下面是一个完整的asp.net同时支持多图片上传一个实现，有需要的朋友可参考一下，本文章限制同时可上传8张图片，当然大可自己可修改更多或更少。
前台代码如下：
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<% @ Page Language="C#" CodeFile="UploadImg.aspx.cs" Inherits="NetAdmin_APicture_UploadImg" %>
<!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">
var i=1
function addFile()
{
if (i<8)
{var str = '<BR> <input type="file" name="File" runat="server" style="width: 300px"/>描述:<input name="text" type="text" style="width: 150px" maxlength="20" />'
document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
}
else
{
alert("您一次最多只能上传8张图片!")
}
i++
}
</script>
<link href="http://www.hzhuti.com/" rel="stylesheet" type="text/css" />
</head>
<body style="background-image: url(../images/bg.jpg); text-align: center">
<form id="form1" runat="server">
<div>
<table id="Table1" align="center" border="0" cellpadding="1" cellspacing="1" class="table"
style="height: 58px" width="620">
<tr>
<td align="center" background="../images/topbg1.jpg">
<font color="#0000ff" face="宋体" size="3"><strong>上传图片</strong></font></td>
</tr>
<tr>
<td align="center">
</td>
</tr>
<tr>
<td align="center">
<asp:Panel ID="Panel5" runat="server" Width="608px">
<table width="100%">
<tr>
<td align="right" style="width: 100px">
</td>
<td align="left">
说明:点增加图片按钮可一次上传多张图片,可为每张图片写上一句不超过20个字的描述.单张图片大小不大于1024k</td>
</tr>
<tr>
<td align="right" style="width: 100px">
请选择图片:<br />
</td>
<td align="left"><P id="MyFile"><INPUT onclick="addFile()" type="button" value="增加图片(Add)"><br />
<input type="file" name="File" runat="server" style="width: 300px"/>
描述:<input name="text" type="text" style="width: 150px" maxlength="20" />
</td>
</tr>
<tr>
<td align="right" style="width: 100px">
上传到的图库:</td>
<td align="left">
<asp:DropDownList ID="ddlAlbum" runat="server" DataSourceID="SqlDataSource1"
DataTextField="AlbumName" DataValueField="AlbumID">
</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:WebJakeCS %>"
SelectCommand="SELECT [AlbumID], [AlbumName] FROM [WB_Album] ORDER BY [AlbumID] DESC">
</asp:SqlDataSource>
</td>
</tr>
<tr>
<td align="right" style="width: 100px">
</td>
<td align="left">
<asp:Button ID="btnUpload" runat="server" Text="开始上传" OnClick="btnUpload_Click" />
</td>
</tr>
<tr>
<td align="right" style="width: 100px">
</td>
<td align="left">
<asp:Label ID="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label></td>
</tr>
</table>
</asp:Panel>
</td>
</tr>
<tr>
<td align="center">
<font face="宋体"></font><font face="宋体"> </font>
</td>
</tr>
<tr>
<td align="center">
<font face="宋体"></font>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
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后台代码如下：
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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
public partial class NetAdmin_APicture_UploadImg : System.Web.UI.Page
...{
protected void Page_Load(object sender, EventArgs e)
...{
}
protected void btnUpload_Click(object sender, EventArgs e)
...{
lblMes
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