C#实现从dll程序集中动态加载窗体
2015-04-29 11:23
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昨天晚上花了一晚上时间写了一个从程序集中动态加载窗体的程序.将任何包含窗体的代码编译成 dll 文件,再把 dll 文件拷贝到本程序的目录下,本程序运行时即可动态检查到 dll 文件中的窗体,将窗体类的类型在程序菜单中显示出来,点击菜单即可运行对应的窗体.
本程序主要用到了 Assembly 类动态加载程序集,再得到程序集中包含类的 Type 类型,动态生成类实例,动态调用类方法.个人觉得这是一种提供高度松耦合,可随意扩展的程序结构框架,希望和大家探讨一下这种框架的应用前景!
关键性代码如下:
程序截图:
单个 dll 文件包含一个窗体时:
当程序目录下的所有程序集中包含一个窗体类时,程序运行界面:
多个 dll 文件包含多个窗体时:
当程序目录下的所有程序集中包含多个窗体类时,程序运行界面:
程序源码下载:http://files.cnblogs.com/Infinity/WindowsForm.rar
本程序主要用到了 Assembly 类动态加载程序集,再得到程序集中包含类的 Type 类型,动态生成类实例,动态调用类方法.个人觉得这是一种提供高度松耦合,可随意扩展的程序结构框架,希望和大家探讨一下这种框架的应用前景!
关键性代码如下:
using System; using System.Drawing; using System.IO; using System.Reflection; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace WindowsFormTest { /**//// <summary> /// Form1 的摘要说明。 /// </summary> public class FrmMain : System.Windows.Forms.Form { private int formNum; private ArrayList formTypes = new ArrayList(); private ArrayList formObjects = new ArrayList(); private System.Windows.Forms.MainMenu mnuMain; private System.Windows.Forms.MenuItem mnuItmRun; private System.Windows.Forms.MenuItem mnuItemWindow; private System.Windows.Forms.MenuItem mnuItmHelp; private System.Windows.Forms.MenuItem mnuItmCascade; private System.Windows.Forms.MenuItem mnuItmTileHorizontal; private System.Windows.Forms.MenuItem mnuItmTileVertical; private System.Windows.Forms.MenuItem menuItem1; private System.Windows.Forms.MenuItem mnuItmAbout; private System.Windows.Forms.StatusBar staBarMain; private System.Windows.Forms.StatusBarPanel pnlInfo; private System.Windows.Forms.StatusBarPanel pnlNum; /**//// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; public FrmMain() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /**//// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码 /**//// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.mnuMain = new System.Windows.Forms.MainMenu(); this.mnuItmRun = new System.Windows.Forms.MenuItem(); this.mnuItemWindow = new System.Windows.Forms.MenuItem(); this.mnuItmCascade = new System.Windows.Forms.MenuItem(); this.mnuItmTileHorizontal = new System.Windows.Forms.MenuItem(); this.mnuItmTileVertical = new System.Windows.Forms.MenuItem(); this.menuItem1 = new System.Windows.Forms.MenuItem(); this.mnuItmHelp = new System.Windows.Forms.MenuItem(); this.mnuItmAbout = new System.Windows.Forms.MenuItem(); this.staBarMain = new System.Windows.Forms.StatusBar(); this.pnlInfo = new System.Windows.Forms.StatusBarPanel(); this.pnlNum = new System.Windows.Forms.StatusBarPanel(); ((System.ComponentModel.ISupportInitialize)(this.pnlInfo)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.pnlNum)).BeginInit(); this.SuspendLayout(); // // mnuMain // this.mnuMain.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { this.mnuItmRun, this.mnuItemWindow, this.mnuItmHelp}); // // mnuItmRun // this.mnuItmRun.Index = 0; this.mnuItmRun.Text = "运行窗体(&R)"; // // mnuItemWindow // this.mnuItemWindow.Index = 1; this.mnuItemWindow.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { this.mnuItmCascade, this.mnuItmTileHorizontal, this.mnuItmTileVertical, this.menuItem1}); this.mnuItemWindow.Text = "窗口(&W)"; // // mnuItmCascade // this.mnuItmCascade.Index = 0; this.mnuItmCascade.Text = "层叠窗口"; this.mnuItmCascade.Click += new System.EventHandler(this.mnuItmCascade_Click); // // mnuItmTileHorizontal // this.mnuItmTileHorizontal.Index = 1; this.mnuItmTileHorizontal.Text = "横向平铺窗口"; this.mnuItmTileHorizontal.Click += new System.EventHandler(this.mnuItmTileHorizontal_Click); // // mnuItmTileVertical // this.mnuItmTileVertical.Index = 2; this.mnuItmTileVertical.Text = "纵向平铺窗口"; this.mnuItmTileVertical.Click += new System.EventHandler(this.mnuItmTileVertical_Click); // // menuItem1 // this.menuItem1.Index = 3; this.menuItem1.Text = "-"; // // mnuItmHelp // this.mnuItmHelp.Index = 2; this.mnuItmHelp.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { this.mnuItmAbout}); this.mnuItmHelp.Text = "帮助(&H)"; // // mnuItmAbout // this.mnuItmAbout.Index = 0; this.mnuItmAbout.Shortcut = System.Windows.Forms.Shortcut.F1; this.mnuItmAbout.Text = "关于(&A)"; this.mnuItmAbout.Click += new System.EventHandler(this.mnuItmAbout_Click); // // staBarMain // this.staBarMain.Location = new System.Drawing.Point(0, 343); this.staBarMain.Name = "staBarMain"; this.staBarMain.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] { this.pnlInfo, this.pnlNum}); this.staBarMain.ShowPanels = true; this.staBarMain.Size = new System.Drawing.Size(584, 22); this.staBarMain.TabIndex = 1; // // pnlInfo // this.pnlInfo.Width = 300; // // pnlNum // this.pnlNum.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Spring; this.pnlNum.Width = 268; // // FrmMain // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(584, 365); this.Controls.Add(this.staBarMain); this.IsMdiContainer = true; this.Menu = this.mnuMain; this.Name = "FrmMain"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "动态加载窗体"; this.Load += new System.EventHandler(this.FrmMain_Load); ((System.ComponentModel.ISupportInitialize)(this.pnlInfo)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.pnlNum)).EndInit(); this.ResumeLayout(false); } #endregion private void FrmMain_Load(object sender, System.EventArgs e) { Assembly assembly = null; string windowsPath = Path.Combine(Application.StartupPath, "Windows"); foreach (string dllFile in Directory.GetFiles(windowsPath, "*.dll")) { assembly = Assembly.LoadFile(dllFile); Type[] types = assembly.GetTypes(); foreach (Type t in types) { if (t.BaseType == typeof(Form)) { this.formTypes.Add(t); MenuItem item = this.mnuItmRun.MenuItems.Add(t.FullName); item.Click += new EventHandler(menuItemNewItem_Click); } } } } private void menuItemNewItem_Click(object sender, EventArgs e) { MenuItem item = (MenuItem)sender; Type t = (Type)(this.formTypes[item.Index]); Object obj = Activator.CreateInstance(t); this.formObjects.Add(obj); formNum += 1; t.InvokeMember("MdiParent", BindingFlags.SetProperty, null, obj, new object[] {this}); t.InvokeMember("Text", BindingFlags.SetProperty, null, obj, new object[] {t.FullName+" 窗体:"+formNum}); t.InvokeMember ("Show", BindingFlags.InvokeMethod, null, obj, new object [] {}); ((Form)obj).Closing += new CancelEventHandler(FrmWindow_Closing); ((Form)obj).Activated += new EventHandler(FrmWindow_Activated); MenuItem menuItem = this.mnuItemWindow.MenuItems.Add(((Form)obj).Text); menuItem.Click += new EventHandler(menuItemWindow_Click); this.pnlNum.Text = "当前装载了"+this.formObjects.Count+"个窗体"; this.pnlInfo.Text = "当前活动窗体:"+this.ActiveMdiChild.Text; } private void menuItemWindow_Click(object sender, System.EventArgs e) { MenuItem item = (MenuItem)sender; ((Form)(this.formObjects[item.Index-4])).Activate(); this.pnlNum.Text = "当前装载了"+this.formObjects.Count+"个窗体"; this.pnlInfo.Text = "当前活动窗体:"+this.ActiveMdiChild.Text; } private void FrmWindow_Activated(object sender, System.EventArgs e) { this.pnlNum.Text = "当前装载了"+this.formObjects.Count+"个窗体"; this.pnlInfo.Text = "当前活动窗体:"+this.ActiveMdiChild.Text; } private void FrmWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e) { for (int i=0; i<this.formObjects.Count; i++) { if (((Form)this.formObjects[i]).Text == ((Form)sender).Text) { this.formObjects.RemoveAt(i); this.mnuItemWindow.MenuItems.RemoveAt(i+4); this.pnlNum.Text = "当前装载了"+this.formObjects.Count+"个窗体"; this.pnlInfo.Text = "当前活动窗体:"+this.ActiveMdiChild.Text; break; } } } private void mnuItmCascade_Click(object sender, System.EventArgs e) { this.LayoutMdi(MdiLayout.Cascade); } private void mnuItmTileHorizontal_Click(object sender, System.EventArgs e) { this.LayoutMdi(MdiLayout.TileHorizontal); } private void mnuItmTileVertical_Click(object sender, System.EventArgs e) { this.LayoutMdi(MdiLayout.TileVertical); } private void mnuItmAbout_Click(object sender, System.EventArgs e) { new FrmAbout().ShowDialog(this); } } }
程序截图:
单个 dll 文件包含一个窗体时:
当程序目录下的所有程序集中包含一个窗体类时,程序运行界面:
多个 dll 文件包含多个窗体时:
当程序目录下的所有程序集中包含多个窗体类时,程序运行界面:
程序源码下载:http://files.cnblogs.com/Infinity/WindowsForm.rar
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