在ASP.NET中实现多文件上传

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aspx文件：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="多文件上传.aspx.cs" Inherits="Image" %><!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>无标题页</title>     <script type="text/javascript">    function addFile()     {        today = new Date();        var _Date = today.getDate() + "a" + today.getHours() + "b" + today.getMinutes() + "c" + today.getSeconds();        var _DIV = today.getDate() + "c" + today.getHours() + "b" + today.getMinutes() + "a" + today.getSeconds();            var div = document.createElement("div");        div.setAttribute("id", _DIV)        var f = document.createElement("input");        f.setAttribute("type", "file")        f.setAttribute("name", "File")        f.setAttribute("size", "50")        div.appendChild(f)        var d = document.createElement("input");        d.setAttribute("type", "button")        d.setAttribute("id", _Date)        d.setAttribute("value", "移除")        div.appendChild(d)        document.getElementById("_container").appendChild(div);        test(_Date,_DIV);    }</script></head><body>     <form id="form1" runat="server" method="post" enctype="multipart/form-data"><h3>多文件上传</h3>   用户名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><div id="_container">    <input type="file" size="50" name="File" /></div><div>    <input type="button" value="添加文件(Add)" onclick="addFile()" /></div><div style="padding:10px 0">    <asp:Button runat="server" Text="开始上传" ID="UploadButton" onclick="UploadButton_Click"></asp:Button></div><div>    <asp:Label ID="strStatus" runat="server" Font-Names="宋体" Font-Bold="True" Font-Size="9pt" Width="500px" BorderStyle="None" BorderColor="White"></asp:Label></div></form><script type="text/javascript">    function test(_Date,_DIV)       {          document.getElementById(_Date).onclick = function()       {         var obj = document.getElementById(_DIV);        obj.parentNode.removeChild(obj);      }    }   </script></body></html>

CS文件：

using System;using System.Collections;using System.Configuration;using System.Data;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;public partial class Image : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {    }    protected void UploadButton_Click(object sender, EventArgs e)    {        ///'遍历File表单元素        HttpFileCollection files = HttpContext.Current.Request.Files;        /// '状态信息        System.Text.StringBuilder strMsg = new System.Text.StringBuilder("您输入的用户名是：" + TextBox1.Text + "<br/>");        strMsg.Append("上传的文件分别是：<hr color='red'/>");        try        {            for (int iFile = 0; iFile < files.Count; iFile++)            {                ///'检查文件扩展名字                HttpPostedFile postedFile = files[iFile];                string fileName, fileExtension;                fileName = System.IO.Path.GetFileName(postedFile.FileName);                if (fileName != "")                {                    fileExtension = System.IO.Path.GetExtension(fileName);                    strMsg.Append("上传的文件类型：" + postedFile.ContentType.ToString() + "<br>");                    strMsg.Append("客户端文件地址：" + postedFile.FileName + "<br>");                    strMsg.Append("上传文件的文件名：" + fileName + "<br>");                    strMsg.Append("上传文件的扩展名：" + fileExtension + "<br><hr>");                    ///'可根据扩展名字的不同保存到不同的文件夹                    ///注意：可能要修改你的文件夹的匿名写入权限。                    postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("Image/") + fileName);                }            }            strStatus.Text = strMsg.ToString();        }        catch (System.Exception Ex)        {            strStatus.Text = Ex.Message;        }    }}