LINQ系列：LINQ to SQL Transact-SQL函数

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]