动态创建菜单，menustrip，根据权限显示菜单，控制菜单可用，反射，给窗体传值，反射对象传值，public static Object CreateInstance ( Type type, params Object[] args )

文章來源: http://www.cnblogs.com/virusswb/archive/2008/07/03/1234889.html

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.Reflection;
using Kimbanx.SecurityDiskSystem.FactoryTools.MenuItem;
using Program.BLL;
using Kimbanx.SecurityDiskSystem.FactoryTools.DBDAL;
using Program.Model;
using System.Threading;
using System.Diagnostics;

namespace Kimbanx.SecurityDiskSystem.FactoryTools
{
    public partial class frmMDIMain : Form
    {
        private List<int> loginUserAuthIDList;
        public frmMDIMain()
        {
            InitializeComponent();

        }

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

        private void checkDisk_Click(object sender, EventArgs e)
        {
            CheckDiskForm checkDiskForm = new CheckDiskForm();
            checkDiskForm.ShowDialog();
        }

        private void reInStockDisk_Click(object sender, EventArgs e)
        {
            ReInStockDisk reInStockDisk = new ReInStockDisk();
            reInStockDisk.ShowDialog();
        }

        private void createConfigMenu_Click(object sender, EventArgs e)
        {
            CreatePolicyConfig createCfg = new CreatePolicyConfig(ConfigFormState.Create, "创建策略配置");
            createCfg.ShowDialog();
        }

        private void ProduceDiskMenu_Click(object sender, EventArgs e)
        {
            ProduceDisk produceDisk = new ProduceDisk();
            produceDisk.ShowDialog();
        }

        private void resetDisk_Click(object sender, EventArgs e)
        {
            ResetDiks resetDisk = new ResetDiks();
            resetDisk.ShowDialog();
        }

        private void ResetPersonalDisk_Click(object sender, EventArgs e)
        {
            ResetPersonalDisk resetPersonalDisk = new ResetPersonalDisk();
            resetPersonalDisk.ShowDialog();
        }

        private void ImportNewCfg_Click(object sender, EventArgs e)
        {
            ImportNewCfg importCfg = new ImportNewCfg();
            importCfg.ShowDialog();
        }

        private void UpdateDiskTools_Click(object sender, EventArgs e)
        {
            UpdateDiskSoft updateDisk = new UpdateDiskSoft();
            updateDisk.ShowDialog();
        }

        private void viewDiskInfoMenu_Click(object sender, EventArgs e)
        {
            ShowDiskInfo showDiskInfo = new ShowDiskInfo();
            showDiskInfo.ShowDialog();
        }

        private void selectConfigMenu_Click(object sender, EventArgs e)
        {
            CreatePolicyConfig viewCfg = new CreatePolicyConfig(ConfigFormState.View, "查看策略配置");
            viewCfg.ShowDialog();
        }

        private void importConfigMenu_Click(object sender, EventArgs e)
        {
            CreatePolicyConfig importCfg = new CreatePolicyConfig(ConfigFormState.Import, "迁入策略配置");
            importCfg.ShowDialog();
        }

        private void exCfgMenu_Click(object sender, EventArgs e)
        {
            CreatePolicyConfig exCfg = new CreatePolicyConfig(ConfigFormState.Export, "迁出策略配置");
            exCfg.ShowDialog();
        }

        private void exManCenterCfgMenu_Click(object sender, EventArgs e)
        {
            CreatePolicyConfig exManCenter = new CreatePolicyConfig(ConfigFormState.ExportManagementCenter, "导出管控中心策略配置(企业版)");
            exManCenter.ShowDialog();
        }

        private void ManRoleMenu_Click(object sender, EventArgs e)
        {
            ManageRoleForm manageRoleForm = new ManageRoleForm();
            manageRoleForm.ShowDialog();
        }

        private void ManageUserMenu_Click(object sender, EventArgs e)
        {
            ManSysUserForm1 manSysUserForm = new ManSysUserForm1();
            manSysUserForm.ShowDialog();
        }

        private void SysParaMenu_Click(object sender, EventArgs e)
        {
            SysParaForm sysParaForm = new SysParaForm();
            sysParaForm.ShowDialog();
        }

        private void SysLogMenu_Click(object sender, EventArgs e)
        {
            SelectSysLogForm1 selectSysLogForm = new SelectSysLogForm1();
            selectSysLogForm.ShowDialog();
        }

        private void ModifyPwdMenu_Click(object sender, EventArgs e)
        {
            ModifyUserPwdForm1 modifyUserPasswordForm = new ModifyUserPwdForm1();
            modifyUserPasswordForm.ShowDialog();
        }

        private void frmMDIMain_Load(object sender, EventArgs e)
        {
            loginUserAuthIDList = new List<int>();
            BLLUserInRole bllUserInRole = new BLLUserInRole();
            DataTable roleDT = bllUserInRole.GetRoleDataTableByUserID(Helper.Helper.Log.Opeid);
            List<int> roleIDList = new List<int>();
            foreach (DataRow row in roleDT.Rows)
            {
                roleIDList.Add(Convert.ToInt32(row["RoleInfoAutoID"].ToString()));
            }
            loginUserAuthIDList = MenuItemDAL.GetAllMenuList(roleIDList);
            CreateMenu(MenuItem.MenuItem.MenuContent);

            this.menuStrip1.Items.Add(new ToolStripMenuItem("重新登录", null, new EventHandler(reload_Click)));
            this.menuStrip1.Items.Add(new ToolStripMenuItem("退出系统",null,new EventHandler(ExitSysMenu_Click)));
            foreach (ToolStripMenuItem item in menuStrip1.Items)
            {
                if (item.DropDownItems.Count > 0)
                {
                    showMenu(item);
                }

            }
        }
        private void reload_Click(object sender, EventArgs e)
        {
            //Process process = new Process();
            //process.StartInfo.FileName = "Kimbanx.SecurityDiskSystem.FactoryTools.exe";
            //process.Start();
            //Application.Exit();
            //bool flag = false;
            //Mutex mutex = new Mutex(true, "Kimbanx.SecurityDiskSystem.FactoryTools.LoginForm", out flag);
            //if (flag)
            //{
            //    LoginForm loginForm = new LoginForm();
            //    if (loginForm.ShowDialog() == DialogResult.OK)
            //    {
            //        Application.Run(new frmMDIMain());
            //    }
            //}
            //else
            //{
            //    MessageBox.Show("已经存在运行的实例！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            //    Application.Exit();
            //}
        }
        private void showMenu(ToolStripMenuItem item)
        {

            for (int i = 0; i < item.DropDownItems.Count; i++)
            {
                if (((ToolStripMenuItem) item.DropDownItems[i]).DropDownItems.Count> 0)
                {
                    showMenu((ToolStripMenuItem)item.DropDownItems[i]);
                }
                else
                {
                    if (loginUserAuthIDList.Contains(Convert.ToInt32(item.DropDownItems[i].Name)))
                    {
                        item.DropDownItems[i].Enabled = true;
                    }
                    else
                    { item.DropDownItems[i].Enabled = false; }
                }
            }

        }
        /**//**/
        /**//// <summary>
        /// 动态创建菜单
        /// </summary>
        private void CreateMenu(string menuContent)
        {
            //定义一个主菜单
            MenuStrip mainMenu = new MenuStrip();
            DataSet ds = new DataSet();
            //从XML中读取数据。数据结构后面详细讲一下。
            //StreamReader sr = new StreamReader(menuContent);
            //ds.ReadXml(sr);
            ds.ReadXml(Path.Combine(Application.StartupPath, "..\\..\\MenuItem\\MenuItem.xml"));
            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";
            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]);
                }
                //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;
            //将窗体的MainMenuStrip梆定为mainMenu.
            this.menuStrip1 = mainMenu;
            //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);
                }
                //if (dv[i]["ImageName"].ToString().Length > 0)
                //{
                //    //设置菜单项前面的图票为16X16的图片文件。
                //    Image img = Image.FromFile(@"..\..\Image\" + dv[i]["ImageName"].ToString());
                //    subMenu.Image = img;
                //    subMenu.Image.Tag = dv[i]["ImageName"].ToString();
                //}
                //将菜单加到顶层菜单下。
                topMenu.DropDownItems.Add(subMenu);
            }
        }

        /**//**/
        /**//// <summary>
        /// 菜单单击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        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));
        }

        /**//**/
        /**//// <summary>
        /// 创建form实例。
        /// </summary>
        /// <param name="formName">form的类名</param>
        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。
                Assembly asm = Assembly.Load("Kimbanx.SecurityDiskSystem.FactoryTools");//程序集名
                object frmObj=null;
                switch(id)
                {
                    case 48:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName), new object[] { ConfigFormState.Create, "创建策略配置" });
                        break;
                    case 49:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName), new object[] { ConfigFormState.View, "查看策略配置" });

                        break;
                    case 50:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName), new object[] { ConfigFormState.Import, "迁入策略配置" });

                        break;
                    case 51:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName), new object[] { ConfigFormState.Export, "迁出策略配置" });

                        break;
                    case 52:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName), new object[] { ConfigFormState.ExportManagementCenter, "导出管控中心用策略配置(企业版)" });

                        break;
                    default:
                         frmObj = Activator.CreateInstance(Type.GetType("Kimbanx.SecurityDiskSystem.FactoryTools." + formName));
                        break;
                }

               // 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();
            }
        }

    }
}

菜单的xml文件如下所示：这个是我从别人的博客中摘抄的。

<?xml version="1.0" encoding="utf-8" ?>

<Menus>

</MenuItem>

</MenuItem>

<FormName>frmInputBooks</FormName>

<ImageName>crest16x16.gif</ImageName>

</MenuItem>

</MenuItem>

</MenuItem>

</MenuItem>

<Text>买sss管理</Text>

<FormName>frmBuyBook</FormName>

</MenuItem>

<Text>dsafasdf</Text>

<FormName>frmBuyBook</FormName>

</MenuItem>

</Menus>
下面来说明一下XML文件。
Text：为显示在窗体上的文字，
ItemID：为菜单的ID，
ParentItemID：为此菜单的父菜单ID如果是顶级菜单则为0
FormName：为单击菜单所要显示的窗体类名如果是还有下级菜单的则不要写。
IsModule：是否还有子菜单1有，0没有
Level：菜单所在的层数。目前还没用到。
ImageName：菜单前的图标为16x16的图片文件，这个我这里没有用到

在这里还可以根据自己的需要加其它的属性，也可以写成以数据库的方式。
这是我目前用到的功能。我会继续发表我做这个小软件的心得体会。希望对大家有所帮助。

【Blog】http://virusswb.cnblogs.com/

【MSN】jorden008@hotmail.com

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