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

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.UI;
 6 using System.Web.UI.WebControls;
 7 
 8 namespace FileUpload
 9 {
10     public partial class File : System.Web.UI.Page
11     {
12         protected void Page_Load(object sender, EventArgs e)
13         {
14             if (IsPostBack)
15             {
16                 HttpPostedFile hp = Request.Files["filename"];
17                 string filename = hp.FileName;
18                 string[] filenum = filename.Split('.');
19                 string[] newnum = filenum[0].Split(':');
20                 string[] newnums = newnum[newnum.Length - 1].Split('\');
21                 string filextention = filenum[filenum.Length - 1];
22 
23                 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;
24                 string path =Request.MapPath("/Files/") + newFilename;
25                 hp.SaveAs(path);
26                 
27             }
28         }
29     }
30 }