在ASP.NET中实现多文件上传
作者：孟宪会 出自：【孟宪会之精彩世界】 发布日期：2003年5月20日 11点41分7秒
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：
MultiUpload.aspx
1@ Page Language="vb" AutoEventWireup="false" Codebehind="MultiUpload.aspx.vb" Inherits="aspxWeb.MultiUpload"
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
C# 版本
UpLoad.aspx
1@ Page language="c#" Codebehind="UpLoad.aspx.cs" AutoEventWireup="false" Inherits="WebPortal.Upload"
多文件上传
UpLoad.aspx.cs
using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; namespace WebPortal { /// /// UpLoad 的摘要说明。 /// 实现多文件上传 /// public class Upload : System.Web.UI.Page { protected System.Web.UI.WebControls.Button UploadButton; protected System.Web.UI.WebControls.Label strStatus; private void Page_Load(object sender, System.EventArgs e) { /// 在此处放置用户代码以初始化页面 if (this.IsPostBack) this.SaveImages(); } private Boolean SaveImages() { ///'遍历File表单元素 HttpFileCollection files = HttpContext.Current.Request.Files; /// '状态信息 System.Text.StringBuilder strMsg = new System.Text.StringBuilder(); strMsg.Append("上传的文件分别是：
"); try { for(int iFile = 0; iFile < files.Count; iFile++) { ///'检查文件扩展名字 HttpPostedFile postedFile = files[iFile]; string fileName, fileExtension; fileName = System.IO.Path.GetFileName(postedFile.FileName); if (fileName != "") { 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 ///注意：可能要修改你的文件夹的匿名写入权限。 postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("images/") + fileName); } } strStatus.Text = strMsg.ToString(); return true; } catch(System.Exception Ex) { strStatus.Text = Ex.Message; return false; } } #region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// private void InitializeComponent() { this.ID = "Upload"; this.Load += new System.EventHandler(this.Page_Load); } #endregion } }