ViewData Extension

viewdata extension

    public static class ViewDataExtension
    {
        public static void DisplayContext<T>(this ViewDataDictionary viewData, T instance, string key = null)
        {
            var keyValue = (string.IsNullOrEmpty(key)) ? typeof(T).FullName : typeof(T).FullName + "." + key;
            viewData[keyValue] = instance;
        }

        public static T DisplayContext<T>(this ViewDataDictionary viewData, string key = null)
        {
            var keyValue = (string.IsNullOrEmpty(key)) ? typeof(T).FullName : typeof(T).FullName + "." + key;
            var returnValue = viewData.Eval(keyValue) ?? default(T);
            return (T)returnValue;
        }
    }