asp.net-mvc - 如何覆盖 @Html.LabelFor 模板？

Question

我有一个简单的字段表单

<div class="field fade-label">
    @Html.LabelFor(model => model.Register.UserName)
    @Html.TextBoxFor(model => model.Register.UserName)
</div>

结果是:

<div class="field fade-label">
    <label for="Register_UserName">Username (used to identify all services, from 4 to 30 chars)</label>
    <input type="text" value="" name="Register.UserName" id="Register_UserName">
</div>

但我想要那个LabelFor代码附加 <span>在里面，这样我最终可以得到:

<label for="Register_UserName">
    <span>Username (used to identify all services, from 4 to 30 chars)</span>
</label>

我该怎么做？

全部examples使用EditorTemplates但这是LabelFor .

Answer 1

您可以通过创建自己的 HTML 帮助器来完成此操作。

http://www.asp.net/mvc/tutorials/creating-custom-html-helpers-cs

您可以通过下载 ASP.Net MVC 源代码来查看 LabelFor<> 的代码，并将其修改为自定义帮助程序。

<小时/>

答案由 balexandre 添加

public static class LabelExtensions
{
    public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, object htmlAttributes)
    {
        return LabelFor(html, expression, new RouteValueDictionary(htmlAttributes));
    }
    public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, IDictionary<string, object> htmlAttributes)
    {
        ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
        string htmlFieldName = ExpressionHelper.GetExpressionText(expression);
        string labelText = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
        if (String.IsNullOrEmpty(labelText))
        {
            return MvcHtmlString.Empty;
        }

        TagBuilder tag = new TagBuilder("label");
        tag.MergeAttributes(htmlAttributes);
        tag.Attributes.Add("for", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));

        TagBuilder span = new TagBuilder("span");
        span.SetInnerText(labelText);

        // assign <span> to <label> inner html
        tag.InnerHtml = span.ToString(TagRenderMode.Normal);

        return MvcHtmlString.Create(tag.ToString(TagRenderMode.Normal));
    }
}