Asp.net最基本的文件上传功能代码

aspx前台页面代码

    <form id="form1" action="File.aspx" runat="server" enctype="multipart/form-data">
    <div>
    <input type="file" id="filename" name="filename" value="" /><input type="submit" value="上传" />
    </div>
    </form

后台页面代码

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;

 namespace FileUpload
 {
     public partial class File : System.Web.UI.Page
     {
         protected void Page_Load(object sender, EventArgs e)
         {
             if (IsPostBack)
             {
                 HttpPostedFile hp = Request.Files["filename"];
                 string filename = hp.FileName;
                 string[] filenum = filename.Split('.');
                 string[] newnum = filenum[].Split(':');
                 string[] newnums = newnum[newnum.Length - ].Split('\\');
                 string filextention = filenum[filenum.Length - ];

                 string newFilename = newnums[newnums.Length - ] + DateTime.Now.Year + DateTime.Now.Month.ToString() + DateTime.Now.Day + DateTime.Now.Hour + DateTime.Now.Minute + DateTime.Now.Second + "." + filextention;
                 string path =Request.MapPath("/Files/") + newFilename;
                 hp.SaveAs(path);

             }
         }
     }
 }