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[0].Split(':');
                string[] newnums = newnum[newnum.Length - 1].Split('\');
                string filextention = filenum[filenum.Length - 1];

                string newFilename = newnums[newnums.Length - 1] + 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);
                
            }
        }
    }
}