ASP.NET实现大文件上传功能

程序员文章站 2023-11-21 11:42:58

需要下载neatupload插件上传页面： <%@ page language="c#" autoeventwireup="true" codefile...

需要下载neatupload插件

上传页面：

<%@ page language="c#" autoeventwireup="true" codefile="index.aspx.cs" inherits="_default" %>

<%@ register assembly="brettle.web.neatupload" namespace="brettle.web.neatupload"
  tagprefix="upload" %>

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title></title>
   <link href="easyui/themes/default/easyui.css" rel="stylesheet" type="text/css" />
  <link href="easyui/themes/icon.css" rel="stylesheet" type="text/css" />
  <script src="easyui/jquery.min.js" type="text/javascript"></script>
  <script src="easyui/jquery.easyui.min.js" type="text/javascript"></script>
</head>
<body>
  <form id="form1" runat="server">
  <div class="easyui-panel" style="padding:5px;">
    <upload:progressbar id="progressbar1" runat='server'>
    </upload:progressbar>
   <br />
  <upload:inputfile id="attachfile" runat="server" />
  <br />
  <br />
  <asp:linkbutton id="btnup" runat="server" class="easyui-linkbutton" data-options="iconcls:'icon-add'" onclick="btnup_click">上 传</asp:linkbutton><br /><br />
  <a href="down.aspx">查看下载</a>
  </div>
  </form>
</body>
</html>

后台源码：

protected void btnup_click(object sender, eventargs e)
  {
    if (attachfile.hasfile)
    {
      string filename = this.attachfile.filename;//获取上传文件的文件名,包括后缀
      string extenname = system.io.path.getextension(filename);//获取扩展名
      string savefilename = system.io.path.combine(system.web.httpcontext.current.request.mappath("uploads/"), datetime.now.tolongdatestring().tostring() + "-" + filename);//合并两个路径为上传到服务器上的全路径
      attachfile.moveto(savefilename, brettle.web.neatupload.movetooptions.overwrite);
      string url = "uploads/" + datetime.now.tostring("yyyymmddhhmmss") + extenname; //文件保存的路径
      float filesize = (float)system.math.round((float)attachfile.contentlength / 1024000, 1); //获取文件大小并保留小数点后一位,单位是m
      response.write("<script>alert('恭喜您，上传成功!')</script>");
    }
    else
    {
      response.write("<script>alert('请选择文件！')</script>");
    }
  }

这里直接获取上传文件夹文件名称提供下载

<%@ page language="c#" autoeventwireup="true" codefile="down.aspx.cs" inherits="down" %>

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title></title>
  <link href="easyui/themes/default/easyui.css" rel="stylesheet" type="text/css" />
  <link href="easyui/themes/icon.css" rel="stylesheet" type="text/css" />
  <script src="easyui/jquery.min.js" type="text/javascript"></script>
  <script src="easyui/jquery.easyui.min.js" type="text/javascript"></script>
  <style type="text/css">
    .div_style ul li
    {
       list-style-type: decimal;
       border-bottom:1px dashed #e3e3e3;
       margin-bottom:5px;
    }
    .div_style ul li a
    {
      text-decoration: none;
      cursor: pointer;
      font-size: 16px;
    }
  </style>
</head>
<body>
  <form id="form1" runat="server">
  <div class="div_style easyui-panel" style="padding: 5px;">
  <a href="index.aspx">上传文件</a>
    <asp:label id="label1" runat="server" text=""></asp:label>
    <ul id="www_zzjs_net">
      <%if (files.length == 0) { label1.text = "暂无文件"; }
       else
       {

         foreach (system.io.fileinfo item in files)
         {%>
      <li><a href="default2.aspx?1=<%=item%>">
        <%=item %></a>     <a href="delete.aspx?1=<%=item%>" onclick="javascript:return confirm('确定删除吗？');" >删除附件</a>
      </li>
      <% }
     }%>
    </ul>
  </div>
  <div id="changpage"></div>
  <%--js分页--%>
<%--<script language="javascript">
  var obj, j;
  var page = 0;
  var nowpage = 0; //当前页
  var listnum = 25; //每页显示<ul>数
  var pageslen; //总页数
  var pagenum = 4; //分页链接接数(5个)
  onload = function () {
    obj = document.getelementbyid("www_zzjs_net").getelementsbytagname("li");
    j = obj.length
    pageslen = math.ceil(j / listnum);
    uppage(0)
  }
  function uppage(p) {
    nowpage = p
    //内容变换
    for (var i = 0; i < j; i++) {
      obj[i].style.display = "none"
    }
    for (var i = p * listnum; i < (p + 1) * listnum; i++) {
      if (obj[i]) obj[i].style.display = "block"
    } //欢迎来到站长特效网，我们的网址是www.zzjs.net，很好记，zz站长，js就是js特效，本站收集大量高质量js代码，还有许多广告代码下载。
    //分页链接变换
    strs = '<a href="###" onclick="uppage(0)">首页</a> '
    var pagenum_2 = pagenum % 2 == 0 ? math.ceil(pagenum / 2) + 1 : math.ceil(pagenum / 2)
    var pagenum_3 = pagenum % 2 == 0 ? math.ceil(pagenum / 2) : math.ceil(pagenum / 2) + 1
    var strc = "", startpage, endpage;
    if (pagenum >= pageslen) { startpage = 0; endpage = pageslen - 1 }
    else if (nowpage < pagenum_2) { startpage = 0; endpage = pageslen - 1 > pagenum ? pagenum : pageslen - 1 } //首页
    else { startpage = nowpage + pagenum_3 >= pageslen ? pageslen - pagenum - 1 : nowpage - pagenum_2 + 1; var t = startpage + pagenum; endpage = t > pageslen ? pageslen - 1 : t }
    for (var i = startpage; i <= endpage; i++) {
      if (i == nowpage) strc += '<a href="###" style="color:red;font-weight:700;" onclick="uppage(' + i + ')">' + (i + 1) + '</a> '
      else strc += '<a href="###" onclick="uppage(' + i + ')">' + (i + 1) + '</a> '
    } //欢迎来到站长特效网，我们的网址是www.zzjs.net，很好记，zz站长，js就是js特效，本站收集大量高质量js代码，还有许多广告代码下载。
    stre = ' <a href="###" onclick="uppage(' + (pageslen - 1) + ')">尾页</a> '
    stre2 = nowpage + 1 + "/" + pageslen + "页" + " 共" + j + "条"
    document.getelementbyid("changpage").innerhtml = strs + strc + stre + stre2
  }
</script>--%>
  </form>
</body>
</html>

//下面是后台代码
public fileinfo[] files { set; get; }
protected void page_load(object sender, eventargs e)
{
string dirpath = httpcontext.current.server.mappath("~/uploads");
if (directory.exists(dirpath))
{
directoryinfo dir = new directoryinfo(dirpath);
files = dir.getfiles("*.*");
}
if (files.length == 0) { label1.text = "暂无文件"; }
}

 

//这是新建另一个页面提供下载的代码

if (request.querystring["1"] != null)
{


string _filename = request.querystring["1"].tostring(), _filepath = system.io.path.combine(mappath("~/uploads"), _filename);
if (system.io.file.exists(_filepath))
{
response.clear();
response.buffer = true;

response.addheader("content-disposition", "attachment;filename=" + _filename);
response.contenttype = "application/unknow";
response.transmitfile(_filepath);
response.end();
}
}

 

//这是新建另一个页面提供删除操作（后台）

string _filename = request.querystring["1"].tostring(), _filepath = system.io.path.combine(mappath("~/uploads"), _filename);
if (system.io.file.exists(_filepath))
{
file.delete(_filepath);
response.write("<script language=javascript>alert('删除成功！');window.location = 'down.aspx';</script>");
//response.redirect("down.aspx");
}

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