上传在Web开发中,是非常普遍的一项任务,以前用ASP的时候,一直用稻农的无组件上传工具,觉得很好用,现在学Asp.net了,却发现没有类似原来稻农的无组件上传程序,因此花了点时间,将稻农的无组件上传程序用vb.net改写了一下,可以编译成DLL，在C#或者Vb.net等任意asp.net支持的语言中使用，在共享出来,希望能为大家节约点时间,也欢迎提出意见和建议,让他更完善。

Option Explicit On
Option Strict On

Imports System.IO
Imports System.Data
Imports System.Web.UI.HtmlControls.HtmlInputControl

Public Class UploadFile

    '-------------------------------------------------------------------
  '欢迎转载，但请保留以下声名
   '说明：文件上传类
    '创建时间：2004-11-18
    '作者：刀尖客 QQ:51978456
--------------------------------------------------------------------

    Private LocOrgFileName As String                           '原始文件名
    Private LocNewFileName As String                           '新文件名
    Private LocUploadDir As String = ""                        '保存目录 注意：要完整路径
    Private LocAllowOverWrite As Boolean = False               '如果保存文件已经存在，是否覆盖
    Private LocAllowExtFile As String = "doc,jpg,gif,zip"      '许可格式
    Private LocAllowMaxSize As Integer = 3 * 1024 * 1024       '许可大小

    Public ErrMsg As String                                     '返回的错误提示

    Public ReadOnly Property OrgFileName() As String
        Get
            Return LocOrgFileName
        End Get
    End Property

    Public Property NewFileName() As String
        Get
            Return LocNewFileName
        End Get
        Set(ByVal strValue As String)
            LocNewFileName = strValue
        End Set
    End Property

    Public Property UploadDir() As String
        Get
            Return LocUploadDir
        End Get
        Set(ByVal strValue As String)
            LocUploadDir = strValue
        End Set
    End Property

    Public Property AllowOverWrite() As Boolean
        Get
            Return LocAllowOverWrite
        End Get

        Set(ByVal blnValue As Boolean)
            LocAllowOverWrite = blnValue
        End Set

    End Property

    Public Property AllowMaxSize() As Integ