ValidateMessageForクラス(MVC4)のオーバーロードを作成しました。
public static MvcHtmlString ValidationMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, bool addRequiredFieldMark)
{
return ValidationMessageFor(htmlHelper, expression, null /* validationMessage */, new RouteValueDictionary(), addRequiredFieldMark: addRequiredFieldMark);
}
public static MvcHtmlString ValidationMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string validationMessage, IDictionary<string, object> htmlAttributes, bool? addRequiredFieldMark=false)
{
return ValidationMessageHelper(htmlHelper,
ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData),
ExpressionHelper.GetExpressionText(expression),
validationMessage,
htmlAttributes,
addRequiredFieldMark:addRequiredFieldMark);
}
private static MvcHtmlString ValidationMessageHelper(this HtmlHelper htmlHelper, ModelMetadata modelMetadata, string expression, string validationMessage, IDictionary<string, object> htmlAttributes, bool? addRequiredFieldMark = false)
{
string modelName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(expression);
//Changed (http://stackoverflow.com/questions/8380988/how-to-customize-html-validationmessagefor-in-asp-mvc).
//FormContext formContext = htmlHelper.ViewContext.GetFormContextForClientValidation();
FormContext formContext = htmlHelper.ViewContext.ClientValidationEnabled ? htmlHelper.ViewContext.FormContext : null;
if (!htmlHelper.ViewData.ModelState.ContainsKey(modelName) && formContext == null)
{
return null;
}
ModelState modelState = htmlHelper.ViewData.ModelState[modelName];
ModelErrorCollection modelErrors = (modelState == null) ? null : modelState.Errors;
ModelError modelError = (((modelErrors == null) || (modelErrors.Count == 0)) ? null : modelErrors.FirstOrDefault(m => !String.IsNullOrEmpty(m.ErrorMessage)) ?? modelErrors[0]);
if (modelError == null && formContext == null)
{
return null;
}
TagBuilder builder = new TagBuilder("span");
builder.MergeAttributes(htmlAttributes);
builder.AddCssClass((modelError != null) ? HtmlHelper.ValidationMessageCssClassName : HtmlHelper.ValidationMessageValidCssClassName);
if (!String.IsNullOrEmpty(validationMessage))
{
builder.SetInnerText(validationMessage);
}
else if (modelError != null)
{
builder.SetInnerText(GetUserErrorMessageOrDefault(htmlHelper.ViewContext.HttpContext, modelError, modelState));
}
if (formContext != null)
{
bool replaceValidationMessageContents = String.IsNullOrEmpty(validationMessage);
// Addition
if (modelMetadata != null && modelMetadata.IsRequired && addRequiredFieldMark.HasValue && addRequiredFieldMark.Value)
builder.SetInnerText("*");
if (htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
{
builder.MergeAttribute("data-valmsg-for", modelName);
builder.MergeAttribute("data-valmsg-replace", replaceValidationMessageContents.ToString().ToLowerInvariant());
}
else
{
FieldValidationMetadata fieldMetadata = ApplyFieldValidationMetadata(htmlHelper, modelMetadata, modelName);
// rules will already have been written to the metadata object
fieldMetadata.ReplaceValidationMessageContents = replaceValidationMessageContents; // only replace contents if no explicit message was specified
// client validation always requires an ID
builder.GenerateId(modelName + "_validationMessage");
fieldMetadata.ValidationMessageId = builder.Attributes["id"];
}
}
return MvcHtmlString.Create(builder.ToString(TagRenderMode.Normal));
}
だからこれは追加です:
if (modelMetadata != null && modelMetadata.IsRequired && addRequiredFieldMark.HasValue && addRequiredFieldMark.Value)
builder.SetInnerText("*");
そして、このかみそり/ cshtmlコード:
<div class="item">
@Html.LabelFor(m => m.Contact.LastName, new { @class="l" } )
<div class="input">@Html.EditorFor(m => m.Contact.LastName, new { @class="i" })</div>
<div class="marker">@Html.ValidationMessageFor(model => model.Contact.LastName,true)</div>
<div class="clear"></div>
</div>
(本当のキーワードを気に)