H5手机端多文件上传预览插件

(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"); }

 [HttpPost] public ActionResult UploadImg(HttpPostedFileBase file, string dir = "UserImg") {  if (CheckImg(file, imgtypes) != "ok") return Json(new { Success = false, Message = "文件格式不对！" }, JsonRequestBehavior.AllowGet);  if (file != null)  {  var path = "~/Content/UploadFiles/" + dir + "/";  var uploadpath = Server.MapPath(path);  if (!Directory.Exists(uploadpath))  {   Directory.CreateDirectory(uploadpath);  }  string fileName = Path.GetFileName(file.FileName);// 原始文件名称  string fileExtension = Path.GetExtension(fileName); // 文件扩展名  //string saveName = Guid.NewGuid() + fileExtension; // 保存文件名称 这是个好方法。  string saveName = Encrypt.GenerateOrderNumber() + fileExtension; // 保存文件名称 这是个好方法。  file.SaveAs(uploadpath + saveName);  return Json(new { Success = true, SaveName = path + saveName });  }  return Json(new { Success = false, Message = "请选择要上传的文件！" }, JsonRequestBehavior.AllowGet); }

<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>