C#的文件操作及中文乱码问题的解决

对C#读写文件网上的帖子泛滥成灾，百度一下就能轻松找到用C#对文件读写、打开、追加、打开、删除、移动、创建目录等操作。和Java一样，C#提供的类库能够轻松实现对文件的操作。

 

// C#写入/读出文本文件

   string  fileName  = @" c:I.txt " ;
  StreamReader sr  =   new  StreamReader(fileName);                                               string   str = sr.ReadLine  ();                                                                                                                                    sr.close();                                       

  StreamWriterrw = File.CreateText(Server.MapPath( " . " ) + " /myText.txt " );
 rw.WriteLine( " 写入 " );
 rw.WriteLine( " abc " );
 rw.WriteLine( " .NET笔记 " );
 rw.Flush();
 rw.Close();

  // 打开文本文件 
 StreamReadersr = File.OpenText(Server.MapPath( " . " ) + " /myText.txt " );
 StringBuilderoutput = newStringBuilder();
 stringrl;
  while ((rl = sr.ReadLine()) != null )
  ... {
  output.Append(rl+"");
 }

 lblFile.Text = output.ToString();
 sr.Close();


  // C#追加文件
 StreamWritersw = File.AppendText(Server.MapPath( " . " ) + " /myText.txt " );
 sw.WriteLine( " 追逐理想 " );
 sw.WriteLine( " kzlll " );
 sw.WriteLine( " .NET笔记 " );
 sw.Flush();
 sw.Close();

  // C#拷贝文件
 stringOrignFile,NewFile;
 OrignFile = Server.MapPath( " . " ) + " /myText.txt " ;
 NewFile = Server.MapPath( " . " ) + " /myTextCopy.txt " ;
 File.Copy(OrignFile,NewFile, true );

  // C#删除文件
 stringdelFile = Server.MapPath( " . " ) + " /myTextCopy.txt " ;
 File.Delete(delFile);

  // C#移动文件
 stringOrignFile,NewFile;
 OrignFile = Server.MapPath( " . " ) + " /myText.txt " ;
 NewFile = Server.MapPath( " . " ) + " /myTextCopy.txt " ;
 File.Move(OrignFile,NewFile);

  // C#创建目录
  // 创建目录c:sixAge
 DirectoryInfod = Directory.CreateDirectory( " c:/sixAge " );
  // d1指向c:sixAgesixAge1
 DirectoryInfod1 = d.CreateSubdirectory( " sixAge1 " );
  // d2指向c:sixAgesixAge1sixAge1_1
 DirectoryInfod2 = d1.CreateSubdirectory( " sixAge1_1 " );
  // 将当前目录设为c:sixAge
 Directory.SetCurrentDirectory( " c:/sixAge " );
  // 创建目录c:sixAgesixAge2
 Directory.CreateDirectory( " sixAge2 " );
  // 创建目录c:sixAgesixAge2sixAge2_1
 Directory.CreateDirectory( " sixAge2/sixAge2_1 " );

但是，在对txt文件读的操作中貌似没问题。因为代码能实现文件的读操作，但是所读txt文件包含中文的时候就以乱码显示。查了半天资料，看似复杂的问题其实很简单就能解决，稍微改动一下即可：StreamReader sr = new StreamReader(fileName,Encoding.GetEncoding("gb2312"));