FileUpLoad上传文件--[Asp.Net]

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

namespace WebApplication1
{
    public partial class import : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            //获取已经上传文件的名字
            string name = FileUpload1.FileName;
            //获取已上传文件的大小
            string size = FileUpload1.PostedFile.ContentLength.ToString();
            //获取已经上传文件的MIME内容类型
            string type = FileUpload1.PostedFile.ContentType;
            //得到文件的后缀名
            string type2 = name.Substring(name.LastIndexOf (".") + 1);
            //获得文件上传的实际路径
            string ipath = Server.MapPath("~/App_Data/") + "\\" + name;
            //获得文件上传的实际路径
            string fpath = Server.MapPath("~/App_Data/") + "\\" + name;//-----------修改的地方，原来的是用的"upfile"  "upimg"获取不到
            //写入到数据库的虚拟路径
            string wpath = "upimg\\" + name;

            //判断文件的格式
            if (type2 == "jpg" || type2 == "gif" || type2 == "bmp" || type2 == "png")
            {
                //将文件保存到该路径
                FileUpload1.SaveAs(ipath);
                //让图片显示出来
                Image1.ImageUrl = wpath;
                Label1.Text = "你传的文件名称是：" + name + "<br>文件大小为：" + size + "字节<br>文件类型是：" + type + "<br>后缀名是:" + type2 + "<br>实际路径是：" + ipath + "<br>虚拟路径是：" + wpath;
            }
            else
            {
                //将图片隐藏
                Image1.Visible = false;
                FileUpload1.SaveAs(fpath);
                Label1.Text = "你传的文件名称是：" + name + "<br>文件大小为：" + size + "字节<br>文件类型是：" + type + "<br>后缀名是:" + type2 + "<br>实际路径是：" + ipath + "<br>虚拟路径是：" + wpath;
            }


        }


       
    }
}