int j = 0; protected void Button1_Click(object sender, EventArgs e) { DirectoryInfo dir = new DirectoryInfo(TextBox1.Text.ToString()); Label1.Text = GetAllFiles(dir).ToString(); }GetAllFiles方法为自定义方法，实现遍历整个文件夹文件的方法。代码如下： public int GetAllFiles(DirectoryInfo dir) { FileSystemInfo[] fileinfo = dir.GetFileSystemInfos(); foreach (FileSystemInfo i in fileinfo) { if (i is DirectoryInfo) { GetAllFiles((DirectoryInfo)i); } else { j++; } } return j; } //================================================= string[] Directorys = System.IO.Directory.GetDirectories("D:\\","*"); for(int i=0; i <Directorys.Length; i ) { Response.Write(Directorys " <br/>"); } Response.Write("统计目录：" Directorys.Length "个 <br/>--------- <br>"); //================================================= string[] Files = System.IO.Directory.GetFiles("D:\\","*"); for(int i=0; i <Files.Length; i ) { Response.Write(Files " <br/>"); } Response.Write("统计文件：" Files.Length "个 <br/>--------- <br>");