利用iframe实现ajax异步批量上传图片，WebForm1页面
<form action="WebForm1.aspx" target="dynamic_creation_upload_iframe" method="post" enctype="multipart/form-data">
<input type="file" name="upload1" />
</form>
<iframe name="dynamic_creation_upload_iframe"></iframe>
js插件
/*
无刷新异步上传插件
2014-09-05 Devotion Created
*/
(function ($) {
var defaultSettings = {
url: "", //上传地址
buttonFeature: true, //true:点击按钮时仅选择文件； false:选择完文件后立即上传
fileSuffixs: ["jpg", "png"], //允许上传的文件后缀名列表
errorText: "不能上传后缀为 {0} 的文件！", //错误提示文本，其中{0}将会被上传文件的后缀名替换
onCheckUpload: function (text) { //上传时检查文件后缀名不包含在fileSuffixs属性中时触发的回调函数，(text为错误提示文本)
alert(text);
},
onComplete: function (msg) { //上传完成后的回调函数[不管成功或失败，它都将被触发](msg为服务端的返回字符串)
},
onAllComplete: function () {
},//全部文件上传完成触发的事件
onChosen: function (file, obj, fileSize, errorText) { //选择文件后的回调函数，(file为选中文件的本地路径;obj为当前的上传控件实例;fileSize为当前文件的大小,errorText为获取文件大小时的错误提示文本)
//alert(file);
return true;//在此回调中返回false将取消当前选择的文件
},
maximumFilesUpload: 5,//最大文件选择数(当此属性大于1时，buttonFeature属性只能为true)
submitFilesNum: 3,//最大提交上传数（当触发submitUpload方法时，文件上传的个数）
onSubmitHandle: function (uploadFileNumber) { //提交上传时的回调函数，uploadFileNumber为当前上传的文件数量
//在此回调中返回false上传提交将被阻止
return true;
},
onSameFilesHandle: function (file) { //当重复选择相同的文件时触发
//在此回调中返回false当前选择的文件将从上传队列中取消
return true;
},
isGetFileSize: false,//是否获取文件大小，默认为false
isSaveErrorFile: true,//是否保存上传失败的文件，默认true
perviewElementId: "",//用于预览的元素id（请传入一个div元素的id）
perviewImgStyle: null//用于设置图片预览时的样式（可不设置，在不设置的情况下多文件上传时只能显示一张图片），如{ width: ‘100px‘, height: ‘100px‘, border: ‘1px solid #ebebeb‘ }
};
$.fn.uploadFile = function (settings) {
settings = $.extend({}, defaultSettings, settings || {});
if (settings.perviewElementId) {
//设置图片预览元素的必须样式
if (!settings.perviewImgStyle) {
var perviewImg = document.getElementById(settings.perviewElementId);
perviewImg.style.overflow = "hidden";
}
}
return this.each(function () {
var self = $(this);
var upload = new UploadAssist(settings);
upload.createIframe(this);
//绑定当前按钮点击事件
self.bind("click", function (e) {
upload.chooseFile();
});
//将上传辅助类的实例，存放到当前对象中，方便外部获取
self.data("uploadFileData", upload);
});
};
})(jQuery);
//上传辅助类
function UploadAssist(settings) {
//保存设置
this.settings = settings;
//已选择文件的路径集合
this.choseFilePath = [];
//上传错误文件集合
this.uploadError = [];
//创建的iframe唯一名称
this.iframeName = "upload" + this.getTimestamp();
//提交状态
this.submitStatus = true;
//已经上传的文件数
this.uploadFilesNum = 0;
//上传完成计数
this.uploadNum = 0;
//针对IE上传获取文件大小时的错误提示文本
this.errorText = "请设置浏览器一些参数后再上传文件，方法如下（设置一次即可）：\n请依次点击浏览器菜单中的\n‘工具->Internet选项->安全->可信站点->自定义级别‘\n在弹出的自定义级别窗口中找到 ‘ActiveX控件和插件‘ 项，将下面的子项全部选为 ‘启用‘ 后，点击确定。\n此时不要关闭当前窗口，再点击 ‘站点‘ 按钮，在弹出的窗口中将下面复选框的 ‘√‘ 去掉，然后点击 ‘添加‘ 按钮并关闭当前窗口。\n最后一路 ‘确定‘ 完成并刷新当前页面。";
return this;
}
UploadAssist.prototype = {
//辅助类构造器
constructor: UploadAssist,
//创建iframe
createIframe: function (/*插件中指定的dom对象*/elem) {
var html = "<html>"
+ "<head>"
+ "<title>upload</title>"
+ "<script>"
+ "function getDCMT(iframeName){return window.frames[iframeName].document;}"
+ "</" + "script>"
+ "</head>"
+ "<body>"
+ "</body>"
+ "</html>";
this.iframe = $("<iframe name=‘" + this.iframeName + "‘></iframe>")[0];
this.iframe.style.width = "0px";
this.iframe.style.height = "0px";
this.iframe.style.border = "0px solid #fff";
this.iframe.style.margin = "0px";
elem.parentNode.insertBefore(this.iframe, elem);
var iframeDocument = this.getIframeContentDocument();
iframeDocument.write(html);
},
//获取时间戳
getTimestamp: function () {
return (new Date()).valueOf();
},
//创建上传控件到创建的iframe中
createInputFile: function () {
var that = this;
var dcmt = this.getIframeContentDocument();
var input = dcmt.createElement("input");
var randomNum = this.getTimestamp();
input.type = "file";
$(input).attr("name", "input" + randomNum);
$(input).attr("id", input.name);
input.onchange = function () {
//保存已经选择的文件路径
that.choseFilePath.push({ "name": this.name, "value": this.value });
var fileSuf = this.value.substring(this.value.lastIndexOf(".") + 1);
//检查是否为允许上传的文件
if (!that.checkFileIsUpload(fileSuf, that.settings.fileSuffixs)) {
that.removeFile(this.name);
that.settings.onCheckUpload(that.settings.errorText.replace("{0}", fileSuf));
return;
}
var fileSize;
var errorTxt = null;
//是否获取上传文件大小
if (that.settings.isGetFileSize) {
fileSize = perviewImage.getFileSize(this, dcmt);
if (fileSize == "error") {
fileSize = 0;
errorTxt = that.errorText;
}
}
//选中后的回调
var chosenStatus = that.settings.onChosen(this.value, this, fileSize, errorTxt);
if (typeof chosenStatus === "boolean" && !chosenStatus) {
that.removeFile(this.name);
return;
}
if (that.checkFileIsExist(this.value)) {
var status = that.settings.onSameFilesHandle(this.value);
if (typeof status === "boolean" && !status) {
that.removeFile(this.name);
return;
}
}
//是否开启了图片预览
if (that.settings.perviewElementId) {
if (!that.settings.perviewImgStyle) {
perviewImage.beginPerview(this, that.settings.perviewElementId, dcmt, fileSuf);
} else {
var ul = perviewImage.getPerviewRegion(that.settings.perviewElementId);
var main = perviewImage.createPreviewElement(this.name, this.value, that.settings.perviewImgStyle);
var li = document.createElement("li");
if ($.browser.msie) {
li.style.styleFloat = "left";
}
else {
li.style.cssFloat = "left";
}
li.style.margin = "5px";
li.appendChild(main);
ul.appendChild(li);
var div = $(main).children("div").get(0);
$(main).find("img[name]").hover(function () {
this.src = perviewImage.closeImg.after;
}, function () {
this.src = perviewImage.closeImg.before;
}).click(function () {
that.removeFile($(this).attr("name"));
$(this).parents("li").fadeOut(200, function () {
$(this).remove();
});
});
perviewImage.beginPerview(this, div, dcmt, fileSuf);
}
}
if (!that.settings.buttonFeature) {
that.submitUpload();
}
};
var formName = "form" + randomNum;
var form = $(‘<form method="post" target="iframe‘ + randomNum + ‘" enctype="multipart/form-data" action="‘ + that.settings.url + ‘" name="‘ + formName + ‘"></form>‘);
form.append(input);
$(dcmt.body).append($("<div></div>").append(form)
.append($("<iframe name=‘iframe" + randomNum + "‘></iframe>").on("load", function () {
var dcmt1 = that.getInsideIframeContentDocument(this.name);
if (dcmt1.body.innerHTML) {
//开始上传下一个文件
that.insideOperation();
that.uploadNum++;
//注意：上传失败的响应文本默认为"error"
var responseText = $(dcmt1.body).text();
if (responseText == "error" && that.settings.isSaveErrorFile) {
//保存上传失败的文件
that.uploadError.push(this.name.replace("iframe", "input"));
}
var obj = that.getObjectByName(this.name.replace("iframe", "input"));
if (obj) {
//是否开启了预览
if (that.settings.perviewElementId) {
var closeImg = $("#" + that.settings.perviewElementId).find("img[name=‘" + obj.name + "‘]");
closeImg.next().hide();
if (responseText !== "error") {
//对于上传成功的文件，将它从预览中删除
closeImg.parents("li").fadeOut("slow", function () {
$(this).remove();
});
} else {
//上传失败的文件，加亮显示
closeImg.css("visibility", "visible").parents("li").css({
"border": "1px solid #ff9999",
"background-color": "#ffdddd"
});
}
}
}
if (that.settings.onComplete) {
that.settings.onComplete(dcmt1.body.innerHTML);
}
if (that.uploadNum == that.uploadFilesNum) {
that.submitStatus = true;
that.clearUploadQueue();
that.uploadFilesNum = 0;
that.uploadNum = 0;
that.settings.onAllComplete();
}
dcmt1.body.innerHTML = "";
}
})));
return input;
},
//获取创建的iframe中的document对象
getIframeContentDocument: function () {
return this.iframe.contentDocument || this.iframe.contentWindow.document;
},
//获取创建的iframe所在的window对象
getIframeWindow: function () {
return this.iframe.contentWindow || this.iframe.contentDocument.parentWindow;
},
//获取创建的iframe内部iframe的document对象
getInsideIframeContentDocument: function (iframeName) {
return this.getIframeWindow().getDCMT(iframeName);
},
//获取上传input控件
getUploadInput: function () {
var inputs = this.getIframeContentDocument().getElementsByTagName("input");
var len = inputs.length;
if (len > 0) {
if (!inputs[len - 1].value) {
return inputs[len - 1];
} else {
return this.createInputFile();
}
}
return this.createInputFile();
},
//forEach迭代函数
forEach: function (/*数组*/arr, /*代理函数*/fn) {
var len = arr.length;
for (var i = 0; i < len; i++) {
var tmp = arr[i];
if (fn.call(tmp, i, tmp) == false) {
break;
}
}
},
//提交上传
submitUpload: function () {
var status = this.settings.onSubmitHandle(this.choseFilePath.length);
if (typeof status === "boolean") {
if (!status) {
return;
}
}
this.clearedNotChooseFile();
var sbmtNum = this.settings.submitFilesNum;
var len = this.choseFilePath.length;
var dcmt = this.getIframeContentDocument();
var that = this;
if (!len) return;
if (!this.submitStatus) return;
this.filesNum = len;
//设置有效上传数量，有可能选择的文件小于设置的提交数量
var advisableSubmitNum = sbmtNum < len ? sbmtNum : len;
this.uploadFilesNum = advisableSubmitNum;
this.submitStatus = false;
for (var i = 0; i < advisableSubmitNum; i++) {
(function (n) {
var time = (n + 1) * 500;
window.setTimeout(function () {
var obj = that.choseFilePath[n];
var formName = obj.name.replace("input", "form");
that.forEach(dcmt.forms, function () {
if (this.name == formName) {
this.submit();
return false;
}
});
if (that.settings.perviewElementId) {
//用于设置上传loading图片显示
var imgclose = $("#" + that.settings.perviewElementId).find("img[name=‘" + obj.name + "‘]");
imgclose.next().show();
imgclose.css("visibility", "hidden");
}
}, time);
})(i);
}
},
//内部提交操作，外部不能调用
insideOperation: function () {
var len = this.choseFilePath.length;
var dcmt = this.getIframeContentDocument();
var that = this;
if (!len) return;
var obj = this.choseFilePath[this.uploadFilesNum];
if (obj && obj.name) {
this.uploadFilesNum++;
(function (o) {
window.setTimeout(function () {
var formName = o.name.replace("input", "form");
that.forEach(dcmt.forms, function (i) {
if (this.name == formName) {
this.submit();
return false;
}
});
if (that.settings.perviewElementId) {
//用于设置上传loading图片显示
var imgclose = $("#" + that.settings.perviewElementId).find("img[name=‘" + o.name + "‘]");
imgclose.next().show();
imgclose.css("visibility", "hidden");
}
}, 300);
})(obj);
}
},
//检查文件是否可以上传
checkFileIsUpload: function (fileSuf, suffixs) {
var status = false;
this.forEach(suffixs, function (i, n) {
if (fileSuf.toLowerCase() === n.toLowerCase()) {
status = true;
return false;
}
});
return status;
},
//检查上传的文件是否已经存在上传队列中
checkFileIsExist: function (/*当前上传的文件*/file) {
var status = false;
this.forEach(this.choseFilePath, function (i, n) {
if (n.value == file) {
status = true;
return false;
}
});
return status;
},
//清除未选择文件的上传控件
clearedNotChooseFile: function () {
var files = this.getIframeContentDocument().getElementsByTagName("input");
this.forEach(files, function (i, n) {
if (!n.value) {
var div = n.parentNode.parentNode;
div.parentNode.removeChild(div);
return false;
}
});
},
//将指定上传的文件从上传队列中删除
removeFile: function (name) {
var that = this;
var files = this.getIframeContentDocument().getElementsByTagName("input");
this.forEach(this.choseFilePath, function (i, n) {
if (n.name == name) {
that.forEach(files, function (j, m) {
if (m.name == n.name) {
var div = m.parentNode.parentNode;
div.parentNode.removeChild(div);
return false;
}
});
that.choseFilePath.splice(i, 1);
return false;
}
});
},
//获取选择的上传文件对象
getObjectByName: function (name) {
var obj, that = this;
this.forEach(this.choseFilePath, function (i) {
if (this.name === name) {
obj = that.choseFilePath[i];
return false;
}
});
return obj;
},
//清空上传队列
clearUploadQueue: function () {
var len = this.uploadError.length;
var that = this;
if (!len) {
this.choseFilePath.length = 0;
this.getIframeContentDocument().body.innerHTML = "";
} else {
var errorFiles = this.uploadError.join();
var newArr = this.choseFilePath.slice(0);
this.forEach(newArr, function () {
if (errorFiles.indexOf(this.name) == -1) {
that.removeFile(this.name);
}
});
}
this.uploadError.length = 0;
},
//选择上传文件
chooseFile: function () {
var uploadfile;
if (!this.choseFilePath.length && this.settings.perviewElementId) {
$("#" + this.settings.perviewElementId).find("ul").empty();
}
if (this.choseFilePath.length == this.settings.maximumFilesUpload) {
if (this.settings.maximumFilesUpload <= 1) {
this.choseFilePath.length = 0;
var files = this.getIframeContentDocument().getElementsByTagName("input");
if (!files.length) {
uploadfile = this.getUploadInput();
$(uploadfile).click();
return;
} else {
uploadfile = files[0];
$(uploadfile).click();
return;
}
} else {
return;
}
}
uploadfile = this.getUploadInput();
$(uploadfile).click();
}
};
//图片预览操作
var perviewImage = {
timers: [],
closeImg: {
before: "data:image/png;base64,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",
after: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAA3XAAAN1wFCKJt4AAAAB3RJTUUH1wwbFhkQHxvdFgAAArpJREFUeNplz1to1QUAx/HP/3/O2c7OrudsR8vmamOL2hw5LaQHgxKCLvQSRVgPFhJKo4cyMsmxKNQgfOuhfKxICQTpocvAIFhai/WSTNIcnK3pbu12tnO2cwsfbZ+H3+MXfgGbfURDgn0xHgiIFskUuPgOE/7njsBxahsYqAnDN1p3765N9/QIYzGL4+Myw8PlbC53fp23j5HZFBhgSxPft27f3tfX36+ure2O+sbKiitnzrg2MjK/xjNH+RUCeJbo41xsSyb3PtR/WLQuLhIGVAJKlEsUSyUBrp8966+xsdkl+o7zTwiP8mqSvffu6ZMLs+565YAVWRvL1xSWrpufvmHr/v3y1dVu30pHIuk4pxCEiCQ4nIyEYk15heakmm3bdR06Zrq0LjM3ruPNI+o7O8V7uy1NTkjV10vw4ns0Rw6Q7uCTdLwS1LfMyM+Mytxa0r73aVse2adp52Oau7pd/eGCq4MHNUxPKc4sy1dEylwOt3FPNUH09gTrWhILSr+d9N3pQfGGpHRXjz9/+tHoqRe0t8yqasyK1lKNKlrDdYpVCEqUixRLLBZTep98DkD7zofFO3pVGqlqJlJDDDEK4TkmQlbXc+QWGZ9P2TMwpHXHLpnL541+dVRtMuWp00NmGncpxCkUCLDGWDjJWp6LG0XmJtn6xOu2PrjLzUvn3fr6JdVXP3btmyNqGlN2vHbC/Dxry5SZ+pTfIyh3MN3Jyxt54cKVYYXVKZPn3peIFkTK5G5ckp34W+bLE7IjeWGOOT78gp8DQPwzBtt5dymkkqTmbuIpYnUEAblZsldIrLLB0AGeX2QlAEDD5xy7n7eWia2GlKsREhaIb9CEZS58wKFRplGJAGD9W36JMXwf9cmKdF1RIlGgrmS1zOU/GDjIyZv8iwoENguRQKqblnqiI8yUWUAWJQD4D4Cg/5i7WltRAAAAAElFTkSuQmCC"
},
loading: "data:image/gif;base64,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",
fileImg: "data:image/png;base64,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",
//获取预览元素
getElementObject: function (elem) {
if (elem.nodeType && elem.nodeType === 1) {
return elem;
} else {
return document.getElementById(elem);
}
},
//开始图片预览
beginPerview: function (/*文件上传控件实例*/file, /*需要显示的元素id或元素实例*/perviewElemId,/*上传页面所在的document对象*/ dcmt,/*文件后缀名*/ fileSuf) {
var imgSufs = ",jpg,jpeg,bmp,png,gif,";
var isImage = imgSufs.indexOf("," + fileSuf.toLowerCase() + ",") > -1;//检查是否为图片
if (isImage) {
this.imageOperation(file, perviewElemId, dcmt);
} else {
this.fileOperation(perviewElemId, fileSuf);
}
},
//一般文件显示操作
fileOperation: function (/*需要显示的元素id或元素实例*/perviewElemId,/*文件后缀名*/ fileSuf) {
var preview_div = this.getElementObject(perviewElemId);
var MAXWIDTH = preview_div.clientWidth;
var MAXHEIGHT = preview_div.clientHeight;
var img = document.createElement("img");
preview_div.appendChild(img);
img.style.visibility = "hidden";
img.src = this.fileImg;
img.onload = function () {
var rect = perviewImage.clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
img.style.width = rect.width + ‘px‘;
img.style.height = rect.height + ‘px‘;
img.style.marginLeft = rect.left + ‘px‘;
img.style.marginTop = rect.top + ‘px‘;
img.style.visibility = "visible";
}
var txtTop = 0 - (MAXHEIGHT * 2 / 3);
$(‘<div style="text-align:center; position:relative; z-index:100; color:#404040;font: 13px/27px Arial,sans-serif;"></div>‘)
.text(fileSuf + "文件").css("top", txtTop + "px").appendTo(preview_div);
},
//图片预览操作
imageOperation: function (/*文件上传控件实例*/file, /*需要显示的元素id或元素实例*/perviewElemId,/*上传页面所在的document对象*/ dcmt) {
for (var t = 0; t < this.timers.length; t++) {
window.clearInterval(this.timers[t]);
}
this.timers.length = 0;
var preview_div = this.getElementObject(perviewElemId);
var MAXWIDTH = preview_div.clientWidth;
var MAXHEIGHT = preview_div.clientHeight;
if (file.files && file.files[0]) { //此处为Firefox，Chrome以及IE10的操作
preview_div.innerHTML = "";
var img = document.createElement("img");
preview_div.appendChild(img);
img.style.visibility = "hidden";
img.onload = function () {
var rect = perviewImage.clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
img.style.width = rect.width + ‘px‘;
img.style.height = rect.height + ‘px‘;
img.style.marginLeft = rect.left + ‘px‘;
img.style.marginTop = rect.top + ‘px‘;
img.style.visibility = "visible";
}
var reader = new FileReader();
reader.onload = function (evt) {
img.src = evt.target.result;
}
reader.readAsDataURL(file.files[0]);
}
else {//此处为IE6，7，8，9的操作
file.select();
var src = dcmt.selection.createRange().text;
var div_sFilter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=‘scale‘,src=‘" + src + "‘)";
var img_sFilter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=‘image‘,src=‘" + src + "‘)";
preview_div.innerHTML = "";
var img = document.createElement("div");
preview_div.appendChild(img);
img.style.filter = img_sFilter;
img.style.visibility = "hidden";
img.style.width = "100%";
img.style.height = "100%";
function setImageDisplay() {
var rect = perviewImage.clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
preview_div.innerHTML = "";
var div = document.createElement("div");
div.style.width = rect.width + ‘px‘;
div.style.height = rect.height + ‘px‘;
div.style.marginLeft = rect.left + ‘px‘;
div.style.marginTop = rect.top + ‘px‘;
div.style.filter = div_sFilter;
preview_div.appendChild(div);
}
//图片加载计数
var tally = 0;
var timer = window.setInterval(function () {
if (img.offsetHeight != MAXHEIGHT) {
window.clearInterval(timer);
setImageDisplay();
} else {
tally++;
}
//如果超过两秒钟图片还不能加载，就停止当前的轮询
if (tally > 20) {
window.clearInterval(timer);
setImageDisplay();
}
}, 100);
this.timers.push(timer);
}
},
//按比例缩放图片
clacImgZoomParam: function (maxWidth, maxHeight, width, height) {
var param = { width: width, height: height };
if (width > maxWidth || height > maxHeight) {
var rateWidth = width / maxWidth;
var rateHeight = height / maxHeight;
if (rateWidth > rateHeight) {
param.width = maxWidth;
param.height = Math.round(height / rateWidth);
} else {
param.width = Math.round(width / rateHeight);
param.height = maxHeight;
}
}
param.left = Math.round((maxWidth - param.width) / 2);
param.top = Math.round((maxHeight - param.height) / 2);
return param;
},
//创建图片预览元素
createPreviewElement: function (/*关闭图片名称*/name,/*上传时的文件名*/file, /*预览时的样式*/style) {
var img = document.createElement("div");
img.title = file;
img.style.overflow = "hidden";
for (var s in style) {
img.style[s] = style[s];
}
var text = document.createElement("div");
text.style.width = style.width;
text.style.overflow = "hidden";
text.style.textOverflow = "ellipsis";
text.style.whiteSpace = "nowrap";
text.innerHTML = file;
var top = 0 - window.parseInt(style.width) - 15;
var right = 0 - window.parseInt(style.width) + 14;
var close = document.createElement("img");
close.setAttribute("name", name);
close.src = this.closeImg.before;
close.style.position = "relative";
close.style.top = top + "px";
close.style.right = right + "px";
close.style.cursor = "pointer";
var loadtop = (0 - window.parseInt(style.height)) / 2 - 26;
var loadright = (0 - window.parseInt(style.width)) / 2 + 22;
var imgloading = document.createElement("img");
imgloading.src = this.loading;
imgloading.style.position = "relative";
imgloading.style.top = loadtop + "px";
imgloading.style.right = loadright + "px";
imgloading.style.display = "none";
var main = document.createElement("div");
main.appendChild(img);
main.appendChild(text);
main.appendChild(close);
main.appendChild(imgloading);
return main;
},
//获取预览区域
getPerviewRegion: function (elem) {
var perview = $(this.getElementObject(elem));
if (!perview.find("ul").length) {
var ul = document.createElement("ul");
ul.style.listStyleType = "none";
ul.style.margin = "0px";
ul.style.padding = "0px";
var div = document.createElement("div");
div.style.clear = "both";
perview.append(ul).append(div);
return ul;
} else {
return perview.children("ul").get(0);
}
},
//获取上传文件大小
getFileSize: function (/*上传控件dom对象*/file, /*上传控件所在的document对象*/dcmt) {
var fileSize;
if (file.files && file.files[0]) {
fileSize = file.files[0].size;
} else {
file.select();
var src = dcmt.selection.createRange().text;
try {
var fso = new ActiveXObject("Scripting.FileSystemObject");
var fileObj = fso.getFile(src);
fileSize = fileObj.size;
} catch (e) {
return "error";
}
}
fileSize = ((fileSize / 1024) + "").split(".")[0];
return fileSize;
}
}
Index页面引用
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>files upload</title>
<script src="Scripts/jquery-1.7.1.min.js"></script>
<script src="Scripts/notRefreshFilesUpload.js"></script>
<script>
$(function () {
//var btn = $("#Button1");
var btn = $("#Button1").uploadFile({
url: "WebForm1.aspx",
fileSuffixs: ["jpg", "png", "gif", "txt"],
maximumFilesUpload: 10,//最大文件上传数
onComplete: function (msg) {
$("#testdiv").append(msg + "<br/>");
},
onAllComplete: function () {
alert("全部上传完成");
},
isGetFileSize: true,//是否获取上传文件大小，设置此项为true时，将在onChosen回调中返回文件fileSize和获取大小时的错误提示文本errorText
onChosen: function (file, obj, fileSize, errorText) {
if (!errorText) {
$("#file_size").text(file + "文件大小为：" + fileSize + "KB");
} else {
alert(errorText);
return false;
}
return true;//返回false将取消当前选择的文件
},
perviewElementId: "fileList", //设置预览图片的元素id
perviewImgStyle: { width: ‘100px‘, height: ‘100px‘, border: ‘1px solid #ebebeb‘ }//设置预览图片的样式
});
var upload = btn.data("uploadFileData");
$("#files").click(function () {
upload.submitUpload();
});
});
</script>
</head>
<div id="file_size" style="width: 400px; border-bottom: 1px solid #C0C0C0;"></div>
<div style="width: 400px; height: 300px;">
<div style="font-size: 13px; font-weight:bold;color: #808080;font-family:‘微软雅黑‘,‘黑体‘,‘华文细黑‘;">对于上传按钮和选择文件按钮，你可以使用其他任何形式的元素，可以是图片或一切你能想到的东西，都是可以的</div>
<input id="Button1" type="button" value="选择文件" />
<input id="files" type="button" value="上传" />
<!-- <div style="width: 420px; height: 180px; overflow:auto;border:1px solid #C0C0C0;">-->
<div id="fileList" style="margin-top: 10px; padding-top:10px; font-size: 13px; width:400px">
</div>
<!-- </div>-->
</div>
<br/>
<div id="testdiv"></div>
时间： 2024-08-15 06:53:40