在ASP.NET中实现多文件上传

在ASP.NET中实现多文件上传

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:

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MultiUpload.aspx

<xmp><%@ Page Language="vb" AutoEventWireup="false" Codebehind="MultiUpload.aspx.vb" Inherits="aspxWeb.MultiUpload" %> <html> <head> 多文件上传 <script language="JavaScript"> function addFile() { var str = '' document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str) } </script> </head> <body> <asp:label id="MyTitle" runat="server"></asp:label>

<asp:button text="上传" id="Upload" runat="server"></asp:button>

<asp:label font-size="9pt" bordercolor="White" id="strStatus" borderstyle="None" font-bold="True" font-names="宋体" width="500px" runat="server"></asp:label>

</body> </html> </xmp>

后代码:MultiUpload.aspx.vb

<xmp>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. <system.diagnostics.debuggerstepthrough()> 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 </xmp>

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