这个仿163网盘无刷新文件上传系统,并没有用使用.net的控件,完全的手工制作。前台基本上是静态的,跟后台没有关系,所以后台用什么语言做都可以(例子中是用.net)。
本来觉得这个系统会很复杂,但把每个部分都分析清楚后,其实需要的技术并不高。不过当我把各个功能函数都整理好准备进行封装时,却发现要把程序封装不是那么容易,因为程序跟html的耦合度太高。然后我逐步把程序中操作html相关的部分分离出来,首先把简单的分离,接着是文件列表,然后是file控件,最后是一些提示性程序。经过几次尝试才把整个结构封装好,现在程序结构应该算比较清晰,有什么不明白的地方欢迎留言。
效果预览
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Code
<form id=”uploadForm” action=”File.ashx”>
<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” id=”idFile”></a> <img id=”idProcess” style=”display:none;” src=”img/loading.gif” /></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 id=”idFileList”>
</tbody>
</table></td>
</tr>
<tr>
<td colspan=”2″ style=”color:gray”>温馨提示:最多可同时上传 <b id=”idLimit”></b> 个文件,只允许上传 <b id=”idExt”></b> 文件。 </td>
</tr>
<tr>
<td colspan=”2″ align=”center” id=”idMsg”><input type=”button” value=”开始上传” id=”idBtnupload” disabled=”disabled” />
<input type=”button” value=”全部取消” id=”idBtndel” disabled=”disabled” />
</td>
</tr>
</tbody>
</table>
</form>
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程序代码
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Code
var isIE = (document.all) ? true : false;
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var = function (id) {
return “string” == typeof id ? document.getElementById(id) : id;
};
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var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
}
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var Extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
}
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var Bind = function(object, fun) {
return function() {
return fun.apply(object, arguments);
}
}
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var Each = function(list, fun){
for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};
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//
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”;
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//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();
}
}
测试代码
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Code
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>", " "]); }
AddList(arrRows);
//设置按钮
(“idBtnupload”).disabled = (“idBtndel”).disabled = this.Files.length <= 0;
}
});
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(“idBtnupload”).onclick = function(){
//显示文件列表
var arrRows = [];
Each(fu.Files, function(o){ arrRows.push([o.value, " "]); });
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();
}
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//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);
}
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(“idLimit”).innerHTML = fu.Limit;
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(“idExt”).innerHTML = fu.ExtIn.join(“,”);
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(“idBtndel”).onclick = function(){ fu.Clear(); }
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//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; }
\n下载完整测试代码
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来源:http://www.cnblogs.com/cloudgamer
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