在Asp.net中实现文件的上传功能，是非常简单的一件事情，只需要利用微软提供的FileUpload控件即可轻松实现。
LargeFileUpload.aspx代码如下
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="LargeFileUpload.aspx.vb"
Inherits="LargeFileUpload" %>
<!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>Upload LargeFile</title>
</head>
<body>
<form id="form1" runat="server" enctype="multipart/form-data">
<! 注意在form中必须有enctype="multipart/form-data"，表示表单中有上传文件，否则文件无法上传>
<div>
<center>
<asp:FileUpload ID="FileUpload1" runat="server" Width="336px" /><br />
<!runat="server" 表示此控件是服务器控件>
<asp:Button ID="btnUpload" runat="server" Text="Upload" />
<asp:Button ID="btnReset" runat="server" Text="Reset" />
</center>
</div>
</form>
</body>
</html>LargeFileUpload.aspx.vb代码如下：Partial Class LargeFileUpload
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Me.IsPostBack Then
'Upload file
Call UploadFiles()
End If
End Sub
Private Sub UploadFiles()
Try
