Asp.net mvc 3 validation summary not showing via unobtrusive validation

asp.net-mvc-3unobtrusive-validation

I'm having problems getting the asp.net MVC client-side validation to work how I want it.

I have it basically working, however, the validation summary is not displayed until the user clicks the submit button, even though the individual inputs are being highlighted as invalid as the user tabs/clicks etc their way through the form. This is all happening client-side.

I would have thought the that the validation summary would be displayed as soon as an input field was discovered that was invalid.

Is this behaviour by design? Is there any way around it, as I would like the validation summary to be displayed as soon as it is discovered that one of the input fields is invalid.

My code is basically,

<script src="@Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.js")" type="text/javascript"></script>
...
    @using (Html.BeginForm())
    {
        @Html.ValidationSummary(false)
        @Html.EditorFor(model => model);   
        ...

And my _Layout.cshtml references jquery-1.4.4.min.js.

Best Answer

I used a version of Torbjörn Nomells answer

Except here I hang resetSummary off the validator object

$.validator.prototype.resetSummary= function () {
    var form = $(this.currentForm);
    form.find("[data-valmsg-summary=true]")
        .removeClass("validation-summary-errors")
        .addClass("validation-summary-valid")
        .find("ul")
        .empty();
    return this;
};

Then change calling it to

$.validator.setDefaults({
    showErrors: function (errorMap, errorList) {
        this.defaultShowErrors();
        this.checkForm();
        if (this.errorList.length) {
            $(this.currentForm).triggerHandler("invalid-form", [this]);
        } else {
            this.resetSummary();
        }
    } 
});

Related Solutions

Asp.net-mvc – How to display MVC 3 client side validation results in validation summary

This article seems to explain how add client side validation summary into the validation summary:

http://geekswithblogs.net/stun/archive/2011/01/28/aspnet-mvc-3-client-side-validation-summary-with-jquery-validation-unobtrusive-javascript.aspx

However I did not test it by myself and it does not seem to have any difference with your code. If it does not work a good point to look might be jquery.validate.unobtrusive.js file on a function that actually places validation errors:

function onErrors(form, validator) {  // 'this' is the form element
    var container = $(this).find("[data-valmsg-summary=true]"),
        list = container.find("ul");

    if (list && list.length && validator.errorList.length) {
        list.empty();
        container.addClass("validation-summary-errors")
          .removeClass("validation-summary-valid");

        $.each(validator.errorList, function () {
            $("<li />").html(this.message).appendTo(list);
        });
    }
}

C# – File Upload ASP.NET MVC 3.0

You don't use a file input control. Server side controls are not used in ASP.NET MVC. Checkout the following blog post which illustrates how to achieve this in ASP.NET MVC.

So you would start by creating an HTML form which would contain a file input:

@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <input type="file" name="file" />
    <input type="submit" value="OK" />
}

and then you would have a controller to handle the upload:

public class HomeController : Controller
{
    // This action renders the form
    public ActionResult Index()
    {
        return View();
    }

    // This action handles the form POST and the upload
    [HttpPost]
    public ActionResult Index(HttpPostedFileBase file)
    {
        // Verify that the user selected a file
        if (file != null && file.ContentLength > 0) 
        {
            // extract only the filename
            var fileName = Path.GetFileName(file.FileName);
            // store the file inside ~/App_Data/uploads folder
            var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
            file.SaveAs(path);
        }
        // redirect back to the index action to show the form once again
        return RedirectToAction("Index");        
    }
}

Related Topic