在ASP.NET中实现多文件上传

王朝asp·作者佚名  2006-05-27
窄屏简体版  字體: |||超大  

在以前的Web应用中,上传文件是个很麻烦的事,现在有了.NET,文件上传变得轻而易举。下面的这个例子实现了多文件上传功能。可以动态添加输入表单,上传的文件数量没有限制。代码如下:

查看例子

MultiUpload.aspx

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="MultiUpload.aspx.vb"

Inherits="aspxWeb.MultiUpload" %>

多文件上传

<script language="JavaScript"script>

<script language="JavaScript"script>

<script language="JavaScript"script>

<script language="JavaScript"script>

后代码:MultiUpload.aspx.vb

Public Class MultiUpload

Inherits System.Web.UI.Page

Protected WithEvents Upload As System.Web.UI.WebControls.Button

Protected WithEvents MyTitle As System.Web.UI.WebControls.Label

Protected WithEvents strStatus As System.Web.UI.WebControls.Label

#Region " Web Form Designer Generated Code "

'This call is required by the Web Form Designer.

Private Sub InitializeComponent()

End Sub

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init

'CODEGEN: This method call is required by the Web Form Designer

'Do not modify it using the code editor.

InitializeComponent()

End Sub

#End Region

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

MyTitle.Text = "多文件上传"

Upload.Text = "开始上传"

If (Me.IsPostBack) Then Me.SaveImages()

End Sub

Private Function SaveImages() As System.Boolean

'遍历File表单元素

Dim files As System.Web.HttpFileCollection = System.Web.HttpContext.Current.Request.Files

'状态信息

Dim strMsg As New System.Text.StringBuilder("上传的文件分别是:")

Dim iFile As System.Int32

Try

For iFile = 0 To files.Count - 1

'检查文件扩展名字

Dim postedFile As System.Web.HttpPostedFile = files(iFile)

Dim fileName, fileExtension As System.String

fileName = System.IO.Path.GetFileName(postedFile.FileName)

If Not (fileName = String.Empty) Then

fileExtension = System.IO.Path.GetExtension(fileName)

strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + "

")

strMsg.Append("客户端文件地址:" + postedFile.FileName + "

")

strMsg.Append("上传文件的文件名:" + fileName + "

")

strMsg.Append("上传文件的扩展名:" + fileExtension + "

")

'可根据扩展名字的不同保存到不同的文件夹

postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("images/") + fileName)

End If

Next

strStatus.Text = strMsg.ToString()

Return True

Catch Ex As System.Exception

strStatus.Text = Ex.Message

Return False

End Try

End Function

End Class

 
 
 
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