How to set disabled in MVC htmlAttribute

Question

When using an HTML Helper, what is the best method to set an attribute based on a condition. For example

<%if (Page.User.IsInRole(\"administrator\")) {%&g         


        

Answer 1

Created an extension method on Object that will create a copy of the input object excluding any properties that are null, and return it all as dictionary that makes it easily used in MVC HtmlHelpers:

public static Dictionary StripAnonymousNulls(this object attributes)
{
   var ret = new Dictionary();
   foreach (var prop in attributes.GetType().GetProperties())
   {
      var val = prop.GetValue(attributes, null);
      if (val != null)
         ret.Add(prop.Name, val);
   }
   return ret;
}

Not sure about performance implications of reflecting through properties twice, and don't like the name of the extension method much, but it seems to do the job well ...

new {
       @class = "contactDetails",
       disabled = Page.User.IsInRole("administrator") ? "true" : null
    }.StripAnonymousNulls()