C#实现文件导入与导出

using System.IO;

            string path;//定义一个路径             OpenFileDialog ofd = new OpenFileDialog(); //定义一个打开文件对话框             ofd.ShowDialog(); //展示对话框             path = ofd.FileName;              try             {                 if (path != "")                 {                     FileStream fs1 = new FileStream(path, FileMode.Open);    //采用文件流的方式读取文件                     StreamReader SR = new StreamReader(fs1, Encoding.Default);  //读取文件                     string str = SR.ReadToEnd();                     char[] cf = { ' ', 't', 'n', ',' };      //可以这几种字符拆分字符串                     string[] str1 = str.Split(cf);      //拆分                     SR.Close();                     fs1.Close();   //关闭读取模式
                 }
            }catch{}

SaveFileDialog fs = new SaveFileDialog();             fs.Filter = "日志文件（*.txt)|*.txt";             if (fs.ShowDialog() == DialogResult.OK)             {                 if (fs.FileName != "")                 {                                          string path = fs.FileName;                     richTextBox1.SaveFile(fs.FileName, RichTextBoxStreamType.PlainText);//此处可替换为要到出文本                 }             }