C# 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;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        string filename;
        public Form1()
        {
            InitializeComponent();
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            about a = new about();
            a.Show();
        }

        private void 状态栏ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            状态栏ToolStripMenuItem.Checked = !状态栏ToolStripMenuItem.Checked;
            statusStrip1.Visible = 状态栏ToolStripMenuItem.Checked;
        }

        private void fontToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FontDialog f = new FontDialog();
            if (f.ShowDialog() == DialogResult.Cancel) return;
            textBox1.Font = f.Font;
        }

        private void worarapToolStripMenuItem_Click(object sender, EventArgs e)
        {
            worarapToolStripMenuItem.Checked = !worarapToolStripMenuItem.Checked;
            statusStrip1.Visible =! worarapToolStripMenuItem.Checked;
            if (worarapToolStripMenuItem.Checked)
            {
                状态栏ToolStripMenuItem.Enabled = false;
                状态栏ToolStripMenuItem.Checked = false;
                textBox1.WordWrap = true;
            }
            else
            {
                状态栏ToolStripMenuItem.Enabled = true;
                textBox1.WordWrap = false;
            }
        }

        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Copy();
        }

        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Paste();
        }

        private void selectAllToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.textBox1.SelectAll();
        }

        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Cut();
        }

        private void findToolStripMenuItem_Click(object sender, EventArgs e)
        {
            find fd = new find();
            fd.Init(Search);
            fd.Show(this);
        }

        private int pos;

        private void Search(string s)
        {
          
            int i = textBox1.Text.IndexOf(s,pos);
            pos = i + 1;
            if (pos <s.Length)
            {
                MessageBox.Show("已经查找完毕");
            }
            if (i >=0)
            {
                textBox1.SelectionLength = s.Length;
                textBox1.SelectionStart = i;
                textBox1.Focus();
            }
          
         
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            pos = 0;
        }

        private void saveToSToolStripMenuItem_Click(object sender, EventArgs e)
        {

            SaveFileDialog s = new SaveFileDialog();
            s.Filter = "*.txt|*.txt";
            filename = s.FileName;
            if (s.ShowDialog() == DialogResult.Cancel) return;
            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(filename,false,Encoding .GetEncoding ("gb2132")))
            {
                sw.Write(textBox1.Text);
                sw.Close();
            }
        }

        private void saveSToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (filename == null || filename == "")
            {
                SaveFileDialog s = new SaveFileDialog();
                s.Filter = "*.txt|*.txt";
                if (s.ShowDialog() == DialogResult.Cancel) return;
                filename = s.FileName;
                this.Text = filename + "--记事本";

                using (System.IO.StreamWriter sw = new System.IO.StreamWriter(filename, false, Encoding.GetEncoding("gb2312")))
                {
                    sw.Write(textBox1.Text);
                    sw.Close();
                }
                textBox1.Modified = false;
            }
        }

        private void openOToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text != "" && textBox1.Modified)
            {
                DialogResult dr = MessageBox.Show("文本内容已经改变，是否保存？", "提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                switch (dr)
                {
                    case DialogResult.Yes:
                        saveSToolStripMenuItem_Click(sender, e);
                        break;
                    case DialogResult.No:
                        textBox1.Clear();
                        break;
                    case DialogResult.Cancel:
                        return;
                }

            }
            OpenFileDialog o = new OpenFileDialog();
                o.Filter = "*.txt|*.txt";
                if (o.ShowDialog() == DialogResult.Cancel) return;
                filename = o.FileName;
                this.Text = filename + "--记事本";
                using (System.IO.StreamReader sr = new System.IO.StreamReader(filename, Encoding.GetEncoding("gb2312")))
                {
                    textBox1.Text = sr.ReadToEnd();
                    sr.Close();
                }
        }

        private void createCToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Modified && textBox1.Text != "")
            {
                DialogResult dr = MessageBox.Show("文本内容已经改变，是否保存？", "提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                switch (dr)
                {
                    case DialogResult.Yes:
                        saveSToolStripMenuItem_Click(sender, e);
                        this.textBox1.Clear();
                        this.Text = "新建--记事本";
                        break;
                    case DialogResult.No:
                        textBox1.Clear();
                        this.Text = "新建--记事本";
                        break;
                    case DialogResult.Cancel:
                        return;
                }
            }
            else
            {
                textBox1.Clear();
                this.Text = "新建--记事本";
            }
        }

        private void exitEToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Modified && textBox1.Text != "")
            {
                DialogResult dr = MessageBox.Show("文本内容已经改变，是否保存？", "提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                switch (dr)
                {
                    case DialogResult.Yes:
                        saveSToolStripMenuItem_Click(sender, e);
                        this.Close();
                        break;
                    case DialogResult.No:
                        this.Close();
                        break;
                    case DialogResult.Cancel:
                        return;
                }
            }
            else 
                this.Close();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (textBox1.Modified)
            {
                DialogResult dr = MessageBox.Show("文本内容已经改变，是否保存？", "提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                switch (dr)
                {
                    case DialogResult.Yes:
                        saveSToolStripMenuItem_Click(sender, e);
                        break;
                    case DialogResult.No:
                        break;
                    case DialogResult.Cancel:
                        return;
                }
            }
        }

        private void replaceToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DateTime dt = DateTime.Now;
            this.textBox1.SelectedText = dt.ToString();
        }
    }
}

 

 

在find.cs中的代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication1
{
    public delegate void SrhText(string s);
    public partial class find : Form
    {
        SrhText st;
        public find()
        {
            InitializeComponent();
        }

        public  void Init(SrhText s)
        {
            st = s;
        }

     

        private void button1_Click(object sender, EventArgs e)
        {
            if (st != null)
                st(textBox1.Text);
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            button1.Enabled = true;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Dispose();
        }
    }
}