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[ASP.net教程]asp.net实现大文件上传


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 "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 "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> &nbsp;&nbsp; &nbsp;<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="###" 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");
}