问题
I am trying to upload Image using Ajax method in asp.net core Razor pages, I am main form in will all input fields are kept and with the form for Fileupload i am also added addition button which is for file upload using Ajax, When i hit the
<input type="submit" value="Upload Image" asp-page-handler="OnPostUploadImage" id="btnUploadImage" />
i want it to call OnPostUploadImage
method in pageModel file but it alway goes to default OnPost
method. when i rename the OnPost
to OnPost2
nothing happend..
How can i call OnPostUploadImage()
on button btnUploadImage
click event.
When i hit click btnUploadImage
it generates following error on browser console
Error in FF
XML Parsing Error: no root element found Location: https://localhost:44364/Admin/News/NewsCreate?handler=OnPostUploadImage Line Number 1, Column 1:
Error in Chrome
jquery.min.js:2 POST https://localhost:44364/Admin/News/NewsCreateMultipleSubmit?handler=OnPostUpLoadImage 400 (Bad Request)
event though path looks fine but it cant find it as per error message
@page
@model BookListRazor.Pages.Admin.News.NewsCreateModel
@{
ViewData["Title"] = "News Create";
Layout = "~/Pages/Shared/_LayoutAdmin.cshtml";
}
<div class="border container" style="padding:30px;">
<form method="post" enctype="multipart/form-data">
<div class="text-danger" asp-validation-summary="ModelOnly"></div>
<input hidden asp-for="News.NewsImage" />
<input id="fileName" hidden value="" />
<div class="form-group row">
<div class="col-2">
<label asp-for="News.NewsHeading"></label>
</div>
<div class="col-10">
<input asp-for="News.NewsHeading" class="form-control" />
</div>
<span asp-validation-for="News.NewsHeading" class="text-danger"></span>
</div>
<div class="form-group row">
<div class="col-2">
<label asp-for="News.NewsImage"></label>
</div>
<div class="col-10">
@*<input asp-for="News.NewsImage" type="file" class="form-control" id="NewsImage">*@
@*Photo property type is IFormFile, so ASP.NET Core automatically creates a FileUpload control *@
<div class="custom-file">
<input asp-for="NewsImageForUpload" class="custom-file-input form-control">
<label class="custom-file-label">Click here to change photo</label>
<input type="submit" value="Upload Image" asp-page-handler="OnPostUploadImage" id="btnUploadImage" />
</div>
</div>
<span id="imageStatus" class="text-danger"></span>
<span asp-validation-for="NewsImageForUpload" class="text-danger"></span>
</div>
<div class="form-group row">
<div class="col-3 offset-3">
<input id="btnSave" type="submit" value="Create" class="btn btn-primary form-control" />
</div>
<div class="col-3">
<a asp-page="Index" class="btn btn-success form-control">Back to List</a>
</div>
</div>
</form>
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="https://cdn.ckeditor.com/4.14.0/full/ckeditor.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<script>
$(document).ready(function () {
$("#btnSave").addClass("disable-button");
$('.custom-file-input').on("change", function () {
var fileName = $(this).val().split("\\").pop();
$(this).next('.custom-file-label').html(fileName);
$("#fileName").val(fileName);
$("#btnSave").removeClass("disable-button");
});
if ($("#fileName").val() == "") {
//alert("Select Image...");;
}
});
</script>
</div>
@section Scripts{
<partial name="_ValidationScriptsPartial" />
<script>
$(function () {
$('#btnUploadImage').on('click', function (evt) {
console.log("btnUploadImage");
evt.preventDefault();
console.log("btnUploadImage after evt.preventDefault()");
$.ajax({
url: '@Url.Page("", "OnPostUploadImage")',
//data: new FormData(document.forms[0]),
contentType: false,
processData: false,
type: 'post',
success: function () {
alert('Uploaded by jQuery');
}
});
});
});
</script>
}
.cs file CODE
public async Task<IActionResult> OnPost()
{
if (ModelState.IsValid)
{
return Page();
}
else
{
return Page();
}
}
public IActionResult OnPostUploadImage()
{
//Some code here
}
回答1:
400 error because Razor Pages are designed to be automatically protected from cross-site request forgery (CSRF/XSRF) attacks. You don’t have to write any additional code. Antiforgery token generation and validation is automatically included in Razor Pages since i notice you have add FormTagHelper on page . So just modify your ajax to include token in header :
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
And configure the antiforgery service to look for the X-CSRF-TOKEN header :
services.AddAntiforgery(o => o.HeaderName = "XSRF-TOKEN");
Below article is for your reference :
Handle Ajax Requests in ASP.NET Core Razor Pages
And to post to OnPostUploadImage function in ajax , modify url to @Url.Page("", "UploadImage")
:
$.ajax({
url: '@Url.Page("", "UploadImage")',
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
contentType: false,
processData: false,
type: 'post',
success: function () {
alert('Uploaded by jQuery');
}
});
来源:https://stackoverflow.com/questions/61223339/multiple-submit-buttons-in-razor-pages-not-able-to-find-handler-pagenamehandler