完整的记事本

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 form1 : Form
    {
        public form1()
        {
            InitializeComponent();
        }

        private void 退出XToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();//关闭窗口！
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            string shu = textBox1.TextLength.ToString();//获取文件里的数据长度
            shuzi1.Text = shu;//输出数
        }

        private void 撤消UToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Undo();//撤销文本框中上一个编辑操作。
        }

        private void 剪切TToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Cut();//将文本框中选中的文本移动到剪贴板中
        }

        private void 复制CToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Copy();//将文本框中选中的文本复制到剪贴板中
        }

        private void 粘贴PToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Paste();//将剪贴板中的内容替换文本框中的选定内容
        }

        private void 全选AToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.SelectAll();//选中文本框中所有的内容
        }

        private void 清空ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Clear();//清空文本狂中所有的内容
        }

        private void 字体颜色ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DialogResult dr = colorDialog1.ShowDialog();//shoudialog 显示对话框
            if (dr == DialogResult.OK)
            {
                textBox1.ForeColor = colorDialog1.Color;
            }
        }

        private void 字体设计ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowColor = true;
            DialogResult cr = fontDialog1.ShowDialog();
            if (cr == DialogResult.OK)
            {
                textBox1.ForeColor = fontDialog1.Color;
                textBox1.Font = fontDialog1.Font;
            }
        }

        private void 选择文件夹ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.ShowDialog();
            textBox1.Text = folderBrowserDialog1.SelectedPath;//在文本框中显示文件的绝对路径
        }

        private void 打开OToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "文本文件|*.txt";//确定打开的文件类型。要是还要别的类型继续在引号里加|文本文件|*.*|     这是所有文件类型  *代表所有
            DialogResult dr = openFileDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                label1.Text = openFileDialog1.FileName;//用户选择的要打开文件的绝对路径

                StreamReader sr = new StreamReader(openFileDialog1.FileName);
                textBox1.Text= sr.ReadToEnd();
                sr.Close();//通道只有一个，必须关闭。@！！
            }
        }

        private void form1_Load(object sender, EventArgs e)
        {

        }

        string path = "";//定义全局保存路径为空
        private void 保存SToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (path == "")
            {
                saveFileDialog1.FileName = "新建文本文件.txt";//设置保存类型和保存名称
                saveFileDialog1.ShowDialog();
                path = saveFileDialog1.FileName;//用户选择的要保存的路径
            }
            StreamWriter sw = new StreamWriter(saveFileDialog1.FileName);
            sw.Write(textBox1.Text);
            sw.Close();
        }

        private void 打印设计ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            pageSetupDialog1.Document = printDocument1;//打印设置所要操作的对象就是PrintDocument1！
            pageSetupDialog1.ShowDialog();
        }

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)//类似于画板
        {
            Font f = new Font("宋体",14);//定义打印字体
            Brush b = new SolidBrush(Color.Black);//画刷对象 确定颜色
            PointF p = new PointF(10,10);//确定二维画面中的坐表。
            e.Graphics.DrawString(textBox1.Text, f, b, p);
        }

        private void 打印预览VToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //printPreviewControl1.Document = printDocument1;//你要展现的对象
            printPreviewDialog1.Document = printDocument1;
            printPreviewDialog1.ShowDialog();
        }

        private void printPreviewDialog1_Load(object sender, EventArgs e)
        {

        }

        private void 打印PToolStripMenuItem_Click(object sender, EventArgs e)
        {
            printDialog1.Document = printDocument1;
            printDialog1.ShowDialog();
        }

    }
}