其实方法挺多的，比如用collection,arrarlist来收集要上传的文件集合，之后逐一遍历，下面使用arraylist
StyleSheet.css
.bluebutton
{
background-color:LightSteelBlue;
border-style:solid;
border-width: 1px;
border-color: LightSkyBlue;
}
attachme.aspx
<%@ Page language="c#" Codebehind="attachme.aspx.cs" AutoEventWireup="false"
Inherits="webchange.attachme" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>attachme</title>
<meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
<LINK href="StyleSheet.css" rel="stylesheet">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="attachme" method="post" encType="multipart/form-data" runat="server">
<INPUT class="bluebutton" id="FindFile" style="Z-INDEX: 101; LEFT: 36px;
WIDTH: 274px; POSITION: absolute; TOP: 123px; HEIGHT: 22px"
type="file" size="26" runat="server" NAME="FindFile">
<asp:listbox id="ListBox1" style="Z-INDEX: 102; LEFT: 36px;
POSITION: absolute; TOP: 149px" runat="server" CssClass="txtbox"
Height="100px" Width="274px" Font-Size="XX-Small"></asp:listbox>
<asp:button id="AddFile" style="Z-INDEX: 103; LEFT: 34px; POSITION: absolute;
TOP: 254px" runat="server" CssClass="bluebutton" Height="23px"
Width="72px" Text="Add"></asp:button>
<asp:button id="RemvFile" style="Z-INDEX: 104; LEFT: 119px;
POSITION: absolute; TOP: 255px" runat="server"
CssClass="bluebutton"
Height="23px" Width="72px" Text="Remove"></asp:button>
<INPUT class="bluebutton" id="Upload" style="Z-INDEX: 105; LEFT: 236px;
WIDTH: 71px; POSITION: absolute; TOP: 254px; HEIGHT: 24px"
type="submit" value="Upload" runat="server"
onserverclick="Upload_ServerClick" NAME="Upload">
</form>
<asp:label id="Label1" style="Z-INDEX: 106; LEFT: 46px; POSITION: absolute;
TOP: 326px" runat="server" Height="25px"
Width="249px"></asp:label>
</body>
</HTML>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
namespace webchange
{
/// <summary>
/// attachme allows for multiple files to be uploaded to your web server while using
/// only one HttpInputFile control and a listbox.
/// </summary>
public class attachme : System.Web.UI.Page
{
protected System.Web.UI.WebControls.ListBox ListBox1;
protected System.Web.UI.WebControls.Button AddFile;
protected System.Web.UI.WebControls.Button RemvFile;
protected System.Web.UI.HtmlControls.HtmlInputFile FindFile;
protected System.Web.UI.HtmlControls.HtmlInputButton Upload;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.HtmlControls.HtmlGenericControl txtOutput;
public ArrayList files = new ArrayList();
static public ArrayList hif = new ArrayList();
public int filesUploaded = 0;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.RemvFile.Click += new System.EventHandler(this.RemvFile_Click);
this.AddFile.Click += new System.EventHandler(this.AddFile_Click);
this.Upload.ServerClick += new System.EventHandler(this.Upload_ServerClick);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
/// <summary>
/// AddFile will add the path of the client side file that is currently in the
/// PostedFile
/// property of the HttpInputFile control to the listbox.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AddFile_Click(object sender, System.EventArgs e)
{
if (Page.IsPostBack == true)
{
hif.Add(FindFile);
ListBox1.Items.Add(FindFile.PostedFile.FileName);
}
else
{
}
}
/// <summary>
/// RemvFile will remove the currently selected file from the listbox.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RemvFile_Click(object sender, System.EventArgs e)
{
if(ListBox1.Items.Count != 0)
{
hif.RemoveAt(ListBox1.SelectedIndex);
ListBox1.Items.Remove(ListBox1.SelectedItem.Text);
}
}
/// <summary>
/// Upload_ServerClick is the server side script that will upload the files to
/// the web server
/// by looping through the files in the listbox.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void Upload_ServerClick(object sender, System.EventArgs e)
{
string baseLocation = "C:\\temp\\";
string status = "";
if((ListBox1.Items.Count == 0) && (filesUploaded == 0))
{
Label1.Text = "Error - a file name must be specified.";
return;
}
else
{
foreach(System.Web.UI.HtmlControls.HtmlInputFile HIF in hif)
{
try
{
string fn = System.IO.Path.GetFileName(HIF.PostedFile.FileName);
HIF.PostedFile.SaveAs(baseLocation + fn);
filesUploaded++;
status += fn + "<br>";
}
catch(Exception err)
{
Label1.Text = "Error saving file " + baseLocation
+ "<br>" + err.ToString();
}
}
if(filesUploaded == hif.Count)
{
Label1.Text = "These " + filesUploaded + " file(s) were "
+ "uploaded:<br>" + status;
}
hif.Clear();
ListBox1.Items.Clear();
}
}
}
}
