这篇文章主要介绍了C#如何实现简单记事本程序,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
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具体内容如下
编程语言: C#
编程环境: Visual Studio 2013
运行环境: .NET Framework 4.5
预览:

功能:
标题栏
显示文件标题
菜单栏
各类菜单命令
文件- 新建
- 打开
- 保存
- 另存为
- 页面设置
- 打印
- 退出
编辑
- 撤销
- 剪切
- 复制
- 粘贴
- 全选
- 时间/日期
格式
- 自动换行
- 字体
视图
- 状态栏
- 工具栏
- 全屏模式
帮助
- 开源许可
- 查看帮助
- 关于
工具栏
常用工具集合
标签栏
文件标签显示
工作区
编辑区
状态栏
显示文件状态
文本状态(新建/已修改)
- 字符个数 
- 光标坐标 
- 功能实现 
本程序有两个窗体,分别为Form1和AboutBox1
所有文件如下:

对于Form1:
需要引入的类库:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;
窗体及空间声明代码:
private System.Windows.Forms.MenuStrip menuStrip1; private System.Windows.Forms.ToolStripMenuItem 文件ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 新建ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 打开ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 保存ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 另存为ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 编辑ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 格式ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 退出ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 关于ToolStripMenuItem; private System.Windows.Forms.TextBox editBox1; private System.Windows.Forms.ToolStripMenuItem 撤销ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 剪切ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 复制ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 粘贴ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 删除ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 全选AToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 日期DToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 格式ToolStripMenuItem1; private System.Windows.Forms.ToolStripMenuItem 字体ToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 查看VToolStripMenuItem; private System.Windows.Forms.ToolStripMenuItem 状态栏ToolStripMenuItem; private System.Windows.Forms.StatusStrip statusStrip1; private System.Windows.Forms.SaveFileDialog saveFileDialog1; private System.Windows.Forms.ToolStripSeparator toolStripMenuItem1; private System.Windows.Forms.ToolStripSeparator toolStripMenuItem3; private System.Windows.Forms.ToolStripSeparator toolStripMenuItem4; private System.Windows.Forms.ToolStripMenuItem 页面设置UToolStripMenuItem; private System.Drawing.Printing.PrintDocument printDocument1; private System.Windows.Forms.PageSetupDialog pageSetupDialog1; private System.Windows.Forms.ToolStripMenuItem 打印PToolStripMenuItem; private System.Windows.Forms.PrintDialog printDialog1; private System.Windows.Forms.ToolStripMenuItem 查看帮助HToolStripMenuItem; private System.Windows.Forms.ToolStripSeparator toolStripMenuItem5; private System.Windows.Forms.ToolStripMenuItem 自动换行ToolStripMenuItem; private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel1; public System.Windows.Forms.Timer timer1; private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel2; private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel3; private System.Windows.Forms.ToolStripMenuItem 全屏模式ToolStripMenuItem; private System.Windows.Forms.ToolStrip toolStrip1; private System.Windows.Forms.ToolStripButton newButton; private System.Windows.Forms.ToolStripButton openButton; private System.Windows.Forms.ToolStripButton saveButton; private System.Windows.Forms.ToolStripButton saveAsButton; private System.Windows.Forms.ToolStripSeparator toolStripSeparator1; private System.Windows.Forms.ToolStripButton cutButton; private System.Windows.Forms.ToolStripButton copyButton; private System.Windows.Forms.ToolStripButton pasteButton; private System.Windows.Forms.ToolStripButton deleteButton; private System.Windows.Forms.ToolStripSeparator toolStripSeparator2; private System.Windows.Forms.ToolStripButton timeButton; private System.Windows.Forms.ToolStripButton fullButton; private System.Windows.Forms.ToolStripButton textButton; private System.Windows.Forms.ToolStripMenuItem 工具栏ToolStripMenuItem; private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel4; private System.Windows.Forms.ToolStripMenuItem 开源许可OToolStripMenuItem; private System.Windows.Forms.TabControl tabControl1; private System.Windows.Forms.TabPage tabPage1; private System.Windows.Forms.TabPage tabPage2; private System.Windows.Forms.TextBox editBox2;1
窗体载入:
private void Form1_Load(object sender, EventArgs e)
  {
   this.editBox1.ScrollBars = ScrollBars.Both;
   this.editBox2.ScrollBars = ScrollBars.Both;
   this.Text = textFileName + " - " + programeName;//显示文件名
   this.timer1.Start();
   editBox1.Focus();
  }首先进行一些固定变量声明:
private string textFileName = "无标题"; private string programeName = "Icey"; private string filePath = ""; private string asFilePath = ""; private string selecteText = ""; private string helpUrl = "https://blog.mayuko.cn/icey"; private string openSourceUrl = "https://github.com/mayuko2012/icey"; private string wrongMessage = "你好像遇到了错误..."; private string fileFormat = "文本文件(*.txt)|*.txt|Icey文件(*.ice)|*.ice|C++文件(*.cpp)|*.cpp|C文件(*.c)|*.c|所有文件(*.*)|(*.*)"; private string tabFileName1 = "无标题1 - Icey"; private string tabFileName2 = "无标题2 - Icey"; Boolean saveFileStatus1 = false; Boolean textChanged1 = false; Boolean saveFileStatus2 = false; Boolean textChanged2 = false;
保存文件采用函数形式:
private void saveFile()//保存
  {
   if (!textFileName.Equals(""))
   {
    SaveFileDialog saveFile = new SaveFileDialog();
    saveFile.Filter = fileFormat;
    saveFile.FileName = "*.txt";
    if (saveFile.ShowDialog() == DialogResult.OK)
    {
     filePath = saveFile.FileName;
     StreamWriter sw = new StreamWriter(filePath, false, Encoding.Default);
     sw.Write((editBox1.Focused) ? editBox1.Text : editBox2.Text);
     sw.Close();
     if (editBox1.Focused)
     {
      tabFileName1 = saveFile.FileName + " - " + programeName;
      saveFileStatus1 = true;
     }
     else if (editBox2.Focused)
     {
      tabFileName2 = saveFile.FileName + " - " + programeName;
      saveFileStatus2 = true;
     }
    }
   }
   toolStripStatusLabel4.Text = "已保存";
  }另存为采用函数形式:
private void saveAsFile()//另存为
  {
   SaveFileDialog saveAsFile = new SaveFileDialog();
   saveAsFile.Filter = fileFormat;
   saveAsFile.FileName = "*.txt";
   if (saveAsFile.ShowDialog() == DialogResult.OK)
   {
    asFilePath = saveAsFile.FileName;
    StreamWriter sw = new StreamWriter(asFilePath, false, Encoding.Default);
    sw.WriteLine((editBox1.Focused) ? editBox1.Text : editBox2.Text);
    sw.Close();
    FileInfo fileInfo = new FileInfo(saveAsFile.FileName);
    textFileName = fileInfo.Name;
   }
   toolStripStatusLabel4.Text = "已保存";
}新建函数:
 private void newFile()//新建
  {
   if (editBox1.Focused)
   {
    if (editBox1.Text != String.Empty && saveFileStatus1 == false && textChanged1 == true)//如果文本框不为空
    {
     DialogResult result = MessageBox.Show("是否将窗口1已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
     if (result == DialogResult.Yes)
     {
      saveFile();
      Application.Exit();
     }
     else if (result == DialogResult.No)
     {
      editBox1.Text = "";
     }
    }
    else
     editBox1.Text = "";
   }
   else if (editBox2.Focused)
   {
    if (editBox2.Text != String.Empty && saveFileStatus2 == false && textChanged2 == true)//如果文本框不为空
    {
     DialogResult result = MessageBox.Show("是否将窗口2已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
     if (result == DialogResult.Yes)
     {
      saveFile();
      Application.Exit();
     }
     else if (result == DialogResult.No)
     {
      editBox2.Text = "";
     }
    }
    else
     editBox2.Text = "";
   }
 }打开文件函数:
private void openFile()//打开
   {
    OpenFileDialog openFile = new OpenFileDialog();
    openFile.Filter = fileFormat;
    if (openFile.ShowDialog() == DialogResult.OK)
    {
     StreamReader sr = new StreamReader(openFile.FileName, Encoding.Default);
     if (editBox1.Focused)
     {
      editBox1.Text = sr.ReadToEnd();
     }
     else if(editBox2.Focused)
     {
      editBox2.Text = sr.ReadToEnd();
     }
     sr.Close();
     FileInfo fileInfo = new FileInfo(openFile.FileName);
     if (editBox1.Focused)
     {
      tabFileName1 = fileInfo.Name + " - " + programeName;
      saveFileStatus1 = true;
     }
     else if (editBox2.Focused)
     {
      tabFileName2 = fileInfo.Name + " - " + programeName;
      saveFileStatus2 = true;
     }
     textFileName = fileInfo.Name;
    }
}全屏模式函数:
private void fullScreen()//全屏
  {
   if (全屏模式ToolStripMenuItem.Checked == false)
   {
    this.WindowState = FormWindowState.Maximized;
    全屏模式ToolStripMenuItem.Checked = true;
    this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
   }
   else
   {
    this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Sizable;
    this.WindowState = FormWindowState.Normal;
    全屏模式ToolStripMenuItem.Checked = false;
   }
}退出菜单命令:
private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Text != String.Empty || saveFileStatus1 == false && textChanged1 == true)
   {
    this.tabPage1.Show();
    this.editBox1.Focus();
    DialogResult result = MessageBox.Show("是否将窗口1已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
    if (result == DialogResult.Yes)
    {
     saveFile();
     Application.Exit();
    }
    else if (result == DialogResult.No)
    {
     Application.Exit();
    }
   }
   else if (editBox2.Text != String.Empty || saveFileStatus2 == false && textChanged2 == true)
   {
    this.tabPage2.Show();
    this.editBox2.Focus();
    DialogResult result = MessageBox.Show("是否将窗口2已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
    if (result == DialogResult.Yes)
    {
     saveFile();
     Application.Exit();
    }
    else if (result == DialogResult.No)
    {
     Application.Exit();
    }
   }
   else
    Application.Exit();
}Bool变量,用于判断TextBox是否发生变化:
private void textBox1_TextChanged(object sender, EventArgs e)
  {
   textChanged2 = true;
   toolStripStatusLabel4.Text = "已修改";
  }
  private void editBox2_TextChanged(object sender, EventArgs e)
  {
   textChanged2 = true;
   toolStripStatusLabel4.Text = "已修改";
  }新建菜单命令:
private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
 {
   newFile();
  }打开菜单命令:
private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
 {
   openFile();
  }字体菜单命令:
private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   FontDialog fontDialog = new FontDialog();
   if (fontDialog.ShowDialog() == DialogResult.OK)
   {
    if (editBox1.Focused)
    {
     editBox1.Font = fontDialog.Font;
    }
    else
     editBox2.Font = fontDialog.Font;
   }
  }退出动作(当用户点击窗体右上角退出按钮时执行此操作):
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
  {
   if (editBox1.Text != String.Empty && e.CloseReason == CloseReason.UserClosing || saveFileStatus1 == false && textChanged1 == true)//如果文本框不为空&&触发关闭按钮事件
   {
    this.tabPage1.Show();
    this.editBox1.Focus();
    DialogResult result = MessageBox.Show("是否将窗体1已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
    if (result == DialogResult.Yes)
    {
     saveFile();
     e.Cancel = false;
    }
    else if (result == DialogResult.No)
    {
     e.Cancel = false;
    }
    else if (result == DialogResult.Cancel)
    {
     e.Cancel = true;
    }
   }
   else if (editBox2.Text != String.Empty && e.CloseReason == CloseReason.UserClosing || saveFileStatus2 == false && textChanged2 == true)//如果文本框不为空&&触发关闭按钮事件
   {
    this.tabPage2.Show();
    this.editBox2.Focus();
    DialogResult result = MessageBox.Show("是否将窗口2已编辑文件保存到 " + textFileName, wrongMessage, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
    if (result == DialogResult.Yes)
    {
     saveFile();
     e.Cancel = false;
    }
    else if (result == DialogResult.No)
    {
     e.Cancel = false;
    }
    else if (result == DialogResult.Cancel)
    {
     e.Cancel = true;
    }
   }
   else
    Application.Exit();
  }状态栏命令(状态栏是否显示):
private void 状态栏ToolStripMenuItem_Click(object sender, EventArgs e)
 {
   if (状态栏ToolStripMenuItem.Checked == true)
   {
    状态栏ToolStripMenuItem.Checked = false;
    statusStrip1.Visible = false;
   }
   else
   {
    状态栏ToolStripMenuItem.Checked = true;
    statusStrip1.Visible = true;
   }
}编辑命令:
private void 编辑ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if ((editBox1.SelectedText.Equals("")))
   {
    剪切ToolStripMenuItem.Enabled = false;
    复制ToolStripMenuItem.Enabled = false;
    删除ToolStripMenuItem.Enabled = false;
   }
   else
   {
    剪切ToolStripMenuItem.Enabled = true;
    复制ToolStripMenuItem.Enabled = true;
    删除ToolStripMenuItem.Enabled = true;
   }
  }全选命令:
private void 全选AToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.SelectAll();
   }
   else
    this.editBox2.SelectAll();
  }剪切 复制 粘贴 删除命令:
private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    selecteText = editBox1.SelectedText;
    this.editBox1.Cut();
   }
   else
   {
    selecteText = editBox2.SelectedText;
    this.editBox2.Cut();
   }
  }
  private void 撤销ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.Undo();
   }
   else
    this.editBox2.Undo();
  }
  private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.Copy();
   }
   else
    this.editBox2.Copy();
  }
  private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.Paste();
   }
   else
    this.editBox2.Paste();
  }
  private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.SelectedText = "";
   }
   else
    this.editBox2.SelectedText = "";
  }保存命令:
private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
 {
   saveFile();
  }另存为命令:
private void 另存为ToolStripMenuItem_Click(object sender, EventArgs e)
 {
   saveAsFile();
  }时间戳命令:
private void 日期DToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    editBox1.AppendText(System.DateTime.Now.ToString());
   }
   else
    editBox2.AppendText(System.DateTime.Now.ToString());
  }页面设置命令:
private void 页面设置UToolStripMenuItem_Click(object sender, EventArgs e)
  {
   pageSetupDialog1.Document = printDocument1;
   this.pageSetupDialog1.AllowMargins = true;
   this.pageSetupDialog1.AllowOrientation = true;
   this.pageSetupDialog1.AllowPaper = true;
   this.pageSetupDialog1.AllowPrinter = true;
   this.pageSetupDialog1.Document = this.printDocument1;
   pageSetupDialog1.ShowDialog();
  }打印命令:
private void 打印PToolStripMenuItem_Click(object sender, EventArgs e)
  {
   this.printDialog1.Document = this.printDocument1;
   this.printDialog1.PrinterSettings = this.pageSetupDialog1.PrinterSettings;
   if (this.printDialog1.ShowDialog() == DialogResult.OK)
   {
    try
    {
     this.printDocument1.Print();
    }
    catch (Exception ex)
    {
     MessageBox.Show(ex.Message, wrongMessage, MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
   }
  }查看帮助 关于命令:
private void 查看帮助HToolStripMenuItem_Click(object sender, EventArgs e)
  {
   System.Diagnostics.Process.Start(helpUrl); 
  }
  private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   AboutBox1 about = new AboutBox1();
   about.StartPosition = FormStartPosition.CenterScreen; 
   about.Show();
   about.Owner = this;
   //timer1.Stop();
  }自动换行命令:
private void 自动换行ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (自动换行ToolStripMenuItem.Checked == true)
   {
    editBox1.WordWrap = false;
    editBox2.WordWrap = false;
    自动换行ToolStripMenuItem.Checked = false;
   }
   else
   {
    editBox1.WordWrap = true;
    editBox2.WordWrap = true;
    自动换行ToolStripMenuItem.Checked = true;
   }
  }计时器(100 ms刷新频率):
 private void timer1_Tick(object sender, EventArgs e)
  {
   toolStripStatusLabel1.Text = (editBox1.Focused) ? editBox1.Text.Length.ToString() + " 个字符" : editBox2.Text.Length.ToString() + " 个字符";
   int totalline = (editBox1.Focused) ? editBox1.GetLineFromCharIndex(editBox1.Text.Length) + 1 : editBox2.GetLineFromCharIndex(editBox2.Text.Length) + 1;//得到总行数
   int index = (editBox1.Focused) ? editBox1.GetFirstCharIndexOfCurrentLine() : editBox2.GetFirstCharIndexOfCurrentLine();//得到当前行第一个字符的索引
   int line = (editBox1.Focused) ? editBox1.GetLineFromCharIndex(index) + 1 : editBox2.GetLineFromCharIndex(index) + 1;//得到当前行的行号
   int col = (editBox1.Focused) ? editBox1.SelectionStart - index + 1 : editBox2.SelectionStart - index + 1;//.SelectionStart得到光标所在位置的索引 - 当前行第一个字符的索引 = 光标所在的列数
   toolStripStatusLabel2.Text = "第" + line + "行,第" + col + "列";
   if (( (editBox1.Focused) ? editBox1.SelectedText.Equals(""):editBox2.SelectedText.Equals("")))
   {
    cutButton.Enabled = false;
    copyButton.Enabled = false;
    deleteButton.Enabled = false;
   }
   else
   {
    cutButton.Enabled = true;
    copyButton.Enabled = true;
    deleteButton.Enabled = true;
   }
   if (editBox1.Focused)
   {
    editBox1.Focus();
    this.Text = tabFileName1;
   }
   else
   {
    editBox2.Focus();
    this.Text = tabFileName2;
   }
   if (editBox2.Focused)
   {
    editBox2.Focus();
    this.Text = tabFileName2;
   }
   else
   {
    editBox1.Focus();
    this.Text = tabFileName1;
   }
  }工具栏命令(工具栏是否显示):
private void 工具栏ToolStripMenuItem_Click(object sender, EventArgs e)
  {
   if (工具栏ToolStripMenuItem.Checked == false)
   {
    toolStrip1.Visible = true;
    工具栏ToolStripMenuItem.Checked = true;
   }
   else if(工具栏ToolStripMenuItem.Checked == true)
   {
    toolStrip1.Visible = false;
    工具栏ToolStripMenuItem.Checked = false;
   }
  }开源许可命令:
private void 开源许可OToolStripMenuItem_Click(object sender, EventArgs e)
  {
   System.Diagnostics.Process.Start(openSourceUrl); 
  }工具栏的各个按钮:
private void newButton_Click(object sender, EventArgs e)
  {
   newFile();
  }
  private void openButton_Click(object sender, EventArgs e)
  {
   openFile();
  }
  private void saveButton_Click(object sender, EventArgs e)
  {
   saveFile();
  }
  private void saveAsButton_Click(object sender, EventArgs e)
  {
   saveAsFile();
  }
  private void cutButton_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    selecteText = editBox1.SelectedText;
    this.editBox1.Cut();
   }
   else
   {
    selecteText = editBox2.SelectedText;
    this.editBox2.Cut();
   }
  }
  private void copyButton_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.Copy();
   }
   else
    this.editBox2.Copy();
  }
  private void pasteButton_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.Paste();
   }
   else
    this.editBox2.Paste();
  }
  private void deleteButton_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    this.editBox1.SelectedText = "";
   }
   else
    this.editBox2.SelectedText = "";
  }
  private void timeButton_Click(object sender, EventArgs e)
  {
   if (editBox1.Focused)
   {
    editBox1.AppendText(System.DateTime.Now.ToString());
   }
   else
    editBox2.AppendText(System.DateTime.Now.ToString());
  }
  private void textButton_Click(object sender, EventArgs e)
  {
   FontDialog fontDialog = new FontDialog();
   if (fontDialog.ShowDialog() == DialogResult.OK)
   {
    if (editBox1.Focused)
    {
     editBox1.Font = fontDialog.Font;
    }
    else
     editBox2.Font = fontDialog.Font;
   }
  }
  private void fullButton_Click(object sender, EventArgs e)
  {
   fullScreen(); 
}标签栏:
private void tabPage1_Click(object sender, EventArgs e)
  {
   editBox1.Focus();
   this.Text = tabPage1.Text;
   if (textChanged1 == false)
   {
    toolStripStatusLabel4.Text = "新建";
   }
  }
  private void tabPage2_Click(object sender, EventArgs e)
  {
   editBox2.Focus();
   this.Text = tabPage2.Text;
   if (textChanged2 == false)
   {
    toolStripStatusLabel4.Text = "新建";
   }
  }对于AboutBox:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Notepad
{
 partial class AboutBox1 : Form
 {
  public AboutBox1()
  {
   InitializeComponent();
   this.Text = String.Format("关于 {0}", AssemblyTitle);
   this.labelProductName.Text = AssemblyProduct;
   this.labelVersion.Text = String.Format("版本 {0}", AssemblyVersion);
   this.labelCopyright.Text = AssemblyCopyright;
   this.labelCompanyName.Text = AssemblyCompany;
   this.textBoxDescription.Text = AssemblyDescription;
  }
  #region 程序集特性访问器
  public string AssemblyTitle
  {
   get
   {
    object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyTitleAttribute), false);
    if (attributes.Length > 0)
    {
     AssemblyTitleAttribute titleAttribute = (AssemblyTitleAttribute)attributes[0];
     if (titleAttribute.Title != "")
     {
      return titleAttribute.Title;
     }
    }
    return System.IO.Path.GetFileNameWithoutExtension(Assembly.GetExecutingAssembly().CodeBase);
   }
  }
  public string AssemblyVersion
  {
   get
   {
    return Assembly.GetExecutingAssembly().GetName().Version.ToString();
   }
  }
  public string AssemblyDescription
  {
   get
   {
    object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyDescriptionAttribute), false);
    if (attributes.Length == 0)
    {
     return "";
    }
    return ((AssemblyDescriptionAttribute)attributes[0]).Description;
   }
  }
  public string AssemblyProduct
  {
   get
   {
    object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyProductAttribute), false);
    if (attributes.Length == 0)
    {
     return "";
    }
    return ((AssemblyProductAttribute)attributes[0]).Product;
   }
  }
  public string AssemblyCopyright
  {
   get
   {
    object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
    if (attributes.Length == 0)
    {
     return "";
    }
    return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
   }
  }
  public string AssemblyCompany
  {
   get
   {
    object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCompanyAttribute), false);
    if (attributes.Length == 0)
    {
     return "";
    }
    return ((AssemblyCompanyAttribute)attributes[0]).Company;
   }
  }
  #endregion
  private void AboutBox1_Load(object sender, EventArgs e)
  {
  }
  private void okButton_Click(object sender, EventArgs e)
  {
   MessageBox.Show("已是最新版本!", "检查更新");
  }
  private void AboutBox1_FormClosing(object sender, FormClosingEventArgs e)
  {
   Form1 frm1 = (Form1)this.Owner;
   frm1.timer1.Start();
  }
 }
}C#是什么
C#是一个简单、通用、面向对象的编程语言,它由微软Microsoft开发,继承了C和C++强大功能,并且去掉了一些它们的复杂特性,C#综合了VB简单的可视化操作和C++的高运行效率,以其强大的操作能力、优雅的语法风格、创新的语言特性和便捷的面向组件编程从而成为.NET开发的首选语言,但它不适用于编写时间急迫或性能非常高的代码,因为C#缺乏性能极高的应用程序所需要的关键功能。
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本文名称:C#如何实现简单记事本程序
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