Question

我在创建linq时遇到一些困难，我需要复制下面的SQL语句。

    SELECT TOP (1000) [Id]
      ,[Price]
      ,[ThicknessFrom]
      ,[ThicknessTo]
      ,[WeightFrom]
      ,[WeightTo]
  FROM [dbo].[MyTable] 
  WHERE (8 between [ThicknessFrom] and [ThicknessTo])
  AND (100 between [WeightFrom] and [WeightTo])

我拥有的数据示例：

id: 1, price: 1, thicknessFrom: 0, thicknessTo: 10, weightFrom: 0, weightTo: 125
id: 2, price: 2, thicknessFrom: 11, thicknessTo: 20, weightFrom: 126, weightTo: 250

我想从上面的linq语句返回查询，该语句将返回基于2个输入，重量和厚度的数据，这将返回id = 1。

感谢

Answer 1

MyTable.Where(entities => entities.ThicknessFrom <= 8)
       .Where(entities => entities.ThicknessTo >= 8)
       .Where(entities => entities.WeightFrom <= 100)
       .Where(entities => entities.WeightTo >= 100)
       .Take(1000);

我们上面所做的是链接多个谓词以保持清洁/易于阅读，在执行.Take()方法之前，查询实际上并未执行。

Answer 2

让inputThicknes和inputWeight成为两个输入，然后您可以像下面这样创建LINQ，它将为您提供所需的结果：

var requiredCollection = (from t in db.MyTable where 
                               t.ThicknessFrom < inputThicknes  && 
                               t.ThicknessTo >= inputThicknes  &&
                               t.WeightFrom < inputWeight &&
                               t.WeightTo >= inputWeight
                          select t).Take(1000)

Linq值介于2列范围之间

2 个答案: