H5图片上传插件

(function ($) {
$.extend($, {
fileUpload: function (options) {
var para = {
multiple: true,
filebutton: ".filePicker",
uploadButton: null,
url: "/home/MUploadImg",
filebase: "mfile",//mvc后台需要对应的名称
auto: true,
previewZoom: null,
uploadComplete: function (res) {
console.log("uploadComplete", res);
},
uploadError: function (err) {
console.log("uploadError", err);
},
onProgress: function (percent) { // 提供给外部获取单个文件的上传进度，供外部实现上传进度效果
console.log(percent);
},
};
para = $.extend(para, options); var $self = $(para.filebutton);
//先加入一个file元素
var multiple = ""; // 设置多选的参数
para.multiple ? multiple = "multiple" : multiple = "";

$self.css('position', 'relative');
              $self.append('<input id="fileImage" style="opacity:0;position:absolute;top: 0;left: 0;width:100%;height:100%" type="file" size="30" name="fileselect[]" ' + multiple + '>');

var doms = {
"fileToUpload": $self.parent().find("#fileImage"),
// "thumb": $self.find(".thumb"),
// "progress": $self.find(".upload-progress")
};
var core = {
fileSelected: function () {
var files = (doms.fileToUpload)[0].files;
var count = files.length;
console.log("共有" + count + "个文件");
for (var i = 0; i < count; i++) {
var item = files[i];
console.log(item.size);
if (para.auto) {
core.uploadFile(item);
}
core.previewImage(item);
}
}, uploadFile: function (file) {
console.log("开始上传");
var formdata = new FormData(); formdata.append(para.filebase, file);//这个名字要和mvc后台配合 var xhr = new XMLHttpRequest();
xhr.upload.addEventListener("progress", function (e) { var percentComplete = Math.round(e.loaded * 100 / e.total);
para.onProgress(percentComplete.toString() + '%');
});
xhr.addEventListener("load", function (e) {
para.uploadComplete(xhr.responseText);
});
xhr.addEventListener("error", function (e) {
para.uploadError(e);
}); xhr.open("post", para.url, true);
//xhr.setRequestHeader("X_FILENAME", file.name);
xhr.send(formdata);
},
uploadFiles: function () {
var files = (doms.fileToUpload)[0].files;
for (var i = 0; i < files.length; i++) {
core.uploadFile(files[i]);
}
},
previewImage: function (file) {
if (!para.previewZoom) return;
var img = document.createElement("img");
img.file = file;
$(para.previewZoom).append(img);
// 使用FileReader方法显示图片内容
var reader = new FileReader();
reader.onload = (function (aImg) {
return function (e) {
aImg.src = e.target.result;
};
})(img);
reader.readAsDataURL(file);
}
}
doms.fileToUpload.on("change", function () {
//doms.progress.find("span").width("0");
console.log("选中了文件");
core.fileSelected();
}); console.log("初始化!");
//绑定事件 $(document).on("click", para.filebutton, function () {
console.log("clicked");
//doms.fileToUpload.click();
});
if (para.uploadButton) {
$(document).on("click", para.uploadButton, function () {
core.uploadFiles();
});
}
}
});
})(Zepto);

[HttpPost]
public ActionResult MUploadImg(HttpPostedFileBase mfile)
{
return UploadImg(mfile, "Mobile");
}

<div class="page" id="upload">
<h2>UploadImg</h2>
<div id="dd" class="filePicker">点击选择文件</div>
<div id="preview"></div> </div>
<script>
$.fileUpload({ filebutton: "#dd", previewZoom: "#preview" });
</script>