public static LiteralTag ValidationMessage <TModel, TProperty>(this IHtmlHelper <TModel> htmlHelper, Expression <Func <TModel, TProperty> > expression, string message)
{
var reqName = RequestData.GetName(ReflectionHelper.GetAccessor(expression));
var errors = htmlHelper.ViewData.ModelState.ContainsKey(reqName) && htmlHelper.ViewData.ModelState[reqName].Errors.Any();
var val = HtmlHelperValidationExtensions.ValidationMessage(htmlHelper, reqName, message, errors ? new { role = "alert" } : null);
if (val != null)
{
var sb = new StringBuilder();
using (var stringWriter = new StringWriter(sb))
val.WriteTo(stringWriter, HtmlEncoder.Default);
return(new LiteralTag(sb.ToString()));
}
return(new LiteralTag(""));
}
