C# 如何在 ASP.NET MVC 中的验证消息中呈现 html？
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How can I render html in validation message in ASP.NET MVC?
提问by Dmytro
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:
我目前正在开发一个注册页面。当用户已经存在时，我想在电子邮件字段的错误消息中为用户提供登录和重置密码链接。在控制器中，我有：
[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:
但是当我尝试输出这条消息时，我没有得到我所期望的。我得到像纯文本一样的 html 标记。我已经试过了：
@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>
}
采纳答案by Brett
@Html.Raw(HttpUtility.HtmlDecode(Html.ValidationMessageFor(m => m.Email).ToHtmlString()))
Isn't pretty though
虽然不漂亮
回答by galbani
Read this post for evaluate errors
阅读这篇文章以评估错误
How to add validation errors in the validation collection asp.net mvc?
In your view
在你看来
Html.ValidationMessage("Email")
Html.ValidationMessage("电子邮件")
回答by Steviebob
Found this post while figuring this out myself using ASP.NET Core.
在自己使用 ASP.NET Core 解决这个问题时发现了这篇文章。
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:
我最终做的是在 modelstate.AddError() 中添加我的验证消息部分，并分别向 ViewData 添加具有我想要呈现的 Html 的位，如下所示：
ViewData["myKey"]= "My html";
ViewData["myKey"]="我的 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.
感觉很丑陋，可能有更好的方法来做到这一点，但对于我非常有限的需求，这非常符合要求。
