Question

我可能是愚蠢但似乎从来没有在＆＃39; lambda窗口中显示任何内容。运行代码后。任何人都可以解释它应该如何工作吗？

Answer 1

如果使用查询语法编写查询，则lambda窗口会将查询转换为方法语法。

尝试运行示例“LINQ to SQL怎么样？”在样本选项卡中的LINQPad 5分钟感应*文件夹中。（感应= LINQPad错字，不是我的！）

您的代码窗口如下所示：

    from p in Products
let spanishOrders = p.OrderDetails.Where (o => o.Order.ShipCountry == "Spain")
where spanishOrders.Any()
orderby p.ProductName
select new
{
    p.ProductName,
    p.Category.CategoryName,
    Orders = spanishOrders.Count(), 
    TotalValue = spanishOrders.Sum (o => o.UnitPrice * o.Quantity)
}

并且lambda窗口将如下所示：

Products
   .Select (
      p => 
         new  
         {
            p = p, 
            spanishOrders = p.OrderDetails.Where (o => (o.Order.ShipCountry == "Spain"))
         }
   )
   .Where (temp0 => temp0.spanishOrders.Any ())
   .OrderBy (temp0 => temp0.p.ProductName)
   .Select (
      temp0 => 
         new  
         {
            ProductName = temp0.p.ProductName, 
            CategoryName = temp0.p.Category.CategoryName, 
            Orders = temp0.spanishOrders.Count (), 
            TotalValue = temp0.spanishOrders.Sum (o => (o.UnitPrice * (Decimal?)(o.Quantity)))
         }
   )

什么是LinqPad的lambda窗口？

1 个答案: