---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="UploadFile.Attachme" %>
<HTML>
<HEAD>
<title>多文件上传</title>
<LINK href="StyleSheet.css" rel="stylesheet">
</HEAD>
<body>
<form id="attachme" method="post" encType="multipart/form-data" runat="server">
<INPUT class="bluebutton" id="FindFile" type="file" size="26" runat="server" NAME="FindFile">
<BR>
<asp:listbox id="FileList" runat="server" CssClass="txtbox" Height="100px" Width="274px" SelectionMode="Multiple"></asp:listbox><BR>
<asp:button id="AddFile" runat="server" CssClass="bluebutton" Height="23px" Width="72px" Text="添加文件"></asp:button>
<asp:button id="RemvFile" runat="server" CssClass="bluebutton" Height="23px" Width="72px" Text="删除文件"></asp:button>
<INPUT class="bluebutton" id="Upload" type="submit" value="上传" runat="server" onserverclick="Upload_ServerClick"
NAME="Upload">
</form>
<asp:label id="TipInfo" runat="server" Height="25px" Width="249px"></asp:label>
</body>
</HTML>
---Attachme.aspx.cs
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;
namespace UploadFile
{
/// <summary>
/// 多文件上传
/// </summary>
public class Attachme : System.Web.UI.Page
{
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.HtmlControls.HtmlGenericControl txtOutput;
protected System.Web.UI.WebControls.ListBox FileList;
protected System.Web.UI.WebControls.Label TipInfo;
static public ArrayList hif = new ArrayList(); // 保存文件列表
public int filesUploaded = 0; // 上传文件的数量
private void Page_Load(object sender, System.EventArgs e)
{
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
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>
/// 将要上传的文件添加到listbox中
/// </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);
FileList.Items.Add(FindFile.PostedFile.FileName);
}
else
{}
}
/// <summary>
/// 从listbox中删除指定的文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RemvFile_Click(object sender, System.EventArgs e)
{
if(FileList.SelectedIndex == -1)
{
TipInfo.Text = "错误 - 必须指定要删除的文件.";
return;
}
else if(FileList.Items.Count != 0)
{
hif.RemoveAt(FileList.SelectedIndex);
FileList.Items.Remove(FileList.SelectedItem.Text);
TipInfo.Text = "";
}
}
/// <summary>
/// 循环上传listbox中的文件到指定的文件夹下
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void Upload_ServerClick(object sender, System.EventArgs e)
{
string baseLocation = Server.MapPath("UploadFiles/"); // 上传路径
string status = ""; // 上传成功后显示的文件列表
if((FileList.Items.Count == 0) && (filesUploaded == 0))
{
TipInfo.Text = "错误 - 必须指定要上传的文件.";
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)
{
TipInfo.Text = "上传错误 " + baseLocation
+ "<br>" + err.ToString();
}
}
if(filesUploaded == hif.Count)
{
TipInfo.Text = "共上传了 " + filesUploaded + " 个文件。 <br>" + status;
}
hif.Clear();
FileList.Items.Clear();
}
}
}
}
效果图
