如何实现多文件上传
我这里只能实现一个，我想知道如何添加新加入按钮的文件信息
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Web.UI.HtmlControls;

namespace 文件的上传与管理
{
    public partial class FileUp : System.Web.UI.Page
    {
        CommonClass cc = new CommonClass();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                SaveFUC();
            }

        }
        protected void SaveFUC()//保存当前页面上传文件控件集到缓存中
        {
            ArrayList AL = new ArrayList();//创建动态数组
            foreach (Control C in tabFU.Controls)
            {
                if (C.GetType().ToString() == "System.Web.UI.HtmlControls.HtmlTableRow")
                {
                    HtmlTableCell HTC = (HtmlTableCell)C.Controls[0];
                    foreach (Control FUC in HTC.Controls)
                    {  
                        //判断是否为上传控件（Fileuplode）如果是添加到ArrayList中
                        if (FUC.GetType().ToString() == "System.Web.UI.WebControls.FileUpload")
                        {
                            FileUpload FU = (FileUpload)FUC;
                            AL.Add(FU);

                        
                        }
                    }