c# - htmlAttributes 未与我的扩展中的标签生成器合并

Question

我正在做扩展。

public static MvcHtmlString Image(this HtmlHelper helper, string src, object htmlAttributes = null)
{
    TagBuilder builder = new TagBuilder("img");
    builder.MergeAttribute("src", src);
    if (htmlAttributes != null) builder.MergeAttributes(htmlAttributes);
    return MvcHtmlString.Create(builder.ToString(TagRenderMode.SelfClosing));
}

这一行:

if (htmlAttributes != null) builder.MergeAttributes(htmlAttributes);

错误:

The type arguments for method 'System.Web.Mvc.TagBuilder.MergeAttributes<TKey,TValue>(System.Collections.Generic.IDictionary<TKey,TValue>)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

我试过:

if (htmlAttributes != null) builder.MergeAttributes((Dictionary<string, string>)htmlAttributes);

和

if (htmlAttributes != null) builder.MergeAttributes((Dictionary<string, object>)htmlAttributes);

我怎样才能让它工作？

Answer 1

最好使用 HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes) 而不是新的 RouteValueDictionary(htmlAttributes) 因为它支持用下划线拼写的数据破折号属性(例如 data_click)并且有不直接依赖于 RouteValueDictionary。