拷贝目录及目录下的文件

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;

public partial class DirCopy : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    { 
    }

    #region 拷贝目录及目录下的文件
    /// <summary>
    /// 拷贝目录及目录下的文件
    /// </summary>
    /// <param name="oldDir">原目录</param>
    /// <param name="newDir">目标目录</param>
    private void CopyDirectory(DirectoryInfo oldDir, DirectoryInfo newDir)
    {
        try
        {
            if (!oldDir.Exists)
            {
                Response.Write("目录不存在！");
                Response.End();
                return;
            }
            if (!newDir.Exists)
            {
                newDir.Create();
            }
           
            foreach (FileInfo fi in oldDir.GetFiles())
            {
                fi.CopyTo(newDir.FullName + @"\" + fi.Name, true);
            }
            foreach (DirectoryInfo dr in oldDir.GetDirectories())
            {
                CopyDirectory(dr, new DirectoryInfo(newDir.FullName + @"\" + dr.Name));
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message.ToString());
        }
    }
    #endregion

    protected void Button1_Click(object sender, EventArgs e)
    {
        DirectoryInfo oldDir = new DirectoryInfo(Server.MapPath("./aa"));
        DirectoryInfo newDir = new DirectoryInfo(Server.MapPath("./App_Data"));
        newDir.Delete(true);
        CopyDirectory(oldDir, newDir);
    }
}