c# - Passing an object to HTML attributes

Question

How to pass an object to HTML attributes? For example I have the following code:

var attrs = new { id = "myid", style = "color: Red;" };

How to convert attrs to string like this to embed them into an HTML markup:

id="myid" style="color: Red;"

Thanks in advance :)

Answer 1

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);