using System.Data; 
using System.Configuration; using System.Collections; 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; public partial class Index : System.Web.UI.Page { 
static public ArrayList hif = new ArrayList(); //10001 保存文件列表 public int filesUploaded = 0; // 10002上传文件的数量 protected void Page_Load(object sender, EventArgs e) 
{ 
} //10003-----------------添加列表 protected void AddFile_Click(object sender, EventArgs e) { if (Page.IsPostBack==true) //这个很重要哦．呵呵．按键在第一次ＰＡＧＥ加载后才起作用 { if (FindFile.HasFile) //判断浏览文本框中有没有文件内容 { hif.Add(FindFile);//把文件完整路径添加到数组中去 FileList.Items.Add( System.IO.Path.GetFileName(FindFile.PostedFile.FileName)); //获取一个待上传的文件名 } else { TipInfo.Text = "<font color=red>错误 - 必须要有上传的文件.</font>"; } } else { } } //10004从listbox中删除指定的文件 protected void DelFile_Click(object sender, EventArgs e) { if (FileList.SelectedIndex == -1) //if the Listbox''s item is not selected { TipInfo.Text = "<font color=red>错误 - 必须指定要删除的文件.</font>"; return; } else if (FileList.Items.Count != 0) { hif.RemoveAt(FileList.SelectedIndex); //Remove the item which is selected from the ArryList FileList.Items.Remove(FileList.SelectedItem.Text); //Remove the item which is selected in the listbox. TipInfo.Text = ""; } } /// <summary> ///10005 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> protected void Upload_Click(object sender, EventArgs e) { string LocalPath = 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)) //judge the listbox''item is nothing { TipInfo.Text = "<font color=red>错误 - 必须指定要上传的图片文件.</font>"; return; } else { foreach (System.Web.UI.WebControls.FileUpload HIF in hif) { try { Boolean fileOK = false; String fileExtension = System.IO.Path.GetExtension(HIF.FileName).ToLower(); String allowedExtensions = { ".gif", ".png", ".jpeg", ".jpg" }; for (int i = 0; i < allowedExtensions.Length; i++) { if (fileExtension == allowedExtensions) { fileOK = true; } } if (fileOK) { string fn = System.IO.Path.GetFileName(HIF.PostedFile.FileName); HIF.PostedFile.SaveAs(LocalPath + fn); filesUploaded++; status += fn + "<br>"; } else { TipInfo.Text = "<font color=red>对不起．你上传的图片格式不对！</font>"; FileList.Items.Clear(); } } catch (Exception err) { TipInfo.Text = "上传错误 " + LocalPath + "<br>" + err.ToString(); } } if (filesUploaded == hif.Count) { TipInfo.Text = "共上传了 " + filesUploaded + " 个图片文件。 <br>" + status; } hif.Clear(); FileList.Items.Clear(); } } }示例代码下载
using 