ASP.NET实现大文件上传功能

前端技术 2023/09/02 .NET

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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