Passing an object to HTML attributes

Question

This functionality is, surprisingly enough, provided by the RouteValueDictionary class:

IDictionary<string, object> htmlAttributes = new RouteValueDictionary(attrs);

You can then use this dictionary in conjunction with a TagBuilder, which you will probably be using anyway:

var tagBuilder = new TagBuilder("input");
tagBuilder.MergeAttributes(htmlAttributes);
tagBuilder.ToString(TagRenderMode.Normal);

You can see this done in the ASP.NET MVC source code itself; one of the simpler examples is in TextAreaExtensions.cs.

EDIT:

In order to properly convert “data_attr” to “data-attr”, use the AnonymousObjectToHtmlAttributes static method.

IDictionary<string, object> htmlAttributes = HtmlHelper.AnonymousObjectToHtmlAttributes(attrs);