var expr = from p in context.Products            select new             {                 商品ID = p.ProductID,                 商品名称 = p.ProductName,                 是否库存 = p.UnitsInStock > 0 ? "是" : "否"             };

SELECT     [Extent1].[ProductID] AS [ProductID],     [Extent1].[ProductName] AS [ProductName],     CASE WHEN ([Extent1].[UnitsInStock] > 0) THEN N‘是‘ ELSE N‘否‘ END AS [C1]    FROM [dbo].[Product] AS [Extent1]