Question

MVC，JSON＆amp; amp; LINQ - 我创建了一个返回JSONResult的ActionResult：

var formhistory = from p in _formsRepository.ReturnedForms
                          where p.DateAdded >= DateTime.Now.Date.AddDays(-15) && p.DateAdded <= DateTime.Now.Date
                          group p by new {p.Centre, p.Form, p.DateAdded}
                          into g
                          select new {
                                         g.Key.Centre,
                                         g.Key.Form,
                                         g.Key.DateAdded,
                                         Total = g.Sum(p => p.Quantity)
                                     };
return Json(formhistory, JsonRequestBehavior.AllowGet);

这给了我一个很好的JSON结果集如下：

[
  {"Centre":"Centre1","Form":"Advice","DateAdded":"\/Date(1331856000000)\/","Total":1067},
  {"Centre":"Centre1","Form":"Advice","DateAdded":"\/Date(1332460800000)\/","Total":808},
  {"Centre":"Centre1","Form":"Advice","DateAdded":"\/Date(1333062000000)\/","Total":559},
  {"Centre":"Centre1","Form":"Advice","DateAdded":"\/Date(1333666800000)\/","Total":1448}
]

我的问题是：我正在尝试操作这个JSON字符串，以便代替“Form”和“Total”的2个键/值对，我只有1，即“Form”：“Total”。

我意识到这可能是一个非常基本的问题，但有人能指出我正确的方向吗？（除了门！）

Answer 1

select new {
   g.Key.Centre,
   //g.Key.Form,
   g.Key.DateAdded,
   Form = g.Sum(p => p.Quantity)
}

会给你一个键“Form”，其值为前者“Total”。这就是你想要的吗？

Answer 2

修改linq查询中的选择部分

   select new {  
      g.Key.Centre, 
      g.Key.DateAdded,  
      NewField =  String.Format("{0} - {1}",g.Key.Form,g.Sum(p => p.Quantity).ToString())                                     
     };

我认为这会解决你的目的。

从LINQ select语句返回自定义json

2 个答案: