Use formdata append with #HTML.BeginForm without ajax call - javascript

What I'm trying to achieve is to append a file to a post request which I got from a drag & drop field with javascript.
The problem is, I don't want to read all input fields and post the data by ajax call, I want to use the default submit method from #HTML.BeginForm.
When I do this, the multipart doesn't really contain the file.
(Attention: It works when I just submit the file or when I read all input fields manually and submit with a separate ajax.)
My code:
Drag&Drop js:
var file;
var isDragged = false;
var formData;
function dropHandler(ev) {
isDragged = true;
ev.preventDefault();
// Use DataTransfer interface to access the file(s)
for (var i = 0; i < ev.dataTransfer.files.length; i++) {
file = ev.dataTransfer.files[i];
formData = new FormData($("#form"));
formData.append("File.PayLoad", file);
formData.append("File.FileMetadataId", $('#File_FileMetadataId').val())
formData.append("File.FileObjectId", $('#File_FileObjectId').val())
}
}
HTML:
#using (Html.BeginForm("Edit", "DocumentTemplates", FormMethod.Post, new { role = "form", enctype = "multipart/form-data", id = "form" }))
{
#Html.AntiForgeryToken()
<div class="row">
<div class="col-xs-4">
#Html.LabelFor(model => model.Language)
</div>
<div class="col-xs-8">
#Html.HiddenFor(model => model.Language) #Html.DisplayFor(model => model.Language)
</div>
</div>
<div class="row">
<div class="col-xs-8">
#Html.TextBoxFor(model => model.File.Payload, new { type = "file", #id = "browseFile", ondrop = "dropHandler(event);", ondragover = "dragOverHandler(event);" })
#Html.ValidationMessageFor(model => model.File.Payload, null, new { #class = "text-danger" }) or Drag & Drop a File.
</div>
</div>
}
Request in Fiddler with empty Filename:
-----------------------------7e27b381715d4
Content-Disposition: form-data; name="File.FileMetadataId"
44
-----------------------------7e27b381715d4
Content-Disposition: form-data; name="File.FileObjectId"
44
-----------------------------7e27b381715d4
Content-Disposition: form-data; name="File.Payload"; filename=""
Content-Type: application/octet-stream
-----------------------------7e27b381715d4--
UPDATE:
I found out, you can overwrite the files from a file input, but only in Chrome. Since I need it to work on IE 11, this doesn't help me, but maybe it helps someone else. You don't need to append all the form fields, but just set the input type file to your dropped file and submit…

You have several problems there. One of the problems is code below. You missed one } in your code.
If you put it like below, the last value just store in file that is incorrect.
for (var i = 0; i < ev.dataTransfer.files.length; i++) {
file = ev.dataTransfer.files[i];
} // missing }
If you put it like below, the last value just store in formData that is incorrect.
function dropHandler(ev) {
isDragged = true;
ev.preventDefault();
// Use DataTransfer interface to access the file(s)
for (var i = 0; i < ev.dataTransfer.files.length; i++) {
file = ev.dataTransfer.files[i];
formData = new FormData($("#form"));
formData.append("File.PayLoad", file);
formData.append("File.FileMetadataId", $('#File_FileMetadataId').val());
formData.append("File.FileObjectId", $('#File_FileObjectId').val());
}
} // missing }
Second problem is ev.dataTransfer.files. As you can see in File drag and drop, it's better to check ev.dataTransfer.items and sometimes it has your files and ev.dataTransfer.files is empty.
Finally, you can do it like this:
function dropHandler(ev) {
isDragged = true;
ev.preventDefault();
formData = new FormData($("#form"));
if (ev.dataTransfer.items) {
// Use DataTransferItemList interface to access the file(s)
for (var i = 0; i < ev.dataTransfer.items.length; i++) {
// If dropped items aren't files, reject them
if (ev.dataTransfer.items[i].kind === 'file') {
var file = ev.dataTransfer.items[i].getAsFile();
formData.append("File.PayLoad" + i, file);
}
}
} else {
// Use DataTransfer interface to access the file(s)
for (var i = 0; i < ev.dataTransfer.files.length; i++) {
file = ev.dataTransfer.files[i];
formData.append("File.PayLoad" + i, file);
}
}
}

Related

Javascript handling multiple files upload

I'm working on a project with the following steps:
Creating the form with multiple images upload
Previewing, remove images on queue before upload
Handling the file input value before submit
Here is my code
var fileList = [];
function toObject(arr) {
var rv = {};
for (var i = 0; i < arr.length; ++i)
rv[i] = arr[i];
return rv;
}
//Image prev
// Multiple images preview in browser
var imagesPreview = function (input, imageContainer) {
if (input.files) {
var filesAmount = input.files.length;
$(imageContainer).html('');
for (i = 0; i < filesAmount; i++) {
var reader = new FileReader();
reader.onload = function (event) {
var html = '<div class="image-item col-sm-6 col-md-4 col-lg-3"><div class="image-wrapper">' +
' <img src="'
+ event.target.result + '"/></div></div>';
$(html).appendTo(imageContainer);
}
var files = input.files;
fileList.push(files[i]);
reader.readAsDataURL(input.files[i]);
}
input.files = toObject(fileList);
}
};
$('#input-image').on('change', function () {
imagesPreview(this, '.image-container');
});
<div class="image-item">
<!-- input the image from user -->
<input id="input-image" type="file" name="photos[]" multiple>
<hr>
<div class="image-container row">
<!-- Previewing the image thumbnail -->
</div>
</div>
My questions: Can I set the value of the input-image with fileList variable because I set it but error occurs
Sry, a bit tired, will not go into depth or solve the hole thing...
There is only one way to change the value of file inputs and that is with another FileList instance. the only way you can get them is with some new api's so it won't work in all browsers. I made a function to help you with that.
var fileList = [];
// only way to change input[type=file] value is with a other FileList instance
// and this is the only way to construct a new FileList
function createFileList(a) {
a = [].slice.call(Array.isArray(a) ? a : arguments)
for (var c, b = c = a.length, d = !0; b-- && d;) d = a[b] instanceof File
if (!d) throw new TypeError('expected argument to FileList is File or array of File objects')
for (b = (new ClipboardEvent('')).clipboardData || new DataTransfer; c--;) b.items.add(a[c])
return b.files
}
// This is what you got to do later when they remove a image
//
// this will trigger a change event so you maybe want to temporary
// turn off the change event listener
//
// input.files = createFileList(fileList)
// Image prev
// Multiple images preview in browser
function imagesPreview(input, imageContainer) {
$(imageContainer).empty();
var URL = window.URL || window.webkitURL;
var $html = $(
'<div class="image-item col-sm-6 col-md-4 col-lg-3">'+
'<div class="image-wrapper"> <img></div></div>'
);
$.each(input.files, function(i, file) {
var $clone = $html.clone()
// could be a good idea to revoke url also
$clone.find('img').attr('src', URL.createObjectURL(file))
$clone.appendTo(imageContainer);
fileList.push(file);
});
}
$('#input-image').on('change', function () {
imagesPreview(this, '.image-container');
});
The other solution is to append each file into a formdata and send the form using ajax

Multiple files upload in onedrive (skydrive)?

It is possible to upload multiple files in onedrive(skydrive) using WL.upload ? I tried something but I always get an error like "element must be an html input element" or something like this. I use onedrive sdk 5.6 and the application is build in ASP.NET MVC 5. The problem is that I created an input of type="file" with the attribute multiple set so I can select multiple files from my computer but the upload method from WL api ask for an element property that is actual an id to an input element of type="file". Because my input is set on multiple I tried to iterate through the files that contains and to create an input element to pass to the method, but it's doesn't work because due to security reasons I can set a value of an input element.
So, does anybody knows how I can do this ? Thanks
This is what I have tried:
<div id="save-to-skydrive-dialog-content-multiple">
<p>select a file</p>
<form enctype='multipart/form-data' method='POST'>
<input id="save-to-skydrive-file-input-multiple" type="file" name="files[]" multiple />
</form>
<p>upload file</p>
<button id="save-to-skydrive-upload-multiple-button">upload multiple</button>
</div>
function saveMultipleToSkyDrive() {
WL.fileDialog({
mode: 'save'
}).then(function (response) {
var folder = response.data.folders[0];
var elements = document.getElementById("save-to-skydrive-file-input-multiple").files;
for (var i = 0; i < elements.length; i++) {
var htmlInPutElement = document.createElement('input');
htmlInPutElement.setAttribute('type', 'file');
htmlInPutElement.value = elements.item(i);
WL.api({
})
WL.upload({
path: folder.id,
element: htmlInPutElement,
overwrite: 'rename'
}).then(function (response) {
log("You save to" + response.source + ". " + "Below is the result of the upload");
log("");
log(JSON.stringify(response));
},
function (errorResponse) {
log("WL.upload errorResponse = " + JSON.stringify(errorResponse));
},
function (progress) {
});
}
}, function (errorResponse) {
log("WL.upload errorResponse = " + JSON.stringify(errorResponse));
}
);
Thanks.
From what I remember of messing with the input[file] element, you can't set the value of an input[file] like that, for security reasons.
var htmlInPutElement = document.createElement('input');
htmlInPutElement.setAttribute('type', 'file');
htmlInPutElement.value = elements.item(i);
A solution would be to post the files to an interim action on your controller, and then do the OneDrive API stuff in that action method instead. You can iterate through Request.Files (although it can be tricky with the multiple property, I learned the hard way - see this post for more info
I find the answer, but not in javascript, in c# code.
Html input:
<p>Upload Files</p>
<div id="save-to-skydrive-dialog-content">
#using (Html.BeginForm("UploadFiles", "Auth", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" multiple />
<input type="submit" value="Upload File"/>
}
</div>
C# method:
[HttpPost]
public async Task<ActionResult> UploadFiles()
{
var files = Request.Files;
if (Request.Files.Count > 0)
{
LiveLoginResult loginStatus = await authClient.InitializeWebSessionAsync(HttpContext);
if (loginStatus.Status == LiveConnectSessionStatus.Connected)
{
connectedClient = new LiveConnectClient(this.authClient.Session);
LiveOperationResult result = await connectedClient.GetAsync("me/skydrive");
string folderId = (string)result.Result["id"];
for (var i = 0; i < Request.Files.Count; i++)
{
var fileName = Request.Files[i].FileName;
var fileStream = Request.Files[i].InputStream;
LiveOperationResult uploadResult = await connectedClient.UploadAsync(folderId, fileName, fileStream, OverwriteOption.Overwrite);
}
}
}
return View("~/Views/Home/Index.cshtml");
}

How to bind files to input[type="file"] in javascript

I have div which was dropzone to drop file(s) in the div,
<div id="dropZone"></div>
<input type="file" id=fileUpload"/>
I want to bind drop files to the html file type "fileUpload" control. I have tried like
but not getting. is it possible?
I have written the script for the div
$('#dropZone').bind('dragenter', ignoreDrag);
$('#dropZone').bind('dragover', ignoreDrag);
$('#dropZone').bind('drop', function (e) {
drop(e);
});
Edited and Added script
//Updated
function ignoreDrag(e) {
e.originalEvent.stopPropagation();
e.originalEvent.preventDefault();
}
//Updated End
and in the drop function
function drop(e) {
ignoreDrag(e);
var dt = e.originalEvent.dataTransfer;
var droppedFiles = dt.files;
if (dt.files.length > 0) {
for (var i = 0; i < dt.files.length; i++) {
var fileName = droppedFiles[0].name;
$("#lblMsg").show();
$("#spnFile").text(fileName);
var formData = new FormData();
formData.append("fileUploaded", droppedFiles);
alert(dt.files[0]);
$("#fileUploaded").bind("val", dt.files[0]);
// Binding to file(s) to the <input type="file"/> but not binding.
}
}
}
Is this possible to bind like above??

Jquery upload files when open button is pressed

i have the following code, the issue i have is that i am getting a error of e.originalEvent.dataTransfer is undefined.
my code is as follows
HTML
Select images: <input type="file" id='fileupload' name="userfile[]" multiple>
Javascript is as follows
var hot = $('#fileupload');
hot.change(function (e)
{
e.preventDefault();
var files = e.originalEvent.dataTransfer.files;
//send dropped files to Server
handleFileUpload(files,hot);
});
function handleFileUpload(files,obj)
{
for (var i = 0; i < files.length; i++)
{
var fd = new FormData();
var e = document.getElementById("child_id");
fd.append('userfile[]', files[i]);
var filename=files[i].name;
var status = new createStatusbar(obj,files[i]); //Using this we can set progress.
status.setFileNameSize(files[i].name,files[i].size);
sendFileToServer(fd,status,filename);
}
}
The attribute files belongs to the input field. This you'll get by the target attribute.
If I test the setting above, I have success with this descriptor:
e.originalEvent.target.files
Then, files is an array of File objects, containing name, lastModifiedDate, type etc.

How do I remove a file from the FileList

I'm building a drag-and-drop-to-upload web application using HTML5, and I'm dropping the files onto a div and of course fetching the dataTransfer object, which gives me the FileList.
Now I want to remove some of the files, but I don't know how, or if it's even possible.
Preferably I'd like to just delete them from the FileList; I've got no use for them. But if that's not possible, should I instead write in checks in code that interacts with the FileList? That seems cumbersome.
If you want to delete only several of the selected files: you can't. The File API Working Draft you linked to contains a note:
The HTMLInputElement interface
[HTML5] has a readonly FileList
attribute, […]
[emphasis mine]
Reading a bit of the HTML 5 Working Draft, I came across the Common input element APIs. It appears you can delete the entire file list by setting the value property of the input object to an empty string, like:
document.getElementById('multifile').value = "";
BTW, the article Using files from web applications might also be of interest.
Since JavaScript FileList is readonly and cannot be manipulated directly,
BEST METHOD
You will have to loop through the input.files while comparing it with the index of the file you want to remove. At the same time, you will use new DataTransfer() to set a new list of files excluding the file you want to remove from the file list.
With this approach, the value of the input.files itself is changed.
removeFileFromFileList(index) {
const dt = new DataTransfer()
const input = document.getElementById('files')
const { files } = input
for (let i = 0; i < files.length; i++) {
const file = files[i]
if (index !== i)
dt.items.add(file) // here you exclude the file. thus removing it.
}
input.files = dt.files // Assign the updates list
}
ALTERNATIVE METHOD
Another simple method is to convert the FileList into an array and then splice it.
But this approach will not change the input.files
const input = document.getElementById('files')
// as an array, u have more freedom to transform the file list using array functions.
const fileListArr = Array.from(input.files)
fileListArr.splice(index, 1) // here u remove the file
console.log(fileListArr)
This question has already been marked answered, but I'd like to share some information that might help others with using FileList.
It would be convenient to treat a FileList as an array, but methods like sort, shift, pop, and slice don't work. As others have suggested, you can copy the FileList to an array. However, rather than using a loop, there's a simple one line solution to handle this conversion.
// fileDialog.files is a FileList
var fileBuffer=[];
// append the file list to an array
Array.prototype.push.apply( fileBuffer, fileDialog.files ); // <-- here
// And now you may manipulated the result as required
// shift an item off the array
var file = fileBuffer.shift(0,1); // <-- works as expected
console.info( file.name + ", " + file.size + ", " + file.type );
// sort files by size
fileBuffer.sort(function(a,b) {
return a.size > b.size ? 1 : a.size < b.size ? -1 : 0;
});
Tested OK in FF, Chrome, and IE10+
If you are targeting evergreen browsers (Chrome, Firefox, Edge, but also works in Safari 9+) or you can afford a polyfill, you can turn the FileList into an array by using Array.from() like this:
let fileArray = Array.from(fileList);
Then it's easy to handle the array of Files like any other array.
Since we are in the HTML5 realm, this is my solution. The gist is that you push the files to an Array instead of leaving them in a FileList, then using XHR2, you push the files to a FormData object. Example below.
Node.prototype.replaceWith = function(node)
{
this.parentNode.replaceChild(node, this);
};
if(window.File && window.FileList)
{
var topicForm = document.getElementById("yourForm");
topicForm.fileZone = document.getElementById("fileDropZoneElement");
topicForm.fileZone.files = new Array();
topicForm.fileZone.inputWindow = document.createElement("input");
topicForm.fileZone.inputWindow.setAttribute("type", "file");
topicForm.fileZone.inputWindow.setAttribute("multiple", "multiple");
topicForm.onsubmit = function(event)
{
var request = new XMLHttpRequest();
if(request.upload)
{
event.preventDefault();
topicForm.ajax.value = "true";
request.upload.onprogress = function(event)
{
var progress = event.loaded.toString() + " bytes transfered.";
if(event.lengthComputable)
progress = Math.round(event.loaded / event.total * 100).toString() + "%";
topicForm.fileZone.innerHTML = progress.toString();
};
request.onload = function(event)
{
response = JSON.parse(request.responseText);
// Handle the response here.
};
request.open(topicForm.method, topicForm.getAttribute("action"), true);
var data = new FormData(topicForm);
for(var i = 0, file; file = topicForm.fileZone.files[i]; i++)
data.append("file" + i.toString(), file);
request.send(data);
}
};
topicForm.fileZone.firstChild.replaceWith(document.createTextNode("Drop files or click here."));
var handleFiles = function(files)
{
for(var i = 0, file; file = files[i]; i++)
topicForm.fileZone.files.push(file);
};
topicForm.fileZone.ondrop = function(event)
{
event.stopPropagation();
event.preventDefault();
handleFiles(event.dataTransfer.files);
};
topicForm.fileZone.inputWindow.onchange = function(event)
{
handleFiles(topicForm.fileZone.inputWindow.files);
};
topicForm.fileZone.ondragover = function(event)
{
event.stopPropagation();
event.preventDefault();
};
topicForm.fileZone.onclick = function()
{
topicForm.fileZone.inputWindow.focus();
topicForm.fileZone.inputWindow.click();
};
}
else
topicForm.fileZone.firstChild.replaceWith(document.createTextNode("It's time to update your browser."));
I have found very quick & short workaround for this. Tested in many popular browsers (Chrome, Firefox, Safari);
First, you have to convert FileList to an Array
var newFileList = Array.from(event.target.files);
to delete the particular element use this
newFileList.splice(index,1);
I know this is an old question but it's ranking high on search engines in regards to this issue.
properties in the FileList object cannot be deleted but at least on Firefox they can be changed. My workaround this issue was to add a property IsValid=true to those files that passed check and IsValid=false to those that didn't.
then I just loop through the list to make sure that only the properties with IsValid=true are added to FormData.
This is extemporary, but I had the same problem which I solved this way. In my case I was uploading the files via XMLHttp request, so I was able to post the FileList cloned data through formdata appending. Functionality is that you can drag and drop or select multiple files as many times as you want (selecting files again won't reset the cloned FileList), remove any file you want from the (cloned) file list, and submit via xmlhttprequest whatever was left there. This is what I did. It is my first post here so code is a little messy. Sorry. Ah, and I had to use jQuery instead of $ as it was in Joomla script.
// some global variables
var clon = {}; // will be my FileList clone
var removedkeys = 0; // removed keys counter for later processing the request
var NextId = 0; // counter to add entries to the clone and not replace existing ones
jQuery(document).ready(function(){
jQuery("#form input").change(function () {
// making the clone
var curFiles = this.files;
// temporary object clone before copying info to the clone
var temparr = jQuery.extend(true, {}, curFiles);
// delete unnecessary FileList keys that were cloned
delete temparr["length"];
delete temparr["item"];
if (Object.keys(clon).length === 0){
jQuery.extend(true, clon, temparr);
}else{
var keysArr = Object.keys(clon);
NextId = Math.max.apply(null, keysArr)+1; // FileList keys are numbers
if (NextId < curFiles.length){ // a bug I found and had to solve for not replacing my temparr keys...
NextId = curFiles.length;
}
for (var key in temparr) { // I have to rename new entries for not overwriting existing keys in clon
if (temparr.hasOwnProperty(key)) {
temparr[NextId] = temparr[key];
delete temparr[key];
// meter aca los cambios de id en los html tags con el nuevo NextId
NextId++;
}
}
jQuery.extend(true, clon, temparr); // copy new entries to clon
}
// modifying the html file list display
if (NextId === 0){
jQuery("#filelist").html("");
for(var i=0; i<curFiles.length; i++) {
var f = curFiles[i];
jQuery("#filelist").append("<p id=\"file"+i+"\" style=\'margin-bottom: 3px!important;\'>" + f.name + "<a style=\"float:right;cursor:pointer;\" onclick=\"BorrarFile("+i+")\">x</a></p>"); // the function BorrarFile will handle file deletion from the clone by file id
}
}else{
for(var i=0; i<curFiles.length; i++) {
var f = curFiles[i];
jQuery("#filelist").append("<p id=\"file"+(i+NextId-curFiles.length)+"\" style=\'margin-bottom: 3px!important;\'>" + f.name + "<a style=\"float:right;cursor:pointer;\" onclick=\"BorrarFile("+(i+NextId-curFiles.length)+")\">x</a></p>"); // yeap, i+NextId-curFiles.length actually gets it right
}
}
// update the total files count wherever you want
jQuery("#form p").text(Object.keys(clon).length + " file(s) selected");
});
});
function BorrarFile(id){ // handling file deletion from clone
jQuery("#file"+id).remove(); // remove the html filelist element
delete clon[id]; // delete the entry
removedkeys++; // add to removed keys counter
if (Object.keys(clon).length === 0){
jQuery("#form p").text(Object.keys(clon).length + " file(s) selected");
jQuery("#fileToUpload").val(""); // I had to reset the form file input for my form check function before submission. Else it would send even though my clone was empty
}else{
jQuery("#form p").text(Object.keys(clon).length + " file(s) selected");
}
}
// now my form check function
function check(){
if( document.getElementById("fileToUpload").files.length == 0 ){
alert("No file selected");
return false;
}else{
var _validFileExtensions = [".pdf", ".PDF"]; // I wanted pdf files
// retrieve input files
var arrInputs = clon;
// validating files
for (var i = 0; i < Object.keys(arrInputs).length+removedkeys; i++) {
if (typeof arrInputs[i]!="undefined"){
var oInput = arrInputs[i];
if (oInput.type == "application/pdf") {
var sFileName = oInput.name;
if (sFileName.length > 0) {
var blnValid = false;
for (var j = 0; j < _validFileExtensions.length; j++) {
var sCurExtension = _validFileExtensions[j];
if (sFileName.substr(sFileName.length - sCurExtension.length, sCurExtension.length).toLowerCase() == sCurExtension.toLowerCase()) {
blnValid = true;
break;
}
}
if (!blnValid) {
alert("Sorry, " + sFileName + " is invalid, allowed extensions are: " + _validFileExtensions.join(", "));
return false;
}
}
}else{
alert("Sorry, " + arrInputs[0].name + " is invalid, allowed extensions are: " + _validFileExtensions.join(" or "));
return false;
}
}
}
// proceed with the data appending and submission
// here some hidden input values i had previously set. Now retrieving them for submission. My form wasn't actually even a form...
var fecha = jQuery("#fecha").val();
var vendor = jQuery("#vendor").val();
var sku = jQuery("#sku").val();
// create the formdata object
var formData = new FormData();
formData.append("fecha", fecha);
formData.append("vendor", encodeURI(vendor));
formData.append("sku", sku);
// now appending the clone file data (finally!)
var fila = clon; // i just did this because I had already written the following using the "fila" object, so I copy my clone again
// the interesting part. As entries in my clone object aren't consecutive numbers I cannot iterate normally, so I came up with the following idea
for (i = 0; i < Object.keys(fila).length+removedkeys; i++) {
if(typeof fila[i]!="undefined"){
formData.append("fileToUpload[]", fila[i]); // VERY IMPORTANT the formdata key for the files HAS to be an array. It will be later retrieved as $_FILES['fileToUpload']['temp_name'][i]
}
}
jQuery("#submitbtn").fadeOut("slow"); // remove the upload btn so it can't be used again
jQuery("#drag").html(""); // clearing the output message element
// start the request
var xhttp = new XMLHttpRequest();
xhttp.addEventListener("progress", function(e) {
var done = e.position || e.loaded, total = e.totalSize || e.total;
}, false);
if ( xhttp.upload ) {
xhttp.upload.onprogress = function(e) {
var done = e.position || e.loaded, total = e.totalSize || e.total;
var percent = done / total;
jQuery("#drag").html(Math.round(percent * 100) + "%");
};
}
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var respuesta = this.responseText;
jQuery("#drag").html(respuesta);
}
};
xhttp.open("POST", "your_upload_handler.php", true);
xhttp.send(formData);
return true;
}
};
Now the html and styles for this. I'm quite a newbie but all this actually worked for me and took me a while to figure it out.
<div id="form" class="formpos">
<!-- Select the pdf to upload:-->
<input type="file" name="fileToUpload[]" id="fileToUpload" accept="application/pdf" multiple>
<div><p id="drag">Drop your files here or click to select them</p>
</div>
<button id="submitbtn" onclick="return check()" >Upload</button>
// these inputs are passed with different names on the formdata. Be aware of that
// I was echoing this, so that's why I use the single quote for php variables
<input type="hidden" id="fecha" name="fecha_copy" value="'.$fecha.'" />
<input type="hidden" id="vendor" name="vendorname" value="'.$vendor.'" />
<input type="hidden" id="sku" name="sku" value="'.$sku.'"" />
</div>
<h1 style="width: 500px!important;margin:20px auto 0px!important;font-size:24px!important;">File list:</h1>
<div id="filelist" style="width: 500px!important;margin:10px auto 0px!important;">Nothing selected yet</div>
The styles for that. I had to mark some of them !important to override Joomla behavior.
.formpos{
width: 500px;
height: 200px;
border: 4px dashed #999;
margin: 30px auto 100px;
}
.formpos p{
text-align: center!important;
padding: 80px 30px 0px;
color: #000;
}
.formpos div{
width: 100%!important;
height: 100%!important;
text-align: center!important;
margin-bottom: 30px!important;
}
.formpos input{
position: absolute!important;
margin: 0!important;
padding: 0!important;
width: 500px!important;
height: 200px!important;
outline: none!important;
opacity: 0!important;
}
.formpos button{
margin: 0;
color: #fff;
background: #16a085;
border: none;
width: 508px;
height: 35px;
margin-left: -4px;
border-radius: 4px;
transition: all .2s ease;
outline: none;
}
.formpos button:hover{
background: #149174;
color: #0C5645;
}
.formpos button:active{
border:0;
}
I hope this helps.
Thanks #Nicholas Anderson simple and straight , here is your code applied and working at my code using jquery.
HTML .
<input class="rangelog btn border-aero" id="file_fr" name="file_fr[]" multiple type="file" placeholder="{$labels_helpfiles_placeholder_file}">
<span style="cursor: pointer; cursor: hand;" onclick="cleanInputs($('#file_fr'))"><i class="fa fa-trash"></i> Empty chosen files</span>
JS CODE
function cleanInputs(fileEle){
$(fileEle).val("");
var parEle = $(fileEle).parent();
var newEle = $(fileEle).clone()
$(fileEle).remove();
$(parEle).prepend(newEle);
}
There might be a more elegant way to do this but here is my solution. With Jquery
fileEle.value = "";
var parEle = $(fileEle).parent();
var newEle = $(fileEle).clone()
$(fileEle).remove();
parEle.append(newEle);
Basically you cleat the value of the input. Clone it and put the clone in place of the old one.
If you have the luck to be sending a post request to the database with the files and you have the files you want to send in your DOM
you can simply check if the file in the file list is present in your DOM, and of course if it's not you just don't send that element to de DB.
I realize this is a pretty old question, however I am using an html multiple file selection upload to queue any number of files which can be selectively removed in a custom UI before submitting.
Save files in a variable like this:
let uploadedFiles = [];
//inside DOM file select "onChange" event
let selected = e.target.files[0] ? e.target.files : [];
uploadedFiles = [...uploadedFiles , ...selected ];
createElements();
Create UI with "remove a file":
function createElements(){
uploadedFiles.forEach((f,i) => {
//remove DOM elements and re-create them here
/* //you can show an image like this:
* let reader = new FileReader();
* reader.onload = function (e) {
* let url = e.target.result;
* // create <img src=url />
* };
* reader.readAsDataURL(f);
*/
element.addEventListener("click", function () {
uploadedFiles.splice(i, 1);
createElements();
});
}
}
Submit to server:
let fd = new FormData();
uploadedFiles.forEach((f, i) => {
fd.append("files[]", f);
});
fetch("yourEndpoint", {
method: "POST",
body: fd,
headers: {
//do not set Content-Type
}
}).then(...)
I mix the solutions of many developers and reach to this solution.
It change the original array list after deletion which means if we want to save the images then we can do so.
<script>
var images = [];
function image_select() {
var image = document.getElementById('image').files;
for (i = 0; i < image.length; i++) {
images.push({
"name" : image[i].name,
"url" : URL.createObjectURL(image[i]),
"file" : image[i],
})
}
document.getElementById('container').innerHTML = image_show();
}
function image_show() {
var image = "";
images.forEach((i) => {
image += `<div class="image_container d-flex justify-content-center position-relative">
<img src="`+ i.url +`" alt="Image">
<span class="position-absolute" onclick="delete_image(`+ images.indexOf(i) +`)">×</span>
</div>`;
})
return image;
}
function delete_image(e) {
images.splice(e, 1);
document.getElementById('container').innerHTML = image_show();
const dt = new DataTransfer()
const input = document.getElementById('image')
const { files } = input
for (let i = 0; i < files.length; i++) {
const file = files[i]
if (e !== i)
dt.items.add(file);
}
input.files = dt.files;
console.log(document.getElementById('image').files);
}
</script>
*******This is html code ******
<body>
<div class="container mt-3 w-100">
<div class="card shadow-sm w-100">
<div class="card-header d-flex justify-content-between">
<h4>Preview Multiple Images</h4>
<form class="form" action="{{route('store')}}" method="post" id="form" enctype="multipart/form-data">
#csrf
<input type="file" name="image[]" id="image" multiple onchange="image_select()">
<button class="btn btn-sm btn-primary" type="submit">Submit</button>
</form>
</div>
<div class="card-body d-flex flex-wrap justify-content-start" id="container">
</div>
</div>
</div>
</body>
******* This is CSS code ********
<style>
.image_container {
height: 120px;
width: 200px;
border-radius: 6px;
overflow: hidden;
margin: 10px;
}
.image_container img {
height: 100%;
width: auto;
object-fit: cover;
}
.image_container span {
top: -6px;
right: 8px;
color: red;
font-size: 28px;
font-weight: normal;
cursor: pointer;
}
</style>
You may wish to create an array and use that instead of the read-only filelist.
var myReadWriteList = new Array();
// user selects files later...
// then as soon as convenient...
myReadWriteList = FileListReadOnly;
After that point do your uploading against your list instead of the built in list. I am not sure of the context you are working in but I am working with a jquery plugin I found and what I had to do was take the plugin's source and put it in the page using <script> tags. Then above the source I added my array so that it can act as a global variable and the plugin could reference it.
Then it was just a matter of swapping out the references.
I think this would allow you to also add drag & drop as again, if the built in list is read-only then how else could you get the dropped files into the list?
:))
I solve it this way
//position -> the position of the file you need to delete
this.fileImgs.forEach((item, index, object) => {
if(item.idColor === idC){
if(item.imgs.length === 1){
object.splice(index,1) }
else{
const itemFileImgs = [...item.imgs];
itemFileImgs.splice(position,1)
item.imgs = [...itemFileImgs]
}
}});
console.log(this.fileImgs)
In vue js :
self.$refs.inputFile.value = ''
I just change the type of input to the text and back to the file :D

Categories

Resources