记事本

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;

namespace notepad
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog();
            richTextBox1.Font = fontDialog1.Font;
        }

        private void 颜色ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog();
            richTextBox1.ForeColor = fontDialog1.Color;
        }

        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string path = "e:\text.txt";
            string content = richTextBox1.Text;
            if (string.IsNullOrEmpty(path) == true)
            {
                MessageBox.Show("文件路径不正确");
                return;
            }
            try
            {
                FileStream myfs = new FileStream(path, FileMode.Create);
                StreamWriter mysw = new StreamWriter(myfs);
                mysw.Write(content);
                mysw.Close();
                myfs.Close();
                MessageBox.Show("创建成功");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message .ToString ());
            }
        }

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] drivers = System.Environment.GetLogicalDrives();
            foreach (string driver in drivers )
            {
                NewMethod(driver);
            }
        }
        private static void NewMethod(string path)
        {
            string content;
            try
            {
                FileStream myfs = new FileStream(path, FileMode.Open);
                StreamReader mysr = new StreamReader(myfs);
                content = mysr.ReadToEnd();
                RichTextBox richtextbox = new RichTextBox();
                richtextbox.Text = content;
                mysr.Close();
                myfs.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message .ToString ());
            }
        }

        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string path = "e:\\text.txt";
            if (string.IsNullOrEmpty(path) == true)
            {
                MessageBox.Show("路径不正确");
            }
            File.Copy(path, "e:\\text.txt");
            MessageBox.Show("保存成功");
        }

        private void 另存为ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            saveFileDialog1.ShowDialog();
            string path = (string )saveFileDialog1.Tag;
            File.Copy("e:\\text.txt",path);
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void 日期ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.日期ToolStripMenuItem.Checked ==true )
            {
                this.dateTimePicker1.Show();
            }
        }

        private void 全选ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            bool c = false;
            if (全选ToolStripMenuItem.Checked ==true )
            {
                this.richTextBox1.SelectAll();
                全选ToolStripMenuItem.Checked  = c;
            }
        }

        public void 查找ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            find f = new find();
            string ss=richTextBox1.SelectedText.ToLower();
            f.ss = ss;
            f.Show();
           
        }

    }
}

 

查找

namespace notepad
{
   
    public partial class find : Form
    {
        public find()
        {
            InitializeComponent();
        }

        private void find_Load(object sender, EventArgs e)
        {      

           
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        public  string ss = "";
        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == null)
            {
                button1.Enabled = false;
            }
            else
            {
               
                button1.Enabled = true;
            }
            Form1 f = new Form1();
            if (checkBox1.Checked==false)
            {
                string s = textBox1.Text.Trim().ToLower();                
                if (f.Text.LastIndexOf(ss) > f.Text.IndexOf(ss))
                {
                    MessageBox.Show("exists");
               
                }
            }
        }

    }
}