namespace _18记事本应用程序
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e) { //加载程序的时候隐藏panel panel1.Visible = false; //取消文本框自动换行 textBox1.WordWrap = false; } private void button1_Click(object sender, EventArgs e) { //点击按钮时也将panel隐藏 panel1.Visible = false; } private void 显示ToolStripMenuItem_Click(object sender, EventArgs e) { //点击显示按钮时显示panel panel1.Visible = true; } private void 隐藏ToolStripMenuItem_Click(object sender, EventArgs e) { //点击隐藏按钮时隐藏panel panel1.Visible = false; } //获得打开文件的全路径 List<string> list = new List<string>(); private void 打开ToolStripMenuItem_Click(object sender, EventArgs e) { //打开对话框 OpenFileDialog ofd = new OpenFileDialog(); ofd.Title = "请选择要打开的文件"; ofd.InitialDirectory = @"C:\Users\Administrator.USER-20180925HC\Desktop\pic"; ofd.Multiselect = true; ofd.Filter = "文本文件|*.txt|所有文件|*.*"; //显示打开对话框 ofd.ShowDialog(); //将选中打开的txt文件展现在textBox中 //获得文件的全路径 string path = ofd.FileName; //添加全路径到list集合中 list.Add(path); //获得用户打开的文件名 string fileName = Path.GetFileName(path); //将文件名赋值给listBox listBox1.Items.Add(fileName); //判断路径是否为空 if (path == "") { return; } //如果路径不为空 using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read)) { //读到字节数组当中 byte[] buffer = new byte[1024 * 1024 * 5]; //调用读取的方法 int r = fsRead.Read(buffer, 0, buffer.Length); //开始解码，解码后赋值给textBox textBox1.Text = Encoding.Default.GetString(buffer,0, r); } } private void 保存ToolStripMenuItem_Click(object sender, EventArgs e) { //保存对话框 SaveFileDialog sfd = new SaveFileDialog(); sfd.Title = "请选择保存路径"; sfd.InitialDirectory = @"C:\Users\Administrator.USER-20180925HC\Desktop\pic"; sfd.Filter = "文本文件|*.txt|所有文件|*.*"; sfd.ShowDialog(); //获得文件要保存的路径 string path = sfd.FileName; //判断路径是否为空 if (path == "") { return; } //不为空则开始解码 using(FileStream fsWrite=new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write)) { byte[] buffer = Encoding.Default.GetBytes(textBox1.Text); fsWrite.Write(buffer, 0, buffer.Length); } MessageBox.Show("保存成功"); } private void 自动换行ToolStripMenuItem_Click(object sender, EventArgs e) { if (自动换行ToolStripMenuItem.Text == "自动换行") { textBox1.WordWrap = true; 自动换行ToolStripMenuItem.Text = "取消自动换行"; } else if(自动换行ToolStripMenuItem.Text=="取消自动换行") { textBox1.WordWrap = false; 自动换行ToolStripMenuItem.Text = "自动换行"; } } private void 字体ToolStripMenuItem_Click(object sender, EventArgs e) { FontDialog fd = new FontDialog(); fd.ShowDialog(); textBox1.Font = fd.Font; } private void 颜色ToolStripMenuItem_Click(object sender, EventArgs e) { ColorDialog cd = new ColorDialog(); cd.ShowDialog(); textBox1.ForeColor = cd.Color; } private void listBox1_SelectedIndexChanged(object sender, EventArgs e) { } private void listBox1_DoubleClick(object sender, EventArgs e) { //双击listBox文件列表文件名，则在textBox显示文件信息 //获得双击文件的全路径 string path = list[listBox1.SelectedIndex]; using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read)) { byte[] buffer = new byte[1024 * 1024 * 5]; int r = fsRead.Read(buffer, 0, buffer.Length); textBox1.Text = Encoding.Default.GetString(buffer, 0, r); } }}

}