Modal Pop-Up Not Passing iFormFile Data On JavaScript Ajax Intercept
Question
This is sort of an add-on to my previous question: Modal Pop-Up Not Closing Properly After Form Submission
I'm trying to reuse the modal pop-up functionality for another pop-up on the same page. This time I am using it to upload a file. This is the javascript in question:
$('body').on('click', '.relative', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
var dataToSend = form.serialize();
$.post(actionUrl, dataToSend).done(function (data) {
$('body').find('.modal-content').html(data);
var isValid = $('body').find('[name="IsValid"]').val() == 'True';
if (isValid) {
$('body').find('#modal-container').modal('hide');
window.location.href = "/Issue/Edit";
}
});
})
I inadvertently misspelled "relative" on the submit button of this form:
@model Models.AttachmentModel
<!--Modal Body Start-->
<div class="modal-content">
<input name="IsValid" type="hidden" value="@ViewData.ModelState.IsValid.ToString()" />
<!--Modal Header Start-->
<div class="modal-header">
<h4 class="modal-title">Upload File</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
</div>
<!--Modal Header End-->
<form asp-action="FileUpload" method="post" enctype="multipart/form-data" asp-controller="Attachment">
@Html.AntiForgeryToken()
<div class="modal-body form-horizontal">
<div>
<p>Upload a file using this form:</p>
<input type="file" name="file" />
<span asp-validation-for="@Model.aFileData" class="text-danger"></span>
</div>
<div>
<p>Enter a file description</p>
<input id="attachment" asp-for="@Model.aIssueAttachmentDescription" class="form-control" />
<span asp-validation-for="@Model.aIssueAttachmentDescription" class="text-danger"></span>
<input id="issueid" type="hidden" asp-for="@Model.issueId" class="form-control" value="@ViewBag.id" />
</div>
<!--Modal Footer Start-->
<div class="modal-footer">
@*<button type="submit" class="btn btn-success fileuploadmodal" data-save="modal">Upload</button>*@
<button data-dismiss="modal" id="cancel" class="btn btn-default" type="button">Cancel</button>
<input type="submit" class="btn btn-success realative" id="btnSubmit" data-save="modal" value="Upload">
</div>
<div class="row">
</div>
</div> <!--Modal Footer End-->
</form>
</div>
<script type="text/javascript">
$(function () {
});
</script>
With the word "relative" misspelled, the file information is being sent to the action in the controller(see below). My guess is the Javscript isn't catching the click action ($('body').on('click', '.relative', function (e)). When I spell "relative" correctly the file information is NULL:
public async Task<IActionResult> FileUpload(IFormFile file, IFormCollection collection)
{ //do something
}
What needs to change with the Javascript (or my form/controller) to get the file information? In both cases the collection information is being passed. Is there a way to get the file information added to the collection?
--------- More Info based on @Rena answer Let me expand some more on the original code and how this works. I have a page that has a modal section that will be populated with different partial views depending upon what I want displayed in the modal. On the Main page it has the following Javascript section:
<script>
$('body').on('click', '.modal-link', function () {
var actionUrl = $(this).attr('href');
$.get(actionUrl).done(function (data) {
$('body').find('.modal-content').html(data);
});
$(this).attr('data-target', '#modal-container');
$(this).attr('data-toggle', 'modal');
});
$('body').on('click', '.relative', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
var dataToSend = form.serialize();
$.post(actionUrl, dataToSend).done(function (data) {
$('body').find('.modal-content').html(data);
var isValid = $('body').find('[name="IsValid"]').val() == 'True';
if (isValid) {
$('body').find('#modal-container').modal('hide');
window.location.href = "/Issue/Edit";
}
});
})
$('body').on('click', '.close', function () {
$('body').find('#modal-container').modal('hide');
});
$('#CancelModal').on('click', function () {
return false;
});
$("form").submit(function () {
if ($('form').valid()) {
$("input").removeAttr("disabled");
}
});
</script>
I took what was provided by @Rena and inserted it into this section, but found that the Modal wouldn't close (although the data from the form in the partial view was now getting passed). I tried changing the.realative to another value on both the partial view and the javascript, but it made no difference. I then tried what @mj313 suggested in the preceding posts by changing the provided script like this to redirect to /Issue/Edit but that didn't work either.:
}).done((response, textStatus, xhr) => {
$('body').find('.modal-content').html(data);
var isValid = $('body').find('[name="IsValid"]').val() == 'True';
if (isValid) {
$('body').find('#modal-container').modal('hide');
window.location.href = "/Issue/Edit";
}
});
So while I can now pass data I can't close the Modal.
Here is a slimmed down version of the Edit page where all of this starts
@model MYAPP.ViewModels.IssueViewModel
@{
ViewData["Title"] = "Issue Detail Page";
}
<script type="text/javascript">
$(document).ready(function () {
$("#UploadSection").load("/Attachment/GetAttachments/" + @Model.IssueData.issueId);
});
$(function () {
//Some code
});
function onSelectChange(element) {
//Some code
}
</script>
<div asp-validation-summary="All" class="text-danger"></div>
<hr />
<div class="row">
<div>
<form asp-action="Edit">
<input type="hidden" asp-for="IssueData.issueId" />
@*Some Code*@
@*Placeholder for Modal Pop-up*@
<div id="modal-container" class="modal fade" tabindex="-1">
<div class="modal-dialog modal-lg">
<div class="modal-content">
</div>
</div>
</div>
@*This table contains the first control that generates a modal which contains the _CreateEdit.cshtml*@
<table width="100%">
<tr>
<td width="90%" style="padding:5px 5px 0px 5px;background-color:midnightblue;color:white">
<div class="form-group">
<label asp-for="IssueData.issueStatus" class="control-label">Current Issue Status</label>
-
@if (@Model.IssueData.StatusList[0].UpdatedByName != "")
{
<text>Updated by: </text> @Model.IssueData.StatusList[0].UpdatedByName <text> - </text>@Model.IssueData.StatusList[0].StatusDate.Value.ToShortDateString()
}
else
{
<text>Created by: </text> @Model.IssueData.StatusList[0].EnteredByName <text> - </text>@Model.IssueData.StatusList[0].StatusDate.Value.ToShortDateString()
}
</div>
</td>
<td style="background-color: midnightblue; padding-right:5px">
@if (@Model.IssueData.StatusList[0].StatusDate != DateTime.Today)
{
<a href="@Url.Action("CreateEdit", new { controller = "Issue", issueid = Model.IssueData.issueId, addedit = "add" })" class="modal-link btn btn-success">Add New Status</a>
}
else
{
<a href="@Url.Action("CreateEdit", new { controller = "Issue", issueid = Model.IssueData.issueId, addedit = "edit" })"
class="modal-link btn btn-success">Edit Current Status</a>
}
</td>
</tr>
</table>
<br />
@*This table contains the second control that generates a modal which contains the _UploadFile.cshtml*@
<table id="upload" width="100%">
<tr>
<td width="90%" style="padding:5px 5px 0px 5px;background-color:midnightblue;color:white">
<label class="control-label">Upload Attachments</label>
</td>
<td style="background-color: midnightblue; padding-right:5px">
<a href="@Url.Action("FileUpload", new { controller = "Attachment", issueid = Model.IssueData.issueId })"
class="modal-link btn btn-success">Upload Files</a>
</td>
</tr>
</table>
@*This section contains a partial view _DisplayFiles.cshtml. The _DisplayFiles.cshtml has controls that generate 2 more modals. The modals contain either the
_DeleteFile.cshtml or _EditFile.cshtml partial views*@
<div id="UploadSection"></div>
@{
await Html.RenderPartialAsync("_DisplayFiles");
}
<div class="form-group">
<input type="submit" value="Save Changes" class="btn btn-primary" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
<script>
//Using this to scroll the page on the close of the modal/page refresh
$(document).ready(function () {
var JumpTo = '@ViewBag.JumpToDivId';
if (JumpTo != "") {
$(this).scrollTop($('#' + JumpTo).position().top);
}
});
//Using this to Capture the click that opens the modals
$('body').on('click', '.modal-link', function () {
var actionUrl = $(this).attr('href');
$.get(actionUrl).done(function (data) {
$('body').find('.modal-content').html(data);
});
$(this).attr('data-target', '#modal-container');
$(this).attr('data-toggle', 'modal');
});
//Using this to Capture the click that Submits the _EditFile,_DeleteFile,_CreateEdit forms on the modal
$('body').on('click', '.relative', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
var dataToSend = form.serialize();
$.post(actionUrl, dataToSend).done(function (data) {
$('body').find('.modal-content').html(data);
var isValid = $('body').find('[name="IsValid"]').val() == 'True';
var issueid = "";
issueid = $('body').find('[name="issueidSaved"]').val();
var jumpto = $('body').find('[name="jumpto"]').val();
if (isValid) {
$('body').find('#modal-container').modal('hide');
if (issueid == "")
{
window.location.href = "/Issue/Edit/?id=" + issueid + "&jumpto=" + jumpto;
}
}
});
})
//Using this to Capture the click that Submits the _UploadFile form on the modal
$(function () {
$('body').on('click', '.fileupload', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
var fdata = new FormData();
$('input[name="file"]').each(function (a, b) {
var fileInput = $('input[name="file"]')[a];
if (fileInput.files.length > 0) {
var file = fileInput.files[0];
fdata.append("file", file);
}
});
$("form input[type='text']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$("form input[type='hidden']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$.ajax({
url: actionUrl,
method: "POST",
contentType: false,
processData: false,
data: fdata
}).done((response, textStatus, xhr) => {
var isValid = $(response).find('[name="IsValid"]').val() == 'True';
var issueid = $(response).find('[name="issueidSaved"]').val();
var jumpto = $(response).find('[name="jumpto"]').val();
if (isValid) {
$('body').find('#modal-container').modal('hide');
window.location.href = "/Issue/Edit/?id=" + issueid + "&jumpto="+jumpto;
}
});
})
});
$('body').on('click', '.close', function () {
$('body').find('#modal-container').modal('hide');
});
$('#CancelModal').on('click', function () {
return false;
});
$("form").submit(function () {
if ($('form').valid()) {
$("input").removeAttr("disabled");
}
});
</script>
}
Here is the code for _UpdateFile.cshtml
@model MYAPP.Models.AttachmentModel
<!--Modal Body Start-->
<div class="modal-content">
<input name="IsValid" type="hidden" value="@ViewData.ModelState.IsValid.ToString()" />
<input name="issueidSaved" type="hidden" value="@ViewBag.ID" />
<input name="jumpto" type="hidden" value="@ViewBag.JumpToDivId" />
<!--Modal Header Start-->
<div class="modal-header">
<h4 class="modal-title">Upload File</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
</div>
<!--Modal Header End-->
<form asp-action="FileUpload" method="post" enctype="multipart/form-data" asp-controller="Attachment">
@Html.AntiForgeryToken()
<div class="modal-body form-horizontal">
<div>
<p>Upload a file using this form:</p>
<input type="file" name="file" />
<span asp-validation-for="@Model.aFileData" class="text-danger"></span>
</div>
<div>
<p>Enter a file description</p>
<input id="attachment" asp-for="@Model.aIssueAttachmentDescription" class="form-control" />
<span asp-validation-for="@Model.aIssueAttachmentDescription" class="text-danger"></span>
<input id="issueid" type="hidden" asp-for="@Model.issueId" class="form-control" value="@ViewBag.id" />
</div>
<!--Modal Footer Start-->
<div class="modal-footer">
@*<button type="submit" class="btn btn-success fileuploadmodal" data-save="modal">Upload</button>*@
<button data-dismiss="modal" id="cancel" class="btn btn-default" type="button">Cancel</button>
<input type="submit" class="btn btn-success fileupload" id="btnSubmit" data-save="modal" value="Upload">
</div>
<div class="row">
</div>
</div> <!--Modal Footer End-->
</form>
</div>
<script type="text/javascript">
$(function () {
});
</script>
<!--Modal Body End-->
Here is the code for the file Upload
[HttpPost]
public async Task<IActionResult> FileUpload(IFormFile file, IFormCollection collection)
{
if (file == null)
{
ModelState.AddModelError("aFileData", "Please select a file.");
}
if (collection["aIssueAttachmentDescription"] == "")
{
ModelState.AddModelError("aIssueAttachmentDescription", "Please provide a description for the file.");
}
if (!ModelState.IsValid)
{
return PartialView("_UploadFile");
}
var formFileContent =
await FileHelpers.ProcessFormFile<BufferedSingleFileUploadDb>(
file, ModelState, _permittedExtensions,
_fileSizeLimit);
var thefile = new AttachmentModel
{
aFileData = formFileContent,
aFileName = file.FileName,
aIssueAttachmentDescription = collection["aIssueAttachmentDescription"],
aFileSize = file.Length,
aFileType=file.ContentType,
issueId = collection["issueId"]
};
string result = _adoSqlService.InsertFile(thefile);
ViewBag.ID = collection["issueId"];
ViewBag.JumpToDivId = "upload";
return PartialView("_UploadFile");
}
You can see in the code above that I add in model errors if the file is not selected or the description is not filled in. These are not being shown.
I can live with the collection returning the entire Edit forms data, but it should only return the fields on the _UploadFile.cshtml form (aIssueAttachmentDescription, issueId)它应该只返回 _UploadFile.cshtml 表单上的字段（aIssueAttachmentDescription，issueId）
Anything you can provide that fixes the display of the model errors as well as a way to simplify my code would be greatly appreciated.
1 answers
solution1
0 2020-10-28 02:58:40
With the word "relative" misspelled, the file information is being sent to the action in the controller(see below). My guess is the Javscript isn't catching the click action ($('body').on('click', '.relative', function (e)). When I spell "relative" correctly the file information is NULL
The <input type="submit"> defines a submit button which submits all form values to a form-handler.So although you misspelled the word,it also could submit to the action successfully by default.
For how to use ajax to pass form data with file,you could follow:
@model Mvc3_0.Controllers.HomeController.AttachmentModel
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<!--Modal Body Start-->
<div class="modal-content">
<input name="IsValid" type="hidden" value="@ViewData.ModelState.IsValid.ToString()" />
<!--Modal Header Start-->
<div class="modal-header">
<h4 class="modal-title">Upload File</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
</div>
<!--Modal Header End-->
<form asp-action="FileUpload" method="post" enctype="multipart/form-data" asp-controller="Attachment">
@Html.AntiForgeryToken()
<div class="modal-body form-horizontal">
<div>
<p>Upload a file using this form:</p>
<input type="file" name="file" />
<span asp-validation-for="@Model.aFileData" class="text-danger"></span>
</div>
<div>
<p>Enter a file description</p>
<input id="attachment" asp-for="@Model.aIssueAttachmentDescription" class="form-control" />
<span asp-validation-for="@Model.aIssueAttachmentDescription" class="text-danger"></span>
<input id="issueid" type="hidden" asp-for="@Model.issueId" class="form-control" value="@ViewBag.id" />
</div>
<!--Modal Footer Start-->
<div class="modal-footer">
@*<button type="submit" class="btn btn-success fileuploadmodal" data-save="modal">Upload</button>*@
<button data-dismiss="modal" id="cancel" class="btn btn-default" type="button">Cancel</button>
<input type="submit" class="btn btn-success realative" id="btnSubmit" data-save="modal" value="Upload">
</div>
<div class="row">
</div>
</div> <!--Modal Footer End-->
</form>
</div>
</div>
</div>
@section Scripts
{
<script type="text/javascript">
$(function () {
$('body').on('click', '.realative', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
var fdata = new FormData();
$('input[name="file"]').each(function (a, b) {
var fileInput = $('input[name="file"]')[a];
if (fileInput.files.length > 0) {
var file = fileInput.files[0];
fdata.append("file", file);
}
});
$("form input[type='text']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$("form input[type='hidden']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$.ajax({
url: actionUrl,
method: "POST",
contentType: false,
processData: false,
data: fdata
}).done((response, textStatus, xhr) => {
$("#exampleModal").modal('hide'); //update here...
});
})
});
</script>
}
Update1:
.done((response, textStatus, xhr) => {
$("#exampleModal").modal('hide'); //update here...
});
Update2:
By using your code,I find that you add the modal html in a form which is in the main page.This will cause the form in modal which is in _UploadFile.cshtml could not generate well in my project.Here is the whole working demo:
Main Page:
@model AttachmentModel
<div class="row">
<div>
//change here.....
<div id="modal-container" class="modal fade" tabindex="-1">
<div class="modal-dialog modal-lg">
<div class="modal-content">
</div>
</div>
</div>
<form asp-action="Edit">
<br />
@*This table contains the second control that generates a modal which contains the _UploadFile.cshtml*@
<table id="upload" width="100%">
<tr>
<td width="90%" style="padding:5px 5px 0px 5px;background-color:midnightblue;color:white">
<label class="control-label">Upload Attachments</label>
</td>
<td style="background-color: midnightblue; padding-right:5px">
<a href="@Url.Action("FileUpload", new { controller = "Attachment", issueid = "1" })"
class="modal-link btn btn-success">Upload Files</a>
</td>
</tr>
</table>
<div class="form-group">
<input type="submit" value="Save Changes" class="btn btn-primary" />
</div>
</form>
</div>
</div>
Js in Main Page:
@section Scripts
{
<script type="text/javascript">
$(function () {
$('body').on('click', '.modal-link', function () {
var actionUrl = $(this).attr('href');
$.get(actionUrl).done(function (data) {
$('body').find('.modal-content').html(data);
});
$(this).attr('data-target', '#modal-container');
$(this).attr('data-toggle', 'modal');
});
$('body').on('click', '.fileupload', function (e) {
e.preventDefault();
var form = $(this).parents('.modal').find('form');
var actionUrl = form.attr('action');
console.log(actionUrl);
var fdata = new FormData();
$('input[name="file"]').each(function (a, b) {
var fileInput = $('input[name="file"]')[a];
if (fileInput.files.length > 0) {
var file = fileInput.files[0];
fdata.append("file", file);
}
});
$("form input[type='text']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$("form input[type='hidden']").each(function (x, y) {
fdata.append($(y).attr("name"), $(y).val());
});
$.ajax({
url: actionUrl,
method: "POST",
contentType: false,
processData: false,
data: fdata
})
.done((response, textStatus, xhr) => {
var isValid = $(response).find('[name="IsValid"]').val() == 'True';
var issueid = $(response).find('[name="issueidSaved"]').val();
var jumpto = $(response).find('[name="jumpto"]').val();
if (isValid) {
$('body').find('#modal-container').modal('hide');
}
});
})
})
</script>
}
_UploadFile.cshtml:
@model AttachmentModel
<div class="modal-content">
<input name="IsValid" type="hidden" value="@ViewData.ModelState.IsValid.ToString()" />
<input name="issueidSaved" type="hidden" value="@ViewBag.ID" />
<input name="jumpto" type="hidden" value="@ViewBag.JumpToDivId" />
<!--Modal Header Start-->
<div class="modal-header">
<h4 class="modal-title">Upload File</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
</div>
<!--Modal Header End-->
<form asp-action="FileUpload" method="post" enctype="multipart/form-data" asp-controller="Home">
@Html.AntiForgeryToken()
<div class="modal-body form-horizontal">
<div>
<p>Upload a file using this form:</p>
<input type="file" name="file" />
<span asp-validation-for="@Model.aFileData" class="text-danger"></span>
</div>
<div>
<p>Enter a file description</p>
<input id="attachment" asp-for="@Model.aIssueAttachmentDescription" class="form-control" />
<span asp-validation-for="@Model.aIssueAttachmentDescription" class="text-danger"></span>
<input id="issueid" type="hidden" asp-for="@Model.issueId" class="form-control" value="@ViewBag.id" />
</div>
<!--Modal Footer Start-->
<div class="modal-footer">
@*<button type="submit" class="btn btn-success fileuploadmodal" data-save="modal">Upload</button>*@
<button data-dismiss="modal" id="cancel" class="btn btn-default" type="button">Cancel</button>
<input type="submit" class="btn btn-success fileupload" id="btnSubmit" data-save="modal" value="Upload">
</div>
<div class="row">
</div>
</div> <!--Modal Footer End-->
</form>
</div>
Controller:
[HttpPost]
public async Task<IActionResult> FileUpload(IFormFile file, IFormCollection collection)
{
var thefile = new AttachmentModel
{
aFileData = "asdad",
aIssueAttachmentDescription = collection["aIssueAttachmentDescription"],
issueId = collection["issueId"]
};
ViewBag.ID = collection["issueId"];
ViewBag.JumpToDivId = "upload";
return PartialView("_UploadFile");
}
Result:
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