default.aspx.cs

可以同时批量上传文件（包括图片）

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace _1aspxUploads
{
    //51aspx.com多文件上传示例
    public partial class _Default : System.Web.UI.Page
    {
        static public ArrayList hif = new ArrayList(); // 保存文件列表
        public int filesUploaded = 0; // 上传文件的数量

        protected void Page_Load(object sender, EventArgs e)
        {

        }
       /// <summary>
        /// 将要上传的文件添加到listbox中
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>

        protected void AddFile_Click(object sender, EventArgs e)
        {
            if (Page.IsPostBack == true)
            {
                hif.Add(FindFile);
                FileList.Items.Add(FindFile.PostedFile.FileName);
            }
            else
            { }

        }

        /// <summary>
        /// 从listbox中删除指定的文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void RemvFile_Click(object sender, EventArgs e)
        {
            if (FileList.SelectedIndex == -1)
            {
                TipInfo.Text = "错误 - 必须指定要删除的文件.";
                return;
            }
            else if (FileList.Items.Count != 0)
            {
                hif.RemoveAt(FileList.SelectedIndex);
                FileList.Items.Remove(FileList.SelectedItem.Text);
                TipInfo.Text = "";
            }           

        }

          /// <summary>
  /// 循环上传listbox中的文件到指定的文件夹下
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
        public void Upload_ServerClick(object sender, System.EventArgs e)
        {
            string baseLocation = Server.MapPath("UploadFiles/"); // 上传路径   
            string status = "";  // 上传成功后显示的文件列表         

            if ((FileList.Items.Count == 0) && (filesUploaded == 0))
            {
                TipInfo.Text = "错误 - 必须指定要上传的文件.";
                return;
            }
            else
            {
                foreach (System.Web.UI.HtmlControls.HtmlInputFile HIF in hif)
                {
                    try
                    {
                        string fn = System.IO.Path.GetFileName(HIF.PostedFile.FileName);
                        HIF.PostedFile.SaveAs(baseLocation + fn);
                        filesUploaded++;
                        status += fn + "<br>";
                    }
                    catch (Exception err)
                    {
                        TipInfo.Text = "上传错误 " + baseLocation
                         + "<br>" + err.ToString();
                    }
                }

                if (filesUploaded == hif.Count)
                {
                    TipInfo.Text = "共上传了 " + filesUploaded + " 个文件。 <br>" + status;
                }
                hif.Clear();
                FileList.Items.Clear();
            }

        }
    }
}