ASP.NET MVC3使用JsonResult返回Json数据示例

public JsonResult Index()
{
    JsonResult result = new JsonResult();
    result.Data = new
    {
        categories = db.Category,
        users = from item in db.User select new { item.Id, item.Usn }
    };
    result.JsonRequestBehavior = JsonRequestBehavior.AllowGet;

    return result;
}