多文件上传

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!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>
<title>attachme</title>
<meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
</HEAD>
<body >
<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: 44px; POSITION: absolute; TOP: 308px" runat="server" Height="20px" 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;
/// <summary>
/// attachme allows for multiple files to be uploaded to your web server while using only
/// one HttpInputFile control and a listbox.
/// </summary>
public partial class Default2 : 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;
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.AddFile.Click += new System.EventHandler(this.AddFile_Click);
this.RemvFile.Click += new System.EventHandler(this.RemvFile_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 = "D://";
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();
}

}

}