ASP.NET文件的上传下载提交分页

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="DownLoadPage.aspx.cs" Inherits="WebApplication2.DownLoadPage" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <p>

    <a href="/IMBA_3.86b_ai.zip">下载压缩文件</a>
        <br />
    </p>
    <p>
        <asp:Button ID="Button1" runat="server" Text="下载" onclick="Button1_Click" />
    </p>
    <p>
    </p>
</asp:Content>

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

namespace WebApplication2
{
    public partial class DownLoadPage : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        //下载
        protected void Button1_Click(object sender, EventArgs e)
        {
            //用代码将文件发送给浏览器
            //可以先检测用户的权限或积分再做文件的发送.....
            //指定我接下来给你发送的是什么类型文件
            Response.ContentType = "application/zip";
            //指定头信息，告诉浏览器是一个附件
            Response.AddHeader("content-disposition","attchment;filename=aaa.zip");
            //1.一次将文件放到内存中,在发送的
            //Response.WriteFile("/IMBA_3.86b_ai.zip");
            //2.用流变读取文件边发送
            FileStream fs = new FileStream(Server.MapPath("/IMBA_3.86b_ai.zip"), FileMode.Open, FileAccess.Read, FileShare.Read);
            Stream st= Response.OutputStream;
            //将fs内容读取写入到st
            byte[] buffer = new byte[102400];
            while (true)
            {
                int len = fs.Read(buffer, 0, buffer.Length);
                if (len == 0) break;
                st.Write(buffer,0,len);
                Response.Flush();
            } fs.Close();
            Response.End();

        }
    }
}

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Goods.aspx.cs" Inherits="WebApplication2.Goods" %>
<%@ Register src="NotNullTextBox.ascx" tagname="NotNullTextBox" tagprefix="uc1" %>
<%@ Register assembly="ServerControl1" namespace="ServerControl1" tagprefix="cc1" %>
<%@ Register src="PageApart.ascx" tagname="PageApart" tagprefix="uc2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    这里放商品信息<br />
    用户名：<uc1:NotNullTextBox ID="NotNullTextBox1" runat="server" 
        ErrorMsg="用户名不能为空！！！" />
    <asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="提交" />
<br />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
<br />
<br />
<uc2:PageApart ID="PageApart1" runat="server" Fileds="*" Gv="" PageIndex="1" 
    PageSize="20" PrimaryKey="pid" Table="product" />
</asp:Content>

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

namespace WebApplication2
{
    public partial class Goods : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            
        }
        //提交
        protected void Button2_Click(object sender, EventArgs e)
        {
            //NotNullTextBox nb = new NotNullTextBox();
            //TextBox c = NotNullTextBox1.FindControl("TextBox1") as TextBox;//找到输入框
            //Response.Write(c.Text);


            string x = NotNullTextBox1.Text;
            Response.Write(x);//利用属性的封装
        }
    }
}

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="UpLoadPage.aspx.cs" Inherits="WebApplication2.UpLoadPage" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <p>
    <br />
    <asp:FileUpload ID="FileUpload1" runat="server" />
</p>
<p>
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="上传" />
</p>
<p>
</p>
</asp:Content>

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

namespace WebApplication2
{
    public partial class UpLoadPage : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        //上传
        protected void Button1_Click(object sender, EventArgs e)
        {
            //准备文件名
            string fileName = "UpLoad/";
            string type = Path.GetExtension(FileUpload1.FileName);
            fileName += DateTime.Now.Ticks + type;
            FileUpload1.SaveAs(Server.MapPath(fileName));
            //1.将上传文件缓存到内存，在将内存一次性放到磁盘(耗内存)
            FileUpload1.SaveAs(Server.MapPath(fileName));
            //2.用流的方式,边上传边接受,接受到的内容写入到磁盘文件中
            FileStream fs = new FileStream(Server.MapPath(fileName),FileMode.Create,FileAccess.Write,FileShare.Read);
            HttpPostedFile hpf = FileUpload1.PostedFile;
            Stream st = hpf.InputStream;//上传的文件的文件流
            //st  读，读取到的写入到fs里
            byte[] buffer = new byte[102400];
            while (true)
            {
                int len = st.Read(buffer,0,buffer.Length);
                if (len == 0) break;
                fs.Write(buffer,0,len);
            }
            st.Close();
            fs.Close();
            Response.Write("上传成功");
        }
    }
}