LeafWeb/WebCms/Utility/CssClassUtil.cs

using System.Linq;
using System.Web.Mvc;

namespace LeafWeb.WebCms.Utility
{
    public static class CssClassUtil
    {
        private const string KeyName = "cssClass";
        public static ViewDataDictionary CreateCssClassDataDictionary(params string[] cssClasses) 
            => new ViewDataDictionary { { KeyName, cssClasses.ToArray() } };

        public static void AddCssClass(this ViewDataDictionary vdd, string cssClass)
        {
            if (!vdd.ContainsKey(KeyName))
                vdd["cssClass"] = new []{ cssClass };
            else
            {
                var cssClassList = ((string[])vdd[KeyName]).ToList();
                if (!cssClassList.Contains(cssClass))
                    cssClassList.Add(cssClass);
                vdd[KeyName] = cssClassList.ToArray();
            }
        }

        public static void SetButtonDisabled(this ViewDataDictionary vdd)
        {
            vdd.AddCssClass("disabled");
        }

        public static bool IsButtonDisabled(this ViewDataDictionary vdd)
        {
            return vdd.ContainsKey(KeyName) && ((string[]) vdd[KeyName]).Contains("disabled");
        }
    }
}