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ASP.NET多文件上传代码

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

图片地址


upload.gif
fu_btn.gif

附件

FileUpload.htm:

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>仿163网盘无刷新文件上传系统</title>
</head>
<body>
<style>
.fu_list {
    width:600px;
    background:#ebebeb;
    font-size:12px;
}
.fu_list td {
    padding:5px;
    line-height:20px;
    background-color:#fff;
}
.fu_list table {
    width:100%;
    border:1px solid #ebebeb;
}
.fu_list thead td {
    background-color:#f4f4f4;
}
.fu_list b {
    font-size:14px;
}
/*file容器样式*/
a.files {
    width:90px;
    height:30px;
    overflow:hidden;
    display:block;
    border:1px solid #BEBEBE;
    background:url(img/fu_btn.gif) left top no-repeat;
    text-decoration:none;
}
a.files:hover {
    background-color:#FFFFEE;
    background-position:0 -30px;
}
/*file设为透明,并覆盖整个触发面*/
a.files input {
    margin-left:-350px;
    font-size:30px;
    cursor:pointer;
    filter:alpha(opacity=0);
    opacity:0;
}
/*取消点击时的虚线框*/
a.files, a.files input {
    outline:none;/*ff*/
    hide-focus:expression(this.hideFocus=true);/*ie*/
}
</style>
<form >
  <table border="0" cellspacing="1" class="fu_list">
    <thead>
      <tr>
        <td colspan="2"><b>上传文件</b></td>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td align="right" width="15%" style="line-height:35px;">添加文件:</td>
        <td><a href="javascript:void(0);" class="files" /></td>
      </tr>
      <tr>
        <td colspan="2"><table border="0" cellspacing="0">
            <thead>
              <tr>
                <td>文件路径</td>
                <td width="100"></td>
              </tr>
            </thead>
            <tbody >
            </tbody>
          </table></td>
      </tr>
      <tr>
        <td colspan="2" style="color:gray">温馨提示:最多可同时上传 <b ></b> 文件。 </td>
      </tr>
      <tr>
        <td colspan="2" align="center" />
          &nbsp;&nbsp;&nbsp;
          <input type="button" value="全部取消" />
        </td>
      </tr>
    </tbody>
  </table>
</form>
<script type="text/javascript">

var isIE = (document.all) ? true : false;

var $ = function (id) {
    return "string" == typeof id ? document.getElementById(id) : id;
};

var Class = {
  create: function() {
    return function() {
      this.initialize.apply(this, arguments);
    }
  }
}

var Extend = function(destination, source) {
    for (var property in source) {
        destination[property] = source[property];
    }
}

var Bind = function(object, fun) {
    return function() {
        return fun.apply(object, arguments);
    }
}

var Each = function(list, fun){
    for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};

//文件上传类
var FileUpload = Class.create();
FileUpload.prototype = {
  //表单对象,文件控件存放空间
  initialize: function(form, folder, options) {
    this.Form = $(form);//表单
    this.Folder = $(folder);//文件控件存放空间
    this.Files = [];//文件集合
    this.SetOptions(options);
    this.FileName = this.options.FileName;
    this._FrameName = this.options.FrameName;
    this.Limit = this.options.Limit;
    this.Distinct = !!this.options.Distinct;
    this.ExtIn = this.options.ExtIn;
    this.ExtOut = this.options.ExtOut;
    this.onIniFile = this.options.onIniFile;
    this.onEmpty = this.options.onEmpty;
    this.onNotExtIn = this.options.onNotExtIn;
    this.onExtOut = this.options.onExtOut;
    this.onLimite = this.options.onLimite;
    this.onSame = this.options.onSame;
    this.onFail = this.options.onFail;
    this.onIni = this.options.onIni;
    if(!this._FrameName){
        //为每个实例创建不同的iframe
        this._FrameName = "uploadFrame_" + Math.floor(Math.random() * 1000);
        //ie不能修改iframe的name
        var oFrame = isIE ? document.createElement("<iframe name=\"" + this._FrameName + "\">") : document.createElement("iframe");
        //为ff设置name
        oFrame.name = this._FrameName;
        oFrame.style.display = "none";
        //在ie文档未加载完用appendChild会报错
        document.body.insertBefore(oFrame, document.body.childNodes[0]);
    }
    //设置form属性,关键是target要指向iframe
    this.Form.target = this._FrameName;
    this.Form.method = "post";
    //注意ie的form没有enctype属性,要用encoding
    this.Form.encoding = "multipart/form-data";

    //整理一次
    this.Ini();
  },
  //设置默认属性
  SetOptions: function(options) {
    this.options = {//默认值
        FileName:    "",//文件上传控件的name,配合后台使用
        FrameName:    "",//iframe的name,要自定义iframe的话这里设置name
        onIniFile:    function(){},//整理文件时执行(其中参数是file对象)
        onEmpty:    function(){},//文件空值时执行
        Limit:        0,//文件数限制,0为不限制
        onLimite:    function(){},//超过文件数限制时执行
        Distinct:    true,//是否不允许相同文件
        onSame:        function(){},//有相同文件时执行
        ExtIn:        [],//允许后缀名
        onNotExtIn:    function(){},//不是允许后缀名时执行
        ExtOut:        [],//禁止后缀名,当设置了ExtIn则ExtOut无效
        onExtOut:    function(){},//是禁止后缀名时执行
        onFail:        function(){},//文件不通过检测时执行(其中参数是file对象)
        onIni:        function(){}//重置时执行
    };
    Extend(this.options, options || {});
  },
  //整理空间
  Ini: function() {
    //整理文件集合
    this.Files = [];
    //整理文件空间,把有值的file放入文件集合
    Each(this.Folder.getElementsByTagName("input"), Bind(this, function(o){
        if(o.type == "file"){ o.value && this.Files.push(o); this.onIniFile(o); }
    }))
    //插入一个新的file
    var file = document.createElement("input");
    file.name = this.FileName; file.type = "file"; file.onchange = Bind(this, function(){ this.Check(file); this.Ini(); });
    this.Folder.appendChild(file);
    //执行附加程序
    this.onIni();
  },
  //检测file对象
  Check: function(file) {
    //检测变量
    var bCheck = true;
    //空值、文件数限制、后缀名、相同文件检测
    if(!file.value){
        bCheck = false; this.onEmpty();
    } else if(this.Limit && this.Files.length >= this.Limit){
        bCheck = false; this.onLimite();
    } else if(!!this.ExtIn.length && !RegExp("\.(" + this.ExtIn.join("|") + ")$", "i").test(file.value)){
        //检测是否允许后缀名
        bCheck = false; this.onNotExtIn();
    } else if(!!this.ExtOut.length && RegExp("\.(" + this.ExtOut.join("|") + ")$", "i").test(file.value)) {
        //检测是否禁止后缀名
        bCheck = false; this.onExtOut();
    } else if(!!this.Distinct) {
        Each(this.Files, function(o){ if(o.value == file.value){ bCheck = false; } })
        if(!bCheck){ this.onSame(); }
    }
    //没有通过检测
    !bCheck && this.onFail(file);
  },
  //删除指定file
  Delete: function(file) {
    //移除指定file
    this.Folder.removeChild(file); this.Ini();
  },
  //删除全部file
  Clear: function() {
    //清空文件空间
    Each(this.Files, Bind(this, function(o){ this.Folder.removeChild(o); })); this.Ini();
  }
}

var fu = new FileUpload("uploadForm", "idFile", { Limit: 3, ExtIn: ["jpg", "gif"],
    onIniFile: function(file){ file.value ? file.style.display = "none" : this.Folder.removeChild(file); },
    onEmpty: function(){ alert("请选择一个文件"); },
    onLimite: function(){ alert("超过上传限制"); },
    onSame: function(){ alert("已经有相同文件"); },
    onNotExtIn:    function(){ alert("只允许上传" + this.ExtIn.join(",") + "文件"); },
    onFail: function(file){ this.Folder.removeChild(file); },
    onIni: function(){
        //显示文件列表
        var arrRows = [];
        if(this.Files.length){
            var oThis = this;
            Each(this.Files, function(o){
                var a = document.createElement("a"); a.innerHTML = "取消"; a.href = "javascript:void(0);";
                a.onclick = function(){ oThis.Delete(o); return false; };
                arrRows.push([o.value, a]);
            });
        } else { arrRows.push(["<font color='gray'>没有添加文件</font>", "&nbsp;"]); }
        AddList(arrRows);
        //设置按钮
        $("idBtnupload").disabled = $("idBtndel").disabled = this.Files.length <= 0;
    }
});

$("idBtnupload").onclick = function(){
    //显示文件列表
    var arrRows = [];
    Each(fu.Files, function(o){ arrRows.push([o.value, "&nbsp;"]); });
    AddList(arrRows);
    fu.Folder.style.display = "none";
    $("idProcess").style.display = "";
    $("idMsg").innerHTML = "正在添加文件到您的网盘中,请稍候……<br />有可能因为网络问题,出现程序长时间无响应,请点击“<a href='?'><font color='red'>取消</font></a>”重新上传文件";
    fu.Form.submit();
}

//用来添加文件列表的函数
function AddList(rows){
    //根据数组来添加列表
    var FileList = $("idFileList"), oFragment = document.createDocumentFragment();
    //用文档碎片保存列表
    Each(rows, function(cells){
        var row = document.createElement("tr");
        Each(cells, function(o){
            var cell = document.createElement("td");
            if(typeof o == "string"){ cell.innerHTML = o; }else{ cell.appendChild(o); }
            row.appendChild(cell);
        });
        oFragment.appendChild(row);
    })
    //ie的table不支持innerHTML所以这样清空table
    while(FileList.hasChildNodes()){ FileList.removeChild(FileList.firstChild); }
    FileList.appendChild(oFragment);
}

$("idLimit").innerHTML = fu.Limit;

$("idExt").innerHTML = fu.ExtIn.join(",");

$("idBtndel").onclick = function(){ fu.Clear(); }

//在后台通过window.parent来访问主页面的函数
function Finish(msg){ alert(msg); location.href = location.href; }

</script>
</body>
</html>

File.ashx:

<%@ WebHandler Language="c#" Class="File_WebHandler" Debug="true" %>

using System;
using System.Web;
using System.IO;

public class File_WebHandler : IHttpHandler
{   
    private const int UploadFileLimit = 3;//上传文件数量限制
    private string _msg = "上传成功!";//返回信息

    public void ProcessRequest(HttpContext context)
    {
        int iTotal = context.Request.Files.Count;

        if (iTotal == 0)
        {
            _msg = "没有数据";
        }
        else
        {
            int iCount = 0;

            for (int i = 0; i < iTotal; i++)
            {
                HttpPostedFile file = context.Request.Files[i];

                if (file.ContentLength > 0 || !string.IsNullOrEmpty(file.FileName))
                {
                    //保存文件
                    file.SaveAs(System.Web.HttpContext.Current.Server.MapPath("./file/" + Path.GetFileName(file.FileName)));

                    //这里可以根据实际设置其他限制
                    if (++iCount > UploadFileLimit)
                    {
                        _msg = "超过上传限制:" + UploadFileLimit;
                        break;
                    }
                }
            }
        }
        context.Response.Write("<script>window.parent.Finish('" + _msg + "');</script>");
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}


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