| OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "基本格式|*.txt;*.doc";
 ofd.RestoreDirectory = false;
 if (ofd.ShowDialog() == DialogResult.OK)
 {
 using (FileStream fs = new FileStream(ofd.FileName,FileMode.Open,FileAccess.Read))
 {
 StreamReader sr = new StreamReader(fs, Encoding.Default);
 textBox1.Text = sr.ReadToEnd();
 }
 
 }
 ———————————————打开代码—————————————————
 SaveFileDialog sfd = new SaveFileDialog();
 sfd.RestoreDirectory = false;
 sfd.Filter = "文本格式|*.txt";
 if (sfd.ShowDialog() == DialogResult.OK)
 {
 using (FileStream fs = new FileStream(sfd.FileName, FileMode.Create, FileAccess.Write))
 {
 StreamWriter sw = new StreamWriter(fs, Encoding.Default);
 sw.Write(textBox1.Text);
 sw.Flush();
 sw.Close();
 
 }
 }
 ———————————————保存代码—————————————————
 textBox1.Copy();
 textBox1.Cut();
 textBox1.Paste();
 等等很多,详细你可以自己去看看
 |