引用匿名类型属性

Question

我正在创建一个复合匿名类型，并想知道我是否可以为NoPercent引用YesPercent字段？

 var test = (from p in db.users
             group p by p.ID into g
             select new
             {
                 ID = g.Key,
                 Frequency = g.Count(),
                 Question = g.FirstOrDefault().Question,
                 YesPercent = 50*564/32.5,
                 NoPercent = YesPercent - 10
              })

Answer 1

稍微改变一下

 var test = (from p in db.users 
             group p by p.ID into g 
             let yesPercent = 50*564/32.5 // this variable will be available in your select 
             select new 
             { 
                 ID = g.Key, 
                 Frequency = g.Count(), 
                 Question = g.FirstOrDefault().Question, 
                 YesPercent = yesPercent, 
                 NoPercent = yesPercent - 10 
              }) 

我认为你实际上发生了一些更复杂的事情。毕竟，YesPercent的计算与查询数据无关，因此您可以很好地在查询之外声明一个变量并在其中使用它。