我如何prevent MVC3 HTML逃避我的验证消息? [英] How do I prevent MVC3 html escaping my validation messages?
问题描述
我试图输出MVC3其中包含一个链接验证消息。
我在输出错误信息占位这样
@ Html.ValidationMessageFor(型号=> model.Email)
问题是,该错误信息是HTML逃脱这是很好的大部分时间,但我想一个链接到在中间。
<跨度类=现场验证错误数据valmsg换=电子邮件数据valmsg替换=真>这E-mail地址是已经临时用户。 &放大器; LT; A HREF =安培; QUOT;%url_token%放大器; QUOT;&安培; gt;点击这里重设和放大器; LT; / A&放大器; GT;< / SPAN>
我如何prevent这种情况发生?
这工作,但不是一个解决方案,而是一个临时的变通。
@ {
字符串s = Html.ValidationMessageFor(型号=> model.Email)的ToString();
}
@ Html.Raw(HttpUtility.HtmlDe code(S))
考虑@ BrunoLM的带领下,下面的扩展方法应该给你你需要什么。我只是做了这个基本的测试,但它确实工作。
公共静态类HtmlHelperExtensions
{
私人静态只读字符串htmlErrorPlaceholder =## __ HTML#错误#占位符__ ##; 公共静态IHtmlString HtmlValidationMessageFor<的TModel,TProperty>(
这与的HtmlHelper LT;的TModel>的HtmlHelper,
防爆pression<&Func键LT;的TModel,TProperty>>前pression,
对象htmlAttributes)
{
变量名称=前pression.GetMemberName();
VAR isInError = htmlHelper.ViewContext.ViewData.ModelState.ContainsKey(名);
VAR消息= htmlHelper.ValidationMessageFor(如pression,htmlErrorPlaceholder,htmlAttributes);
如果(isInError&安培;&安培;!MvcHtmlString.IsNullOrEmpty(消息))
{
VAR realError = htmlHelper.ViewContext.ViewData.ModelState [名] .Errors.First()的ErrorMessage。
返回htmlHelper.Raw(message.ToString()更换(htmlErrorPlaceholder,realError));
} 返回MvcHtmlString.Empty;
}
}公共静态类防爆pression_1Extensions
{
公共静态字符串GetMemberName<的TModel,TProperty>(此例pression<&Func键LT;的TModel,TProperty>>前pression)
{
开关(如pression.Body.NodeType)
{
案例防爆pressionType.MemberAccess:
MemberEx pression memberEx pression =(MemberEx pression)前pression.Body;
返回memberEx pression.Member是的PropertyInfo? memberEx pression.Member.Name:空;
} 抛出新NotSupportedException异常();
}
}
I'm trying to output a validation message in MVC3 which contains a link.
I'm outputting the error message place holder like this
@Html.ValidationMessageFor(model => model.Email)
The problem is, the error message is html escaped which is fine most times, but I'd like a link to be in the middle.
<span class="field-validation-error" data-valmsg-for="Email" data-valmsg-replace="true">This e-mail address is already registed. <a href="%url_token%">Click here to reset.</a></span>
How do I prevent this from happening?
This works but is not a solution, rather, a temporary work around.
@{
string s = Html.ValidationMessageFor(model => model.Email).ToString();
}
@Html.Raw(HttpUtility.HtmlDecode(s))
Taking @BrunoLM's lead, The following extension methods should give you what you need. I've only done basic testing on this, but it does work.
public static class HtmlHelperExtensions
{
private static readonly string htmlErrorPlaceholder = "##__html#Error#Placeholder__##";
public static IHtmlString HtmlValidationMessageFor<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression,
object htmlAttributes)
{
var name = expression.GetMemberName();
var isInError = htmlHelper.ViewContext.ViewData.ModelState.ContainsKey(name);
var message = htmlHelper.ValidationMessageFor(expression, htmlErrorPlaceholder, htmlAttributes);
if (isInError && !MvcHtmlString.IsNullOrEmpty(message))
{
var realError = htmlHelper.ViewContext.ViewData.ModelState[name].Errors.First().ErrorMessage;
return htmlHelper.Raw(message.ToString().Replace(htmlErrorPlaceholder, realError));
}
return MvcHtmlString.Empty;
}
}
public static class Expression_1Extensions
{
public static string GetMemberName<TModel, TProperty>(this Expression<Func<TModel, TProperty>> expression)
{
switch (expression.Body.NodeType)
{
case ExpressionType.MemberAccess:
MemberExpression memberExpression = (MemberExpression)expression.Body;
return memberExpression.Member is PropertyInfo ? memberExpression.Member.Name : null;
}
throw new NotSupportedException();
}
}
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