将 SQL 查询转换为 LINQ-to-SQL

Question

我需要帮助将SQL查询转换为LINQ到SQL

select top 5 customer_id, customer_name, product_id
from Customer 
Join Product on product_id = product_id
where (customer_active = 'TRUE')
order by checksum(newid())

如何在 LINQ to SQL 中做到这一点。谢谢

Answer 1

这已经解决了。感谢"CodeNotFound"的回答https://stackoverflow.com/a/43850748/1655774

db.Customer.Where(p => p.customer_active == true).Select(p => new CustomerViewModel
    {
         Customer_id= p.customer_id,
         Customer_name = p.customer_name,
         Product_id = p.Product.product_id
    }).OrderBy(c => SqlFunctions.Checksum(Guid.NewGuid())).Take(5).ToList();

Answer 2

试试这段代码

( from p in  Customer  
         join q in Product  on p.product_id  equals q.product_id
         join q in Product  on p.product_id  equals q.product_id
         where customer_active ==true  select new 
         {
            customer_id=p.customer_id,
            customer_name=p.customer_name,
            product_id=q.product_id
        }).OrderBy(c => SqlFunctions.Checksum(Guid.NewGuid())).Take(5).ToList();

Answer 3

你应该使用这种方式来删除布尔条件并减少代码

如果您需要在 Ef 中检查布尔条件

1.对于真实条件.db。Customer.Where(p => p.customer_active(.select(m=>m(.tolist((;1.对于虚假条件.db。Customer.Where(p => ！p.customer_active(.select(m=>m(.tolist((;

仅供参考