C#记事本源代码（winFrom）

 

以下是主窗体源代码:

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.Runtime.InteropServices;
//引用类的申明

namespace WindowsApplication1//名称空间的申明
{
    publicpartial class MainForm : Form//主窗口
    {
       public MainForm()
       {
           InitializeComponent();
       }
       //
       //人机交互是通过操作人员对事件的操作来实现的，以下为事件的实现代码
       //

       //新建文本
       private void MenuItem7_Click(object sender, EventArgs e)
       {
           //如果当前文本内容处于修改状态，则提示保存
           if (textBox1.Modified == true)
           {
               DialogResult re = MessageBox.Show("文件" + Text +"的内容已改变，需要保存吗？", "保存文件",MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
               switch (re)
               {
                   case DialogResult.Yes:
                       this.MenuItem9_Click(sender, e);
                       textBox1.Clear();
                       this.lastsavename = "";
                       this.Text = "新建－记事本";
                       break;
                   case DialogResult.No:
                       textBox1.Clear();
                       this.lastsavename = "";
                       this.Text = "新建－记事本";
                       break;
                   case DialogResult.Cancel:
                       break;
               }
           }
           else
           {
               textBox1.Clear();
               this.lastsavename = "";
               this.Text = "新建－记事本";
               textBox1.Modified = false;
           }
       }

       //打开文件
       private void MenuItem8_Click(object sender, EventArgs e)
       {
           try//捕获异常事件
           {
               //如果当前文本内容被修改，则提示保存
               if (textBox1.Modified == true)
               {
                   //提示保存对话框
                   DialogResult re = MessageBox.Show("文件" + this.Text +"的内容已经改变,是否需要保存？", "保存文件",MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                   if (re == DialogResult.Cancel)
                   {
                       return;
                   }
                   if (re == DialogResult.OK)
                   {
                       this.MenuItem9_Click(sender, e);
                   }
               }
               openFileDialog1.Title = "打开";
               openFileDialog1.FileName = "";
               if (openFileDialog1.ShowDialog() == DialogResult.OK)
               {

                   //打开选定路径上的文件
                   StreamReader sr = new StreamReader(openFileDialog1.FileName,Encoding.Default);
                   this.lastsavename = openFileDialog1.FileName;
                   this.Text = Path.GetFileNameWithoutExtension(this.lastsavename) +"－记事本";
                   textBox1.Text = sr.ReadToEnd();
                   sr.Close();
               }
           }
           //处理异常事件
           catch (Exception error)
           {
               MessageBox.Show(error.Message.ToString());
           }
       }

       //保存文件
       private void MenuItem9_Click(object sender, EventArgs e)
       {
           //捕获异常事件
           try
           {
               if (this.lastsavename == "")
               {
                   saveFileDialog1.Title = "保存";
                   saveFileDialog1.FileName = "*.txt";
                   if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                   {
                       //保存的实现
                       this.lastsavename = saveFileDialog1.FileName;
                       using (StreamWriter sw = newStreamWriter(saveFileDialog1.FileName))
                       {
                           sw.Write(textBox1);
                           sw.Close();
                           textBox1.Modified = false;
                           this.Text =Path.GetFileNameWithoutExtension(saveFileDialog1.FileName) +"－记事本";
                       }
                   }
               }
               else
               {
                   textBox1.SaveFile(this.lastsavename,RichTextBoxStreamType.PlainText);
                   textBox1.Modified = false;
               }
           }
           //处理异常事件
           catch (Exception er)
           {
               MessageBox.Show(er.Message.ToString());
           }

       }
       //另存为：
       private void MenuItem10_Click(object sender, EventArgs e)
       {
           try
           {
               saveFileDialog1.Title = "另存为";
               saveFileDialog1.FileName = "*.txt";
               if (saveFileDialog1.ShowDialog() == DialogResult.OK)
               {
                   StreamWriter sw = new StreamWriter(saveFileDialog1.FileName);
                   sw.Write(textBox1);
                   textBox1.Modified = false;
                   this.lastsavename = saveFileDialog1.FileName;
                   sw.Close();
                   this.Text =Path.GetFileNameWithoutExtension(saveFileDialog1.FileName) +"－记事本";
               }
           }
           catch (Exception er)
           {
               MessageBox.Show(er.Message.ToString());
           }
       }

       //页面设置
       private void MenuItem11_Click(object sender, EventArgs e)
       {
           try
           {
               if (pageSetupDialog1.ShowDialog() == DialogResult.OK)
               {
                   pageSetupDialog1.ShowDialog();
               }
           }
           catch (Exception err)
           {
               MessageBox.Show(err.Message.ToString());
           }
       }

       //打印
       private void MenuItem12_Click(object sender, EventArgs e)
       {
           try
           {
               if (printDialog1.ShowDialog() == DialogResult.OK)
               {
                   printDialog1.ShowDialog();
               }
           }
           catch (Exception err)
           {
               MessageBox.Show(err.Message.ToString());
           }
       }

       //退出
       private void MenuItem14_Click(object sender, EventArgs e)
       {
           this.Close();
       }

       //编辑－撤消
       private void MenuItem15_Click(object sender, EventArgs e)
       {
           if (textBox1.CanUndo == true)
           {
               textBox1.Undo();
               textBox1.ClearUndo();
           }
       }

       //编辑－剪切
       private void MenuItem17_Click(object sender, EventArgs e)
       {
           if (textBox1.SelectedText != "")
           {
               textBox1.Cut();
           }
       }

       //编辑－复制
       private void MenuItem18_Click(object sender, EventArgs e)
       {
           textBox1.Copy();
       }

       //编辑－粘贴
       private void MenuItem19_Click(object sender, EventArgs e)
       {
           if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) ==true)
           {
               textBox1.Paste();
           }
       }

       //编辑－删除
       private void MenuItem20_Click(object sender, EventArgs e)
       {
           if (textBox1.SelectedText != "")
           {
               textBox1.SelectedText = "";
           }
       }

       //编辑－全选
       private void MenuItem27_Click(object sender, EventArgs e)
       {
           textBox1.SelectAll();
       }

       //查找　　　
       private void MenuItem22_Click(object sender, EventArgs e)
       {
           new Find(textBox1).Show();
       }

       //查找下一个，与查找相同的调用方法
       private void MenuItem23_Click(object sender, EventArgs e)
       {
           new Find(textBox1).Show();
       }

       //覆盖
       private void MenuItem24_Click(object sender, EventArgs e)
       {
           new Replace(textBox1).Show();
       }

       //跳转
       private void MenuItem25_Click(object sender, EventArgs e)
       {
           new Goto(textBox1).Show();
       }

       //时间/曰期,加到文本最后
       private void MenuItem28_Click(object sender, EventArgs e)
       {
           textBox1.AppendText(DateTime.Now.ToString());
       }

       //字型设置
       private void MenuItem30_Click(object sender, EventArgs e)
       {
           if (fontDialog1.ShowDialog() == DialogResult.OK)
           {
               textBox1.Font = fontDialog1.Font;
               textBox1.ForeColor = fontDialog1.Color;
           }
       }

       //显示帮助文件
       private void MenuItem32_Click(object sender, EventArgs e)
       {
           Help.ShowHelp(this, "notepad.chm");
       }

       //关于本记事本制作申明
       private void MenuItem33_Click(object sender, EventArgs e)
       {
           new About().Show();

       }

       //字体颜色设置
       private void MenuItem34_Click(object sender, EventArgs e)
       {
           if (colorDialog1.ShowDialog() == DialogResult.OK)
           {
               textBox1.ForeColor = colorDialog1.Color;
           }
       }

       //背景颜色设置
       private void MenuItem35_Click(object sender, EventArgs e)
       {
           if (colorDialog1.ShowDialog() == DialogResult.OK)
           {
               textBox1.BackColor = colorDialog1.Color;
           }
       }

       //上下文菜单－撤消
       private void toolStripMenuItem1_Click(object sender, EventArgse)
       {
           this.MenuItem15_Click(sender, e);
       }

       //上下文菜单－剪切
       private void toolStripMenuItem2_Click(object sender, EventArgse)
       {
           this.MenuItem17_Click(sender, e);
       }

       //上下问菜单－复制
       private void toolStripMenuItem3_Click(object sender, EventArgse)
       {
           this.MenuItem18_Click(sender, e);
       }

       //上下文菜单－粘贴
       private void toolStripMenuItem4_Click(object sender, EventArgse)
       {
           this.MenuItem19_Click(sender, e);
       }

       //上下文菜单－删除
       private void toolStripMenuItem5_Click(object sender, EventArgse)
       {
           this.MenuItem20_Click(sender, e);
       }

       //上下文菜单－全选
       private void toolStripMenuItem6_Click(object sender, EventArgse)
       {
           this.MenuItem27_Click(sender, e);
       }

       //编辑菜单项下拉事件发生时更新其菜单项属性
       private void MenuItem3_DropDownOpened(object sender, EventArgse)
       {
           //如果剪切板内容不为空，则粘贴项可用，否则不可用
           if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text))
           {
               this.MenuItem19.Enabled = true;
           }
           else
               this.MenuItem19.Enabled = false;

           //根据选择区域不为空，则复制，剪切，删除可用；否则不可用
           if (textBox1.SelectedText.Length > 0)
           {
               MenuItem17.Enabled = true;
               MenuItem18.Enabled = true;
               MenuItem20.Enabled = true;
           }
           else
           {
               MenuItem17.Enabled = false;
               MenuItem18.Enabled = false;
               MenuItem20.Enabled = false;
           }

           //设置撤消
           if (textBox1.CanUndo == true)
           {
               MenuItem15.Enabled = true;
           }
           else
           {
               MenuItem15.Enabled = false;
           }

           //如果记事本文本内容不为空，则全选可用；否则不可用
           if (textBox1.Text.Length > 0)
           {
               MenuItem27.Enabled = true;
           }
           else
           {
               MenuItem27.Enabled = false;
           }
       }

       //点击右键时设置上下文菜单属性
       private void contextMenuStrip1_Opening(object sender,CancelEventArgs e)
       {

           //如果剪切板内容不为空，则粘贴项可用，否则不可用
           if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text))
           {
               this.toolStripMenuItem4.Enabled = true;
           }
           else
               this.toolStripMenuItem4.Enabled = false;

           //根据选择区域不为空，则复制，剪切，删除可用；否则不可用
           if (textBox1.SelectedText.Length > 0)
           {
               toolStripMenuItem2.Enabled = true;
               toolStripMenuItem3.Enabled = true;
               toolStripMenuItem5.Enabled = true;
           }
           else
           {
               toolStripMenuItem2.Enabled = false;
               toolStripMenuItem3.Enabled = false;
               toolStripMenuItem5.Enabled = false;
           }

           //设置撤消
           if (textBox1.CanUndo == true)
           {
               toolStripMenuItem1.Enabled = true;
           }
           else
           {
               toolStripMenuItem1.Enabled = false;
           }

           //如果记事本文本内容不为空，则全选可用；否则不可用
           if (textBox1.Text.Length > 0)
           {
               toolStripMenuItem6.Enabled = true;
           }
           else
           {
               toolStripMenuItem6.Enabled = false;
           }
       }

       //关闭窗体前提示是否需要保存
       private void Form_Close(object sender,System.ComponentModel.CancelEventArgs err)
       {
           if (textBox1.Modified == true)
           {
               DialogResult re = MessageBox.Show(this.Text +"内容已更改，是否需要保存？", "保存提示",MessageBoxButtons.YesNoCancel, MessageBoxIcon.Asterisk);
               switch (re)
               {
                   case DialogResult.Yes: