Asp.net百例学习笔记(1)

1.驱动器列表显示:  //调用Directory的静态方法GetLogicalDrives
String[] myDirve=Directory.GetLogicalDrives;

2.目录和文件列表显示: 
Directory myDir=new Directory();
Directory[] subDir=myDir.GetDirectories();
File[] thisFile=myDir.GetFiles();

3./// <summary>
  /// 用于预览一个文本文件的前255个字符
  /// </summary>
  public static string PreviewFile(string funPath)
  {
   StreamReader myRd=File.OpenText(funPath);
   char[] charBuffer=new char[255];
   int iRead=myRd.ReadBlock(charBuffer,0,255);
   return (new string(charBuffer,0,iRead));
  }

4./// <summary>
  /// 返回目录列表的Html格式字符串,用于在Htlm中显示目录列表
  /// </summary>
  public static string GetSubDirList(string strPath,int iLevel)
  {
   string strDirList_out="<pre>";
   string[] strDirs=Directory.GetDirectories(strPath);
   for(int i=0;i<strDirs.Length;i++)
   {
    strDirList_out+=new string(' ',iLevel*2);
    strDirList_out+=" |__";
    strDirList_out+=strDirs[i]+"/r/n";
    strDirList_out+=GetSubDirList(strDirs[i],iLevel+1);
   }
   strDirList_out+="</pre>";
   return strDirList_out;
  }