using   System;  
  using   System.IO;  
  using   System.Text;  
  using   System.Drawing;  
  using   System.Collections;  
  using   System.ComponentModel;  
  using   System.Windows.Forms;  
   
  namespace   NotePad  
  {  
  ///   <summary>  
  ///   Summary   description   for   NotePad.  
  ///   </summary>  
  public   class   NotePad   :   Form  
  {  
  private   TextBox   textBox;  
  private   MenuItem   menuFile;  
  private   MenuItem   menuHelp;  
  private   MenuItem   menuFile_Open;  
  private   MenuItem   menuFile_SaveAs;  
  private   MenuItem   menuFile_Exit;  
  private   MenuItem   menuHelp_About;  
  private   MenuItem   menuFile_Line1;  
  private   OpenFileDialog   openFileDialog;  
  private   SaveFileDialog   saveFileDialog;  
  private   MainMenu   mainMenu;  
  private   System.ComponentModel.IContainer   components;  
  private   MenuItem   menuFile_Save;  
  private   MenuItem   menuEdit;  
  private   MenuItem   menuEdit_Undo;  
  private   MenuItem   menuEdit_Redo;  
  private   MenuItem   menuEdit_Line1;  
  private   MenuItem   menuEdit_Cut;  
  private   MenuItem   menuEdit_Copy;  
  private   MenuItem   menuEdit_Paste;  
  private   MenuItem   menuEdit_Del;  
  private   MenuItem   menuFile_New;  
  private   System.Windows.Forms.StatusBar   statusBar;  
   
  public   string   oldFileName   =   ""; //初始打开文件的路径及名称（为空）。  
   
  public   NotePad()  
  {  
  //  
  //   Required   for   Windows   Form   Designer   support  
  //  
  InitializeComponent();  
   
  //  
  //   TODO:   Add   any   constructor   code   after   InitializeComponent   call  
  //  
  }  
   
  ///   <summary>  
  ///   Clean   up   any   resources   being   used.  
  ///   </summary>  
  protected   override   void   Dispose(   bool   disposing   )  
  {  
  if(   disposing   )  
  {  
  if   (components   !=   null)    
  {  
  components.Dispose();  
  }  
  }  
  base.Dispose(   disposing   );  
  }  
   
  #region   Windows   Form   Designer   generated   code  
  ///   <summary>  
  ///   Required   method   for   Designer   support   -   do   not   modify  
  ///   the   contents   of   this   method   with   the   code   editor.  
  ///   </summary>  
  private   void   InitializeComponent()  
  {  
  System.Resources.ResourceManager   resources   =   new   System.Resources.ResourceManager(typeof(NotePad));  
  this.textBox   =   new   System.Windows.Forms.TextBox();  
  this.mainMenu   =   new   System.Windows.Forms.MainMenu();  
  this.menuFile   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_New   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_Open   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_Save   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_SaveAs   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_Line1   =   new   System.Windows.Forms.MenuItem();  
  this.menuFile_Exit   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Undo   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Redo   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Cut   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Copy   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Paste   =   new   System.Windows.Forms.MenuItem();  
  this.menuEdit_Del   =   new   System.Windows.Forms.MenuItem();  
  this.menuHelp   =   new   System.Windows.Forms.MenuItem();  
  this.menuHelp_About   =   new   System.Windows.Forms.MenuItem();  
  this.openFileDialog   =   new   System.Windows.Forms.OpenFileDialog();  
  this.saveFileDialog   =   new   System.Windows.Forms.SaveFileDialog();  
  this.menuEdit_Line1   =   new   System.Windows.Forms.MenuItem();  
  this.statusBar   =   new   System.Windows.Forms.StatusBar();  
  this.SuspendLayout();  
  //    
  //   textBox  
  //    
  this.textBox.Dock   =   System.Windows.Forms.DockStyle.Fill;  
  this.textBox.Font   =   new   System.Drawing.Font("NSimSun",   9F,   System.Drawing.FontStyle.Regular,   System.Drawing.GraphicsUnit.Point,   ((System.Byte)(0)));  
  this.textBox.MaxLength   =   1048576;  
  this.textBox.Multiline   =   true;  
  this.textBox.Name   =   "textBox";  
  this.textBox.ScrollBars   =   System.Windows.Forms.ScrollBars.Both;  
  this.textBox.Size   =   new   System.Drawing.Size(632,   430);  
  this.textBox.TabIndex   =   0;  
  this.textBox.Text   =   "";  
  this.textBox.TextChanged   +=   new   System.EventHandler(this.textBox_TextChanged);  
  //    
  //   mainMenu  
  //    
  this.mainMenu.MenuItems.AddRange(new   System.Windows.Forms.MenuItem[]   {  
    this.menuFile,  
    this.menuEdit,  
    this.menuHelp});  
  //    
  //   menuFile  
  //    
  this.menuFile.Index   =   0;  
  this.menuFile.MenuItems.AddRange(new   System.Windows.Forms.MenuItem[]   {  
    this.menuFile_New,  
    this.menuFile_Open,  
    this.menuFile_Save,  
    this.menuFile_SaveAs,  
    this.menuFile_Line1,  
    this.menuFile_Exit});  
  this.menuFile.Text   =   "文件";  
  //    
  //   menuFile_New  
  //    
  this.menuFile_New.Index   =   0;  
  this.menuFile_New.Shortcut   =   System.Windows.Forms.Shortcut.CtrlN;  
  this.menuFile_New.Text   =   "新建";  
  this.menuFile_New.Click   +=   new   System.EventHandler(this.menuFile_New_Click);  
  //    
  //   menuFile_Open  
  //    
  this.menuFile_Open.Index   =   1;  
  this.menuFile_Open.Shortcut   =   System.Windows.Forms.Shortcut.CtrlO;  
  this.menuFile_Open.Text   =   "打开";  
  this.menuFile_Open.Click   +=   new   System.EventHandler(this.menuFile_Open_Click);  
  //    
  //   menuFile_Save  
  //    
  this.menuFile_Save.Index   =   2;  
  this.menuFile_Save.Shortcut   =   System.Windows.Forms.Shortcut.CtrlS;  
  this.menuFile_Save.Text   =   "保存";  
  this.menuFile_Save.Click   +=   new   System.EventHandler(this.menuFile_Save_Click);  
  //    
  //   menuFile_SaveAs  
  //    
  this.menuFile_SaveAs.Index   =   3;  
  this.menuFile_SaveAs.Shortcut   =   System.Windows.Forms.Shortcut.CtrlShiftS;  
  this.menuFile_SaveAs.Text   =   "保存为...";  
  this.menuFile_SaveAs.Click   +=   new   System.EventHandler(this.menuFile_SaveAs_Click);  
  //    
  //   menuFile_Line1  
  //    
  this.menuFile_Line1.Index   =   4;  
  this.menuFile_Line1.Text   =   "-";  
  //    
  //   menuFile_Exit  
  //    
  this.menuFile_Exit.Index   =   5;  
  this.menuFile_Exit.Shortcut   =   System.Windows.Forms.Shortcut.CtrlE;  
  this.menuFile_Exit.Text   =   "退出";  
  this.menuFile_Exit.Click   +=   new   System.EventHandler(this.menuFile_Exit_Click);  
  //    
  //   menuEdit  
  //    
  this.menuEdit.Index   =   1;  
  this.menuEdit.MenuItems.AddRange(new   System.Windows.Forms.MenuItem[]   {  
    this.menuEdit_Undo,  
    this.menuEdit_Redo,  
    this.menuEdit_Cut,  
    this.menuEdit_Copy,  
    this.menuEdit_Paste,  
    this.menuEdit_Del});  
  this.menuEdit.Text   =   "编辑";  
  //    
  //   menuEdit_Undo  
  //    
  this.menuEdit_Undo.Index   =   0;  
  this.menuEdit_Undo.Shortcut   =   System.Windows.Forms.Shortcut.CtrlZ;  
  this.menuEdit_Undo.Text   =   "撤消";  
  this.menuEdit_Undo.Click   +=   new   System.EventHandler(this.menuEdit_Undo_Click);  

//    
  //   menuEdit_Redo  
  //    
  this.menuEdit_Redo.Enabled   =   false;  
  this.menuEdit_Redo.Index   =   1;  
  this.menuEdit_Redo.Shortcut   =   System.Windows.Forms.Shortcut.CtrlR;  
  this.menuEdit_Redo.Text   =   "重做";  
  this.menuEdit_Redo.Click   +=   new   System.EventHandler(this.menuEdit_Undo_Click);  
  //    
  //   menuEdit_Cut  
  //    
  this.menuEdit_Cut.Index   =   2;  
  this.menuEdit_Cut.Shortcut   =   System.Windows.Forms.Shortcut.CtrlX;  
  this.menuEdit_Cut.Text   =   "剪切";  
  this.menuEdit_Cut.Click   +=   new   System.EventHandler(this.menuEdit_Cut_Click);  
  //    
  //   menuEdit_Copy  
  //    
  this.menuEdit_Copy.Index   =   3;  
  this.menuEdit_Copy.Shortcut   =   System.Windows.Forms.Shortcut.CtrlC;  
  this.menuEdit_Copy.Text   =   "复制";  
  this.menuEdit_Copy.Click   +=   new   System.EventHandler(this.menuEdit_Copy_Click);  
  //    
  //   menuEdit_Paste  
  //    
  this.menuEdit_Paste.Index   =   4;  
  this.menuEdit_Paste.Shortcut   =   System.Windows.Forms.Shortcut.CtrlV;  
  this.menuEdit_Paste.Text   =   "粘贴";  
  this.menuEdit_Paste.Click   +=   new   System.EventHandler(this.menuEdit_Paste_Click);  
  //    
  //   menuEdit_Del  
  //    
  this.menuEdit_Del.Index   =   5;  
  this.menuEdit_Del.Shortcut   =   System.Windows.Forms.Shortcut.Del;  
  this.menuEdit_Del.Text   =   "删除";  
  this.menuEdit_Del.Click   +=   new   System.EventHandler(this.menuEdit_Del_Click);  
  //    
  //   menuHelp  
  //    
  this.menuHelp.Index   =   2;  
  this.menuHelp.MenuItems.AddRange(new   System.Windows.Forms.MenuItem[]   {  
    this.menuHelp_About});  
  this.menuHelp.Text   =   "帮助";  
  this.menuHelp.Click   +=   new   System.EventHandler(this.menuHelp_Click);  
  //    
  //   menuHelp_About  
  //    
  this.menuHelp_About.Index   =   0;  
  this.menuHelp_About.Shortcut   =   System.Windows.Forms.Shortcut.F1;  
  this.menuHelp_About.Text   =   "关于...";  
  this.menuHelp_About.Click   +=   new   System.EventHandler(this.menuHelp_About_Click);  
  //    
  //   openFileDialog  
  //    
  this.openFileDialog.DefaultExt   =   "*.TXT,   *.CS";  
  this.openFileDialog.Filter   =   "(*.TXT;   *.CS)|*.TXT;   *.CS|(All   Files)|*.*";  
  this.openFileDialog.FileOk   +=   new   System.ComponentModel.CancelEventHandler(this.openFileDialog_FileOk);  
  //    
  //   saveFileDialog  
  //    
  this.saveFileDialog.FileName   =   "FileName";  
  this.saveFileDialog.Filter   =   "Text   File   (*.TXT)|*.TXT|C   Sharp   File   (*.CS))|*.CS";  
  this.saveFileDialog.FileOk   +=   new   System.ComponentModel.CancelEventHandler(this.saveFileDialog_FileOk);  
  //    
  //   menuEdit_Line1  
  //    
  this.menuEdit_Line1.Index   =   -1;  
  this.menuEdit_Line1.Text   =   "";  
  //    
  //   statusBar  
  //    
  this.statusBar.Font   =   new   System.Drawing.Font("SimSun",   9F,   System.Drawing.FontStyle.Regular,   System.Drawing.GraphicsUnit.Point,   ((System.Byte)(0)));  
  this.statusBar.Location   =   new   System.Drawing.Point(0,   408);  
  this.statusBar.Name   =   "statusBar";  
  this.statusBar.ShowPanels   =   true;  
  this.statusBar.Size   =   new   System.Drawing.Size(632,   22);  
  this.statusBar.TabIndex   =   1;  
  this.statusBar.Text   =   "状态栏";  
  this.statusBar.PanelClick   +=   new   System.Windows.Forms.StatusBarPanelClickEventHandler(this.statusBar_PanelClick);  
  //    
  //   NotePad  
  //    
  this.AutoScaleBaseSize   =   new   System.Drawing.Size(5,   13);  
  this.ClientSize   =   new   System.Drawing.Size(632,   430);  
  this.Controls.AddRange(new   System.Windows.Forms.Control[]   {  
      this.statusBar,  
      this.textBox});  
  this.Icon   =   ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));  
  this.Menu   =   this.mainMenu;  
  this.Name   =   "NotePad";  
  this.Text   =   "三毛.Net   之   C#记事本";  
  this.Load   +=   new   System.EventHandler(this.NotePad_Load);  
  this.ResumeLayout(false);  
   
  }  
  #endregion  
   
  ///   <summary>  
  ///   The   main   entry   point   for   the   application.  
  ///   </summary>  
  [STAThread]  
  static   void   Main()    
  {  
  Application.Run(new   NotePad());  
  }  
  private   void   NotePad_Load(object   sender,   EventArgs   e)  
  {  
  }  
   
  private   void   menuHelp_Click(object   sender,   EventArgs   e)  
  {  
  }  
   
  private   void   openFileDialog_FileOk(object   sender,   CancelEventArgs   e)  
  {  
  }  
   
  private   void   saveFileDialog_FileOk(object   sender,   CancelEventArgs   e)  
  {  
  }  
   
  private   void   menuFile_Open_Click(object   sender,   EventArgs   e) //打开文件  
  {  
  if   (openFileDialog.ShowDialog()   ==   DialogResult.OK)  
  {  
  StreamReader   sr   =   new   StreamReader(openFileDialog.FileName,   Encoding.Default);  
  oldFileName   =   openFileDialog.FileName;  
  textBox.Text   =   sr.ReadToEnd();  
  sr.Close();  
  }  
  }  
   
  private   void   menuFile_New_Click(object   sender,   System.EventArgs   e)  
  {  
  textBox.Text   =   "这是新建立的文件，程序设计时可以有1M的文件大小，请放心使用吧。";  
  oldFileName   =   "";  
  }  
   
  private   void   menuFile_Save_Click(object   sender,   EventArgs   e) //保存文件  
  {  
  if   (oldFileName   ==   "")  
  {  
  menuFile_SaveAs_Click(sender,   e);  
  }  
  else  
  {  
  StreamWriter   sw   =   new   StreamWriter(oldFileName);  
  sw.Write(textBox.Text);  
  sw.Close();  
  }  
  }  
   
   
  private   void   menuFile_SaveAs_Click(object   sender,   EventArgs   e) //另存文件  
  {  
  if   (saveFileDialog.ShowDialog()   ==   DialogResult.OK)  
  {  
  StreamWriter   asw   =   new   StreamWriter(saveFileDialog.FileName,   true);  
  asw.Write(textBox.Text);  
  asw.Close();  
  }  
  }  
   
  private   void   menuFile_Exit_Click(object   sender,   EventArgs   e) //关闭主程序  
  {  
  Close();  
  }  
   
   
  private   void   menuHelp_About_Click(object   sender,   EventArgs   e) //打开“关于”窗口  
  {  
  (new   About()).ShowDialog();  
  }  
   
  private   void   textBox_TextChanged(object   sender,   EventArgs   e) //内容主体文本框  
  {  
  }  
   
  private   void   menuEdit_Undo_Click(object   sender,   System.EventArgs   e)  
  {  
  menuEdit_Redo.Enabled=true;  
  textBox.Undo();  
  }  
   
  private   void   menuEdit_Cut_Click(object   sender,   System.EventArgs   e)  
  {  
  textBox.Cut();  
  }  
   
  private   void   menuEdit_Copy_Click(object   sender,   System.EventArgs   e)  
  {  
  textBox.Copy();  
  }  
   
  private   void   menuEdit_Paste_Click(object   sender,   System.EventArgs   e)  
  {  
  textBox.Paste();  
  }  
   
  private   void   menuEdit_Del_Click(object   sender,   System.EventArgs   e)  
  {  
  textBox.SelectedText   =   "";  
  }  
   
  private   void   statusBar_PanelClick(object   sender,   System.Windows.Forms.StatusBarPanelClickEventArgs   e)  
  {  
  }  
  }  
  }