引用：using System.IO;

调用： string testDir = @”D:\CreatPanoOS\uploads\panos\2017″;
listFiles(testDir, 0);

public void listFiles(string dir, int level)
{
try
{
//获取文件列表
string[] files = Directory.GetFiles(dir);

String preStr = “”;
for (int i = 0; i < level; i++)
{
preStr += “&nbsp;&nbsp;&nbsp;”;
}

foreach (string f in files)
{
if (f.LastIndexOf(“\\”) == -1)
{
Response.Write(preStr + f.Substring(f.LastIndexOf(“/”) + 1) + “<br />”);
}
else
{
Response.Write(preStr + f.Substring(f.LastIndexOf(“\\”) + 1) + “<br />”);
}
}

//获取目录列表
string[] dirs = Directory.GetDirectories(dir);
foreach (string d in dirs)
{
if (d.LastIndexOf(“\\”) == -1)
{
Response.Write(preStr + d.Substring(d.LastIndexOf(“/”) + 1) + “<br />”);
}
else
{
Response.Write(preStr + d.Substring(d.LastIndexOf(“\\”) + 1) + “<br />”);
}
if (Directory.Exists(d))
{
listFiles(d, level + 1);
}
}
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}