C# 复杂点的文本框

   

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


        private void button1_Click(object sender, EventArgs e)
        {
            panel1.Visible = true;
        }


        private void button2_Click(object sender, EventArgs e)
        {
            panel1.Visible = false;
        }


        private void Form1_Load(object sender, EventArgs e)
        {
            panel1.Visible = false;
            // 取消自动换行
            textBox1.WordWrap = false;
        }


        private void 显示ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            panel1.Visible = true;
        }


        private void 隐藏ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            panel1.Visible = false;
        }


        private void button1_Click_1(object sender, EventArgs e)
        {
            panel1.Visible = true;
        }
        List<string >  lis=new List<string>();


        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog op = new OpenFileDialog();
            op.Title = "选择你要打开的文件";
            op.InitialDirectory = @"C:\Users\Administrator\Desktop";
            op.Filter = "文本文件|*.txt";
            op.Multiselect = true;
            op.ShowDialog();

            string na = op.FileName;  //获得文件的路径
            lis.Add (na);

            //获得文件名
            string path = Path.GetFileName(na);
            listBox1.Items.Add(path);
            if (na == "")
            {
                return;
            }
            using (FileStream rdfile = new FileStream(na, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] by = new byte[1024];
                int name = rdfile.Read(by, 0, by.Length);
                string str1 = Encoding.Default.GetString(by, 0, name);
                textBox1.Text = str1;
            }
        }


        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog sav = new SaveFileDialog();
            sav.Title = "保存到指定的文件夹中";
            sav.Filter = "所有的文件|*.*";
            sav.ShowDialog();

            string ps = sav.FileName; // 获得用户要保存的文件路径
            if (ps == "")
                return;
            using (FileStream fs = new FileStream(ps, FileMode.OpenOrCreate, FileAccess.Write))
            {
                string str2 = textBox1.Text;
                byte[] bb = Encoding.Default.GetBytes(str2);
                fs.Write(bb, 0, bb.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
            {
                textBox1.WordWrap = false;
                自动换行ToolStripMenuItem.Text = "自动换行";
            }
        }


        private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            FontDialog fon = new FontDialog();
            fon.ShowDialog();
            textBox1.Font = fon.Font;
        }


        private void 颜色ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ColorDialog col = new ColorDialog();
            col.ShowDialog();
            textBox1.ForeColor = col.Color;   // 选中的颜色进行复制
        }


        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            string paa=lis[listBox1 .SelectedIndex ];
            if(paa=="")
                return ;
            using (FileStream rdfile = new FileStream(paa, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] by = new byte[1024];
                int name = rdfile.Read(by, 0, by.Length);
                string str1 = Encoding.Default.GetString(by, 0, name);
                textBox1.Text = str1;
            }
        }
    }
}