form1.cs

这是.net2005学习不可缺少的教程

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

        private bool dirty = false;
        private string filepath = "";

        private void MySaving()
        {
            if (dirty)
            {
                if (MessageBox.Show("需要保存文件吗？", "提示框", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                    {
                        dirty = false;
                        if (filepath.Length == 0)
                        {
                            filepath = saveFileDialog1.FileName;
                        }
                        StreamWriter sTmp = new StreamWriter(filepath);
                        sTmp.Write(richTextBox1.Text);
                        sTmp.Flush();
                        sTmp.Close();
                    }
                }
            }
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MySaving();
            dirty = false;
            richTextBox1.Text = "";
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MySaving();
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                dirty = false;
                StreamReader sTmp = new StreamReader(openFileDialog1.FileName, System.Text.Encoding.ASCII);
                filepath = openFileDialog1.FileName;
                richTextBox1.Text = "";
                richTextBox1.Text = sTmp.ReadToEnd();
            }
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MySaving();
        }

        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MySaving();
        }

        private void wordwrapToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (richTextBox1.WordWrap == true)
            {
                richTextBox1.WordWrap = false;
                wordwrapToolStripMenuItem.Checked = false;
            }
            else
            {
                richTextBox1.WordWrap = true;
                wordwrapToolStripMenuItem.Checked = true;
            }
        }

        private void fontToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (fontDialog1.ShowDialog() == DialogResult.OK)
            {
                richTextBox1.Font = fontDialog1.Font;
            }
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MessageBox.Show("记事本实例 1.0版", "关于记事本");
        }

        private void richTextBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            dirty = true;
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            MySaving();
            if (dirty == false)
                Close();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            MySaving();
            if (dirty == false)
                e.Cancel = false;
        }

        
    }
}