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 " ));

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