一个简单的基于XML的模块集成框架

1. 准备一个xml文件

xmlmenu

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2.准备一个xml schemal文件来验证xml文件

3。定义一个类来加载菜单

public class MenuLoad
    {
        PRivate PluginCollection m_plugins = null;
        public MenuBar _menbar = new MenuBar();
        public ToolStrip _toolbar = new ToolStrip();
        private OutlookBar bar = new OutlookBar();
        private ImageList imglist = new ImageList();
        private StringBuilder builder = new StringBuilder();
        public MenuLoad()
        {
            bar = _menbar.outlookBar;
        }
        private TabControl tabCtrl;
        public TabControl TabCtrl
        {
            set
            {
                tabCtrl = value;
            }
        }
        private void ValidationEventHandler(object sender, ValidationEventArgs e)
        {
            builder.AppendLine("验证XML文档的时候发生错误：");
            builder.AppendLine("严重级别：" + e.Severity);
            builder.AppendLine("错误信息：" + e.Message);
            builder.AppendLine("------+--------+-------+------+--------+-------+------+--------+-------+");
            builder.AppendLine();
        }
        /**//// 

        /// 验证XML文件是否是合乎规范的文件
        /// 
        /// 文件名称
        /// 是则返回true，否则返回false
        private bool ValidateXml(string xmlfile)
        {
            bool validXml = false;
            string spath = "";
            spath = application.StartupPath + "\\configurations\\XMLSMenu.xsd";
            if(!System.IO.File.Exists(spath))
            {
                throw new System.IO.FileNotFoundException(String.Format(Resources.StringFileNotFound, spath));
            }
            XmlReaderSettings settings = new XmlReaderSettings();
            XmlSchemaSet schemaSet = new XmlSchemaSet();
            schemaSet.Add(null, spath);
            settings.Schemas.Add(schemaSet);
            settings.ValidationType = ValidationType.Schema;
            settings.ValidationEventHandler += new ValidationEventHandler(ValidationEventHandler);
            settings.ValidationFlags = settings.ValidationFlags | XmlSchemaValidationFlags.ReportValidationWarnings;
            XmlReader reader = XmlReader.Create(xmlfile, settings);

            while(reader.Read())
            {
            }
            
            if(builder.Length > 0)
            {
                validXml = false;
            }
            else
            {
                validXml = true;
            }
            reader.Close();
            return validXml;
        }
        /**//// 

        /// 加载菜单
        /// 
        /// 主菜单
        /// 菜单定义文件
        public MainMenu LoadMenus(string xmlfile)
        {
            MainMenu mainmenu = new MainMenu();
            
            try
            {
                using(new WaitCursor())
                {
                    //验证XML是否是合乎规范的XML文件
                    if(ValidateXml(xmlfile))
                    {
                        XmlDocument document = new XmlDocument();
                        document.Load(xmlfile);
                        XmlNode rootNode = document.DocumentElement;
                        mainmenu = GetMenus(rootNode);   
                    }
                    else
                    {
                        throw new Exception(builder.ToString());
                    }
                }
            }
            catch (System.IO.FileNotFoundException)
            {
                Utility.ShowErrorMsg(String.Format(Resources.StringFileNotFound, xmlfile));
            }
            return mainmenu;
        }
        /**//// 

        /// 加载菜单
        /// 
        /// 主菜单
        /// 菜单项节点
        private MainMenu GetMenus(XmlNode node)
        {
            MainMenu mainmenu = new MainMenu();
            List nodelist= new List();
            List mnulist = new List();
            List iplist = new List();
            string menutext ="";
            //首先加载主菜单，避免迭代的时候菜单显示的过分延迟。
            foreach(XmlNode child in node.ChildNodes)
            {
                if(child.NodeType == XmlNodeType.Element && child.Name == "MenuItem")
                {
                    menutext = child.Attributes["Name"].Value;
                    OfficeMenuItem item = new OfficeMenuItem(true,menutext);
                    mainmenu.MenuItems.Add(item);
                    IconPanel cp = new IconPanel();
                    bar.AddBand(menutext, cp);
                    nodelist.Add(child);
                    mnulist.Add(item);
                    iplist.Add(cp);
                }
            }
            //加载所有的子菜单
            GetSubMenus(iplist.ToArray(),mnulist.ToArray(), nodelist.ToArray());
            return mainmenu;
        }
        /**//// 

        /// 加载所有子菜单
        /// 
        /// 主菜单集合
        /// 菜单节点集合
        private void GetSubMenus(IconPanel[] iplist ,OfficeMenuItem[] main, XmlNode[] node)
        {
            EventHandler handler = new EventHandler(OnPluginClick);
            EventHandler handler1 = new EventHandler(OnIconClick);
            EventHandler handler2 = new EventHandler(OnButtonClick);
            string asmname;
            string formtag;
            string text;
            MenuClass mc;
            XmlNode child;
            string iconpath = "";
            string iconname = "";
            string msc = "";
            for(int i = 0; i <= main.GetUpperBound(0); i++)
            {
                //foreach(XmlNode child in node[i].ChildNodes)
                for(int j = 0; j < node[i].ChildNodes.Count;j++ )
                {
                    child = node[i].ChildNodes[j];
                    if(child.NodeType == XmlNodeType.Element && child.Name == "MenuItem")
                    {
                        asmname = child.Attributes["AssemblyName"].Value;
                        formtag = child.Attributes["FormTag"].Value;
                        text = child.Attributes["Name"].Value;
                        msc = child.Attributes["ShortCut"].Value;
                        OfficeMenuItem item = new OfficeMenuItem(true, text, handler);
                        iconname = child.Attributes["Image"].Value;
                        if(iconname != string.Empty)
                        {
                            iconpath = Themes.GetCurrentThemePath() +iconname;
                            item.IconPath = iconpath;
                            
                        } 
                        mc = new MenuClass();
                        mc.Assemblyname = asmname;
                        mc.FormTag = formtag;
                        item.Tag = mc;
                        if(msc != string.Empty)
                        {
                            item.Shortcut = MenuShortCut.GetShortCut(msc);
                        }
                        main[i].MenuItems.Add(item);
                        if((iconpath != string.Empty) && System.IO.File.Exists(iconpath))
                        {    //添加按钮到OutlookBar                        
                            PanelIcon picon = iplist[i].AddIcon(item.Text,Image.FromFile(iconpath),handler1);
                            picon.Tag = mc;
                            //添加按钮到toolbar
                            ToolStripButton button = new ToolStripButton(item.Text, Image.FromFile(iconpath), handler2);
                            button.DisplayStyle = ToolStripItemDisplayStyle.Image;
                            button.ToolTipText = item.Text;
                            button.Tag = mc;
                            button.Visible = true;
                            _toolbar.Items.Add(button);
                        }
                        iconpath = "";
                        mc = null;
                        if(child.ChildNodes.Count > 0)
                        {
                            GetChildMenu(iplist[i],item, child);
                        }
                    }
                }
                //添加分割线
                ToolStripSeparator ss = new ToolStripSeparator();
                _toolbar.Items.Add(ss);
            }
        }
        /**//// 

        /// 加载子菜单
        /// 
        /// 父菜单
        /// 父菜单定义XML节点
        private void GetChildMenu(IconPanel ip,OfficeMenuItem parent, XmlNode node)
        {
            EventHandler handler = new EventHandler(OnPluginClick);
            EventHandler handler1 = new EventHandler(OnIconClick);
            EventHandler handler2 = new EventHandler(OnButtonClick);
            MenuClass mc;
            string asmname;
            string formtag;
            string text;
            XmlNode child1;
            string iconpath = "";
            string iconname = "";
            string msc = "";
            //foreach(XmlNode child1 in node.ChildNodes)
            for(int i = 0; i < node.ChildNodes.Count - 1;i++ )
            {
                child1 = node.ChildNodes[i];
                //检查是否提供了类型
                asmname = child1.Attributes["AssemblyName"].Value;
                formtag = child1.Attributes["FormTag"].Value;
                text = child1.Attributes["Name"].Value;
                OfficeMenuItem childitem;
                childitem = new OfficeMenuItem(true, text, handler);
                childitem.Name = text;
                mc = new MenuClass();
                mc.Assemblyname = asmname;
                mc.FormTag = formtag;
                
                childitem.Tag = mc;
                //添加快捷键
                msc = child1.Attributes["ShortCut"].Value;
                if(msc != string.Empty)
                {
                    childitem.Shortcut = MenuShortCut.GetShortCut(msc);
                }
                //添加图标
                iconname = child1.Attributes["Image"].Value;
                if(iconname != string.Empty)
                {
                    iconpath = Themes.GetCurrentThemePath() + iconname;
                    childitem.IconPath = iconpath;
                }
                parent.MenuItems.Add(childitem);
                if((iconpath != string.Empty) && System.IO.File.Exists(iconpath))
                {    //添加按钮到OutlookBar                        
                    PanelIcon picon = ip.AddIcon(childitem.Text, Image.FromFile(iconpath), handler1);
                    picon.Tag = mc;
                    //添加按钮到toolbar
                    ToolStripButton button = new ToolStripButton(childitem.Text, Image.FromFile(iconpath), handler2);
                    button.DisplayStyle = ToolStripItemDisplayStyle.Image;
                    button.ToolTipText = childitem.Text;
                    button.Tag = mc;
                    button.Visible = true;
                    _toolbar.Items.Add(button);
                }
                iconpath = "";
                mc = null;
                if(child1.ChildNodes.Count > 0)
                {
                    GetChildMenu(ip,childitem, child1);
                }
            }
        }
        /**//// 

        /// 打开一个窗体
        /// 
        /// 窗体类程序集和窗体类的组合，从节点的AssemblyName属性获取
        private  void OpenForm(MenuClass mc)
        {
            string asmname = mc.Assemblyname;
            string formtag = mc.FormTag;
            if (formtag == "")
            {
                throw new Exception(Resources.StringNoFormFlag);
            }
            if(formtag.ToUpper() == "TRUE")
            {
                if(asmname == string.Empty)
                {
                    throw new NullReferenceException(Resources.StringAssemblyNull);
                }

                //string[] a = asmname.Split(',');
                object obj = null;
                Type tp = Type.GetType(asmname);
                if(tp != null)
                {
                    obj = Activator.CreateInstance(tp);
                }
                else
                {
                    throw new Exception("加载程序的时候出错，请检查程序(dll,exe)是否存在或者类型是否正确。");
                }

                //检查是否是Form类
                if((obj == null) | !(obj is Form))
                {
                    throw new Exception(Resources.StringNotForm);
                }
                Form frm = (obj as Form);
                //检查打开的第一个窗口是否是MDIFORM
                if(Application.OpenForms[0].IsMdiContainer)
                {
                    //作为MDICHILDFORM
                    frm.MdiParent = Application.OpenForms[0];
                }
                //加载窗体
                frm.Show();

            }
        }
        /**//// 

        /// 菜单单击事件
        /// 
        /// 
        /// 
        private void OnPluginClick(object sender, EventArgs args)
        {
            OfficeMenuItem item = (OfficeMenuItem)sender;
            MenuClass mc = (MenuClass) item.Tag;
            if ((item.Text == "退出") | (item.Text == "EXIT"))
            {
                OnExitClick(sender, args);
                return;
            }
            OpenForm(mc);
        }
    }

这里面用到了delegate，最重要的函数是加载菜单的函数和OnPluginClick函数。

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使用这个框架可以动态增加任意的层次的模块。

微软的CAB 使用Resigster site方式来增加模块，感觉不是很方便。

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