An extension method to create a SelectList, make your code neat & clean in MVC

When you have an IEnumerable model list bind to a select list items, you always need to write

var Items = Service.FindAll().Select(p => new SelectListItem() { Text = p.Name, Value = p.Id });

Here I create a extension method of IEnumerable<T> called “ToSelectList”,

    public static class SelectListExtensions
    {
        public static IEnumerable<SelectListItem> ToSelectList<T>(this IEnumerable<T> items,
            Func<T,string> text, Func<T,string> value = null, Func<T,Boolean> selected = null)
        {
            return items.Select(p => new SelectListItem
            {
                Text = text.Invoke(p),
                Value = (value==null? text.Invoke(p): value.Invoke(p)),
                Selected = selected == null? false: selected.Invoke(p)
            });
        }
    }

When you read the list from database and bind to a select list, you can write this way,

var Items = Service.FindAll().ToSelectList(p=>p.Name, p=>p.Id);
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