如何在C＃中更改擴展方法

Question

我開始使用我在網上找到的這個擴展：

public static class NewLabelExtensions
    {
        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)
        {
            var metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
            var htmlFieldName = ExpressionHelper.GetExpressionText(expression);
            var labelText = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
            if (String.IsNullOrEmpty(labelText))
            {
                return MvcHtmlString.Empty;
            }

            var tag = new TagBuilder("label");
            tag.MergeAttributes(htmlAttributes);
            tag.Attributes.Add("for", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));
            tag.SetInnerText(labelText);
            return MvcHtmlString.Create(tag.ToString(TagRenderMode.Normal));
        }
    } 

我這樣使用它：

@Html.LabelFor(m => m.Login.RememberMe, new { @class = "adm" })

結果是這樣的：

<label class="adm" for="Login_RememberMe">Remember me?</label>

不過我想要這個標簽的樣式。 我真的不明白我正在使用的代碼。 任何人都可以建議更改上面的代碼，使LabelFor方法生成？

<label class="adm" id="Login_RememberMe" for="Login_RememberMe">Remember me?</label>

謝謝

Answer 1

你只需要添加以下行：

 tag.Attributes.Add("id", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));

碼：

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

        var tag = new TagBuilder("label");
        tag.MergeAttributes(htmlAttributes);
        tag.Attributes.Add("id", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));
        tag.Attributes.Add("for", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));
        tag.SetInnerText(labelText);
        return MvcHtmlString.Create(tag.ToString(TagRenderMode.Normal));
    }