asp.net多文件上传

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.aspx代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="multiUpload.aspx.cs" Inherits="upfiles_multiUpload" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title>    <script src="../JS/jquery-1.9.1.js" type="text/javascript"></script>    <script type ="text/javascript">        $(document).ready(function () {            $("#fup1").val("");            $("#img_upload").click(function () {                $("#fup1").click();            });            $("#fup1").change(function () {                $("#btn_addSession").click();            });        });        function datacheck() {            var _file = document.getElementById("fup1");            var _size = _file.files[0].size;            if (_size > 1000000) {                alert("文件大于1M,请重新选择!");                return false;            }            var _count = $("#txt_FilesCount").val();            if (_count >= 10) {                alert("队列已满,完成上传后再次选择!");                return false;            }            return true;        }    </script></head><body>    <form id="form1" runat="server">    <div>        <h2>多文件上传</h2>        <img src="../imgs/upload.png" width="32" alt="" id="img_upload" />        <div id="div_hidden" style ="display:none;">            <asp:FileUpload ID="fup1" runat="server" />            <asp:Button ID="btn_addSession" runat="server" Text="Button"             OnClientClick="return datacheck()" onclick="btn_addSession_Click" />            <asp:TextBox ID="txt_FilesCount" runat="server" />        </div>        <iframe id="ifm_1" src="i_mup_sessionList.aspx" width="100%"        frameborder="0" ></iframe>    </div>    </form></body></html>

.aspx.cs代码如下：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class upfiles_multiUpload : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {    }    protected void btn_addSession_Click(object sender, EventArgs e)    {        for (int i = 0; i < 10; i++) {            if (((HttpPostedFile[])Session["postedFiles"])[i] == null) {                ((HttpPostedFile[])Session["postedFiles"])[i] = fup1.PostedFile;                break;            }        }        Response.Redirect(Request.RawUrl);    }}

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