbar();
            CreateMenu();
        }

        private void ExitSysMenu_Click(object sender, EventArgs e)
        {
            this.Close();
            
        }

        private void ReLogin_Click(object sender, EventArgs e)
        {
            
            Process process = new Process();
            process.StartInfo.FileName = System.AppDomain.CurrentDomain.BaseDirectory.ToString()+"QueryMachine.exe";
            process.Start();
            Application.Exit();
            bool flag = false;
            Mutex mutex = new Mutex(true, "QueryMachine.BackManager.frmLogin", out flag);
            if (flag)
            {
                frmLogin Login = new frmLogin();
                
                if (Login.ShowDialog() == DialogResult.OK)
                {
                    Application.Run(new frmMDIMain());
                }
            }
            else
            {
                MessageBox.Show(resourceAlreadyRunning,resourceSystemTip, MessageBoxButtons.OK, MessageBoxIcon.Information);
                Application.Exit();
            }
        }

        #endregion     

        private void frmMDIMain_FormClosing(object sender, FormClosingEventArgs e)
        {

            if (e.CloseReason != CloseReason.ApplicationExitCall)
            {
                DialogResult re = MessageBox.Show(resourceClose,resourceCloseTip, MessageBoxButtons.YesNo, MessageBoxIcon.Information);
                if (re == DialogResult.Yes)
                {
                    e.Cancel = false;

                    Application.Exit();
                }
                else
                {
                    e.Cancel = true;
                }
            } 

        }

    }
}