如何通过实体框架的id删除对象 [英] How to delete an object by id with entity framework

问题描述

在我看来，我必须在实体框架删除之前检索一个对象，如下所示

  var customer = context.Customers.First（c => c.Id = 1）; 
 
 context.DeleteObject（customer）; 
 
 context.Savechanges（）; 
  

所以我需要打两次数据库。有一个更简单的方法吗？

解决方案

与@Nix相同的一个小变化是强类型：

如果你不想查询它只是创建一个实体，然后删除它。

  Customer customer = new Customer（）{Id = id}; 
 context.Customers.Attach（customer）; 
 context.Customers.DeleteObject（customer）; 
 context.SaveChanges（）; 
  

It seems to me that I have to retrieve an object before I delete it with entity framework like below

var customer = context.Customers.First(c => c.Id = 1);

context.DeleteObject(customer);

context.Savechanges();

So I need to hit database twice. Is there a easier way?

解决方案

The same as @Nix with a small change to be strongly typed:

If you don't want to query for it just create an entity, and then delete it.

                Customer customer = new Customer () { Id = id };
                context.Customers.Attach(customer);
                context.Customers.DeleteObject(customer);
                context.SaveChanges();

这篇关于如何通过实体框架的id删除对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！