asp.net html控件的File控件实现多文件上传实例分享

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asp.net多文件上传使用html控件的File控件，在form中就需要加入【 enctype="multipart/form-data"】。
up3.aspx文件代码

 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="up3.aspx.cs" Inherits="up3" %> 
<!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></title> 
<script language="javascript" type="text/javascript"> 
function addFile() { 
var odiv = document.getElementById("MyFile"); 
var str = "<div><input name='File' type='file' /></div>"; 
odiv.insertAdjacentHTML("beforeEnd", str); 
} 
function resetFile() { 
var odiv = document.getElementById("MyFile"); 
odiv.innerHTML = "<div><input name='File' type='file' /></div>"; 
} 
</script> 
</head> 
<body> 
<form id="form1" runat="server" enctype="multipart/form-data"> 
<input type="button" value="增加" onclick="addFile()" /> 
<input type="button" value="重置" onclick="resetFile()" /> 
<div id="MyFile"> 
<div><input name="File" type="file" /></div> 
</div> 
<asp:Button runat="server" Text="上传" ID="Button1" OnClick="Button1_Click" BorderColor="Desktop" 
BorderWidth="1px" Height="20px" Width="60px"></asp:Button> 
<div> 
<asp:Label ID="Label1" runat="server"></asp:Label> 
</div> 
</form> 
</body> 
</html> 

up3.aspx.cs文件代码

复制代码代码如下:

 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.IO; 
public partial class up3 : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
} 
protected void Button1_Click(object sender, EventArgs e) 
{ 
string upPath = "/up/"; //上传文件路径 
int upLength = 5; //上传文件大小 
string upFileExtName = "|bmp|jpg|jpeg|png|gif|"; 
HttpFileCollection _files = System.Web.HttpContext.Current.Request.Files; 
int flag = _files.Count; 
int flagN = 0; 
int flagE = 0; 
int flagEE = 0; 
string flagEEstr = ""; 
for (int i = 0; i < _files.Count; i++) 
{ 
string name = _files[i].FileName; 
FileInfo fi = new FileInfo(name); 
string oldfilename = fi.Name; 
string scExtension = fi.Extension.ToLower(); 
string fileName = DateTime.Now.ToString("yyyyMMddhhmmssfff") + fi.Extension; // 文件名称，当前时间（yyyyMMddhhmmssfff） 
string webFilePath = Server.MapPath(upPath) + fileName; // 服务器端文件路径 
if (upFileExtName.IndexOf(scExtension.Replace(".", "")) == -1) 
{ 
flagEE = flagEE + 1; 
flagEEstr = flagEEstr + "第" + (i + 1) + "个文件，文件名[" + oldfilename + "]，文件类型不符合！"; 
continue; 
} 
if ((fi.Length / (1024 * 1024)) > upLength) 
{ 
flagEE = flagEE + 1; 
flagEEstr = flagEEstr + "第" + (i + 1) + "个文件，文件名[" + oldfilename + "]，超出" + upLength + "M大小限制！"; 
continue; 
} 
try 
{ 
_files[i].SaveAs(webFilePath); 
} 
catch (Exception ex) 
{ 
flagEE = flagEE + 1; 
flagEEstr = flagEEstr + "第" + (i + 1) + "个文件，上传异常【"+ex.Message+"】"; 
} 
} 
Label1.Text = "总文件【" + flag + "】，上传成功文件【" + flagN + "】，异常文件【" + (flagE + flagEE) + "】【" + flagEEstr + "】"; 
} 
} 