What I did was to modify the jquery.validate.unobtrusive JS file to add a second container, specifically for your images, if there is a validation error.
var container2 = $(this).find("[data-valimg-for='" + escapeAttributeValue(inputElement[0].name) + "']"),
replace = $.parseJSON(container.attr("data-valimg-replace")) !== false;
container2.removeClass("img-validation-valid").addClass("img-validation-error");
Then don't forget to bind it to the model:
error.data("unobtrusiveContainer", container2);
Finally, empty it in the if (replace) code block:
if (replace) {
container.empty();
container2.empty();
error.removeClass("input-validation-error").appendTo(container);
}
else {
error.hide();
}
On success, remember to hide it:
var container2 = error.data("unobtrusiveContainer"),
replace = $.parseJSON(container.attr("data-valimg-replace"));
if (container2) {
container2.addClass("img-validation-valid").removeClass("img-validation-error");
error.removeData("unobtrusiveContainer");
if (replace) {
container2.empty();
}
}
If you take a look at the onError and onSuccess functions in the file, you should be able to find out where you can put them in.
In your view, add the following line of code to each form input there's validation for:
<img class="img-validation-valid" data-valimg-replace="true" data-valimg-for="<replace with field name here, ie. Name>" src="required.png" />
I've only tested this with the [Required]
attribute, but it works. I'm also pretty sure you can use this for generating other stuff as well, not just images.