How can I render html in validation message in ASP.NET MVC?

Question

I am currently developing a registration page. When user already exists I want to provide login and reset password links for user in error message for email field. In controller I have:

[HttpPost] public ActionResult Register(RegistrationModel registration) {   ...    if(userExists)   {       const string errorMessage = "User already exist. You can <a href="/account/login">login</a> ...";       ModelState.AddModelError("Email", errorMessage);       return View("Register", registration);   } } 

But when I try to output this message in view I do not get what I expect. I get html markup like plain text. I've already tried:

@using(Html.BeginForm()) { <div>@Html.TextBoxFor(m => m.Email)             @{    @Html.ValidationMessageFor(m => m.Email)     ...     @Html.Raw(Html.ValidationMessageFor(m => m.Email))     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToString();    @Html.Raw(validationMessage)     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToHtmlString();    @Html.Raw(validationMessage)     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToString();    @(new HtmlString(validationMessage))     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToHtmlString();    @(new HtmlString(validationMessage))     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToString();    @(new MvcHtmlString(validationMessage))     ...     string validationMessage = Html.ValidationMessageFor(m => m.Email).ToHtmlString();    @(new MvcHtmlString(validationMessage))  } </div> } 

Answer 1

@Html.Raw(HttpUtility.HtmlDecode(Html.ValidationMessageFor(m => m.Email).ToHtmlString())) 

Isn't pretty though

Answer 2

Found this post while figuring this out myself using ASP.NET Core.

What I ended up doing was adding my part of my validation message in modelstate.AddError(), and separately adding to ViewData the bit that had the Html I wanted to render, like so:

ViewData["myKey"]= "My html";

It feels pretty ugly and there's probably better ways of doing it, but for my very limited needs, this fit the bill nicely.