C#资料操作

C#文件操作

  using   System;     using   System.IO;         class   Test       {             public   static   void   Main()               {                     string   path   =   @"c:\temp\MyTest.txt";                     string   path2   =   path   +   "temp";                         try                       {                             //   Create   the   file   and   clean   up   handles.                             using   (FileStream   fs   =   File.Create(path))   {}   ///创建文件                                                        File.Delete(path2);    ////删除文件                              //   Copy   the   file.                             File.Copy(path,   path2);   ////复制文件                          Console.WriteLine("{0}   copied   to   {1}",   path,   path2);                                 //   Try   to   copy   the   same   file   again,   which   should   succeed.                             File.Copy(path,   path2,   true);                             Console.WriteLine("The   second   Copy   operation   succeeded,   which   was   expected.");                     }                           catch                       {                             Console.WriteLine("Double   copy   is   not   allowed,   which   was   not   expected.");                     }             }  ////////////////////// private void btncopy_Click(object sender, EventArgs e)        {            openfile.FileName = null;            //显示打开文件对话框            if (openfile.ShowDialog() == DialogResult.OK)            {                //获取目标文件                string firstpath = openfile.FileName;                savefile.FileName = "";                //显示保存文件对话框                if (savefile.ShowDialog() == DialogResult.OK)                {                    //获取新文件路径                    string newpath = savefile.FileName;                    if (File.Exists(newpath))                        File.Delete(newpath);                    //拷贝文件                    File.Copy(firstpath, newpath, true);                    MessageBox.Show("复制成功！");                }            }