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在以前的Web應(yīng)用中，上傳文件是個很麻煩的事，現(xiàn)在有了.net，文件上傳變得輕而易舉。下面的這個例子實現(xiàn)了多文件上傳功能。可以動態(tài)添加輸入表單，上傳的文件數(shù)量沒有限制。代碼如下：
MultiUpload.ASPxVB" AutoEventWireup="false" Codebehind="MultiUpload.aspx.vb"  Inherits="aspxWeb.MultiUpload" %>          多文件上傳                                       
       
                                                       
                         
后代碼：MultiUpload.aspx.vbPublic 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 = "多文件上傳"    Upload.Text = "開始上傳"    If (Me.IsPostBack) Then Me.SaveImages()  End Sub    Private Function SaveImages() As System.Boolean    '遍歷File表單元素    Dim files As System.Web.HttpFileCollection = System.Web.HttpContext.Current.Request.Files      '狀態(tài)信息    Dim strMsg As New System.Text.StringBuilder("上傳的文件分別是：")    Dim iFile As System.Int32    Try      For iFile = 0 To files.Count - 1        '檢查文件擴展名字        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("上傳的文件類型：" + postedFile.ContentType.ToString() + "
")          strMsg.Append("客戶端文件地址：" + postedFile.FileName + "
")          strMsg.Append("上傳文件的文件名：" + fileName + "
")          strMsg.Append("上傳文件的擴展名：" + fileExtension + "
")          '可根據(jù)擴展名字的不同保存到不同的文件夾          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 
C# 版本
UpLoad.aspx          多文件上傳                                多文件上傳       
       
                                                 
                                   
UpLoad.aspx.csusing System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using Sy