C#简易记事本

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//简单版记事本，功能尚不完善，bug也有很多，继续完善中...using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO;namespace 记事本{    public partial class Main : Form    {        public Main()        {            InitializeComponent();        }        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)//新建文件        {            if (textBox1.Text.Length != 0)//判断文本框有无内容            {                DialogResult result = MessageBox.Show("是否将更改保存?", "记事本",MessageBoxButtons.OKCancel,                    MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);                if (result == DialogResult.Cancel)//选择不保存                {                    textBox1.Text="";                }                else//选择保存                {                    this.saveFileDialog1.Filter = "*.txt|*.txt";                    this.saveFileDialog1.ShowDialog();                    string file = this.saveFileDialog1.FileName;                    if (string.IsNullOrEmpty(file)) return;                    //以下为写字符到文本文件，需要添加System.IO引用                    //创建一个文件流                    FileStream fs = new FileStream(file, FileMode.OpenOrCreate,                        FileAccess.Write);                    //创建一个StreamWriter对象                    StreamWriter sw = new StreamWriter(fs);                    sw.Write(this.textBox1.Text);                    //释放StreamWriter对象,文件流对象                    sw.Dispose();                    fs.Dispose();                    textBox1.Clear();                }            }        }        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)//打开操作        {            this.openFileDialog1.Filter = "*.txt|*.txt";            this.openFileDialog1.ShowDialog();            string file = this.openFileDialog1.FileName;            if (string.IsNullOrEmpty(file)) return;            //以下为写字符到文本文件，需要添加System.IO引用            //创建一个文件流            FileStream fs = new FileStream(file, FileMode.Open,                FileAccess.Read);            //创建一个StreamWriter对象            StreamReader sr = new StreamReader(fs);            this.textBox1.Text = sr.ReadToEnd();            //释放StreamWriter对象,文件流对象            sr.Dispose();            fs.Dispose();        }        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)//保存操作        {            if (textBox1.Text.Length != 0)//判断文本框内有无内容            {                this.saveFileDialog1.Filter = "*.txt|*.txt";                this.saveFileDialog1.ShowDialog();                string file = this.saveFileDialog1.FileName;                if (string.IsNullOrEmpty(file)) return;                //以下为写字符到文本文件，需要添加System.IO引用                //创建一个文件流                FileStream fs = new FileStream(file, FileMode.OpenOrCreate,                    FileAccess.Write);                //创建一个StreamWriter对象                StreamWriter sw = new StreamWriter(fs);                sw.Write(this.textBox1.Text);                //释放StreamWriter对象,文件流对象                sw.Dispose();                fs.Dispose();            }        }        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)        {            if (textBox1.Text.Length != 0)            {                DialogResult result = MessageBox.Show("是否将更改保存?", "记事本",MessageBoxButtons.OKCancel,                    MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);                if (result == DialogResult.Cancel)//选择不保存                {                    Application.Exit();                }                else//选择保存                {                    this.openFileDialog1.Filter = "*.txt|*.txt";                    this.openFileDialog1.ShowDialog();                    string file = this.openFileDialog1.FileName;                    if (string.IsNullOrEmpty(file)) return;                    FileStream fs = new FileStream(file, FileMode.Open,                        FileAccess.Read);                    //创建一个StreamWriter对象                    StreamReader sr = new StreamReader(fs);                    this.textBox1.Text = sr.ReadToEnd();                    //释放StreamWriter对象,文件流对象                    sr.Dispose();                    fs.Dispose();                }            }            else            {                Application.Exit();            }        }        private void textBox1_TextChanged(object sender, EventArgs e)//初始时有一些按钮不能使用        {                                                            //当文本框有内容时改变状态            保存ToolStripMenuItem.Enabled = true;            复制ToolStripMenuItem.Enabled = true;            剪切ToolStripMenuItem.Enabled = true;            删除ToolStripMenuItem.Enabled = true;            撤销ToolStripMenuItem.Enabled = true;        }        private void textBox1_KeyDown(object sender, KeyEventArgs e)        {            if (e.KeyCode==Keys.A&&e.Control)//键盘控制全选            {                textBox1.SelectAll();            }            if (e.KeyCode==Keys.F5)            {//事件注册                textBox1.KeyDown += new KeyEventHandler(时间ToolStripMenuItem_Click);            }        }        private void 全选CtrlAToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.SelectAll();        }        private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.Paste();        }        private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.Copy();        }        private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.Cut();        }        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.Cut();        }        private void 查找ToolStripMenuItem_Click(object sender, EventArgs e)        {            Find f = new Find();            f.Show();        }        private void 替换CToolStripMenuItem_Click(object sender, EventArgs e)        {            Exchange ee = new Exchange();            ee.Show();        }        private void 自动换行ToolStripMenuItem_Click(object sender, EventArgs e)        {            textBox1.WordWrap = false;        }        private void 时间ToolStripMenuItem_Click(object sender, EventArgs e)        {            string words = textBox1.Text;            textBox1.Text = DateTime.Now.ToString() + "\r\n";            textBox1.Text += words;        }        private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)        {            fontDialog1.ShowColor = true;            fontDialog1.ShowApply = true;            fontDialog1.ShowDialog();            textBox1.Font = fontDialog1.Font;            textBox1.ForeColor = fontDialog1.Color;        }        private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)        {            MessageBox.Show("制作人：田成琳           时间：2014.11.13");        }        private void 查看帮助ToolStripMenuItem_Click(object sender, EventArgs e)        {            MessageBox.Show("功能完善中，目标尽量与记事本功能基本相同。");        }    }}
运行结果：
心得体会：查找和替换功能没有实现，复制、剪切、删除、粘贴那块偷懒了(*^__^*) ……
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