input file 上传文件

html:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="UPFile.WebForm2" %>





    


    

    

        
        
    
    

C#:

 protected void Page_Load(object sender, EventArgs e)
        {
            if (Page.IsPostBack)
            {
                System.Web.HttpFileCollection files = Request.Files;
                for (int fileCount = 0; fileCount < files.Count; fileCount++)
                {
                    System.Web.HttpPostedFile postedfile = files[fileCount];

                    string fileName = System.IO.Path.GetFileName(postedfile.FileName);
                    if (!String.IsNullOrEmpty(fileName))
                    {

                        string fileExtension = System.IO.Path.GetExtension(fileName);    //获取文件类型

                        //上传目录
                        string directory = Server.MapPath("/UpLoadFiles/");
                        //文件全路径
                        string path = directory + fileName;

                        //判断目录是否存在
                        if (!Directory.Exists(directory))
                        {
                            Directory.CreateDirectory(directory);
                        }
                        //文件存在就删除文件
                        if (File.Exists(path))
                        {
                            File.Delete(path);
                        }
                        //上传到服务器的路径
                        postedfile.SaveAs(path);
                    }
                }
            }
            else
            {
                Response.Write("0");
            }
        }