多文件上传

2024-07-21 02:26:09

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来源：转载

供稿：网友

收集最实用的网页特效代码！

---stylesheet.css

.bluebutton
{
background-color:lightsteelblue;
border-style:solid;
border-width: 1px;
border-color: lightskyblue;
}

---attachme.aspx

<%@ page language="c#" codebehind="attachme.aspx.cs" autoeventwireup="false" inherits="uploadfile.attachme" %>
<html>
<head>
  <title>多文件上传</title>
  <link href="stylesheet.css" rel="stylesheet">
</head>
<body>
  <form id="attachme" method="post" enctype="multipart/form-data" runat="server">
   <input class="bluebutton" id="findfile" type="file" size="26" runat="server" name="findfile">
   <br>
   <asp:listbox id="filelist" runat="server" cssclass="txtbox" height="100px" width="274px" selectionmode="multiple"></asp:listbox><br>
   <asp:button id="addfile" runat="server" cssclass="bluebutton" height="23px" width="72px" text="添加文件"></asp:button>
   <asp:button id="remvfile" runat="server" cssclass="bluebutton" height="23px" width="72px" text="删除文件"></asp:button>
   <input class="bluebutton" id="upload" type="submit" value="上传" runat="server" onserverclick="upload_serverclick"
    name="upload">
  </form>
  <asp:label id="tipinfo" runat="server" height="25px" width="249px"></asp:label>
</body>
</html>

---attachme.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 uploadfile
{
/// <summary>
/// 多文件上传
/// </summary>
public class attachme : system.web.ui.page
{
  protected system.web.ui.webcontrols.button addfile;
  protected system.web.ui.webcontrols.button remvfile;
  protected system.web.ui.htmlcontrols.htmlinputfile findfile;
  protected system.web.ui.htmlcontrols.htmlinputbutton upload;
  protected system.web.ui.htmlcontrols.htmlgenericcontrol txtoutput;
  protected system.web.ui.webcontrols.listbox filelist;
  protected system.web.ui.webcontrols.label tipinfo;

  static public arraylist hif = new arraylist(); // 保存文件列表
  public int filesuploaded = 0; // 上传文件的数量

  private void page_load(object sender, system.eventargs e)
  {
  }

  #region web form designer generated code
  override protected void oninit(eventargs e)
  {
   initializecomponent();
   base.oninit(e);
  }

  /// <summary>
  /// required method for designer support - do not modify
  /// the contents of this method with the code editor.
  /// </summary>
  private void initializecomponent()
  {
   this.addfile.click += new system.eventhandler(this.addfile_click);
   this.remvfile.click += new system.eventhandler(this.remvfile_click);
   this.upload.serverclick += new system.eventhandler(this.upload_serverclick);
   this.load += new system.eventhandler(this.page_load);
  }
  #endregion

  /// <summary>
  /// 将要上传的文件添加到listbox中
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void addfile_click(object sender, system.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>
  private void remvfile_click(object sender, system.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();
   }
  }
}
}

效果图