Displaying uploaded files from server in dropzone js - dropzone.js

Question

I am using the dropzone js plugin to upload files to a php server. It is working great. I am facilitating the user to update the uploaded files. So once the user clicks on update button, the dropzone appears, and I am able to display the uploaded files in it through a JQuery-AJAX call. But my problem is that though the files are displayed in the thumbnail format, the number of files in the dropzone counts to zero. I feel that the accept function is not being triggered.But if a new file is added to the displaying list the file count is 1 though there are files already existing in it.
I am using the following code to display the files in dropzone:
var mockFile = { name: "Filename", size: 12345 };
myDropzone.options.addedfile.call(myDropzone, mockFile);
myDropzone.options.thumbnail.call(myDropzone, mockFile, "/image/url");
Can anyone help me solve this?

Answer 1

I think you need to push the mockFile in the dropZone manually like this
myDropzone.emit("addedfile", mockFile);
myDropzone.emit("complete", mockFile);
myDropzone.files.push(mockFile);
It's work for me... if you need more code just ask!

Answer 2

Mock file is not uploaded as explained here https://github.com/enyo/dropzone/issues/418
If you want to submit the form use myDropzone.uploadFiles([]); in init()
$('input[type="submit"]').on("click", function (e) {
e.preventDefault();
e.stopPropagation();
var form = $(this).closest('#dropzone-form');
if (form.valid() == true) { //trigger ASP.NET MVC validation
if (myDropzone.getQueuedFiles().length > 0) {
myDropzone.processQueue();
} else {
myDropzone.uploadFiles([]);
}
}
});

Answer 3

example for U!
jQuery(function($) {
//文件上传
$(".dropzone").dropzone({
url : "pic_upload.jsp?id=<%=request.getParameter("id")%>",
addRemoveLinks : true,
dictRemoveLinks : "x",
dictCancelUpload : "x",
maxFiles : 5,
maxFilesize : 5,
acceptedFiles: "image/*",
init : function() {
//上传成功处理函数
this.on("success", function(file) {
alert("修改前:"+file.name);
});
this.on("removedfile", function(file) {
alert("File " + file.name + "removed");
//ajax删除数据库的文件信息
$.ajax({
type:'post',
url:'pic_delete.jsp?id='+file.name ,
cache:false,
success:function(data){
}
});
});
<%
if(null!=list){
for(PlaceImg img:list){%>
//add already store files on server
var mockFile = { name: "<%=img.getId()%>", size: <%=img.getFilesize()%> };
// Call the default addedfile event handler
this.emit("addedfile", mockFile);
// And optionally show the thumbnail of the file:
this.emit("thumbnail", mockFile, "<%=img.getImgUrl()%>");
<%}
}%>
}
});