实体框架6如何在不重新加载的情况下基于旧值更新字段？

Question

I'm finding a way to implement the behavior below in sql:

update TableName set Column1 = Column1 + 2

Does new entity framework 6 supports this kind?

Answer 1

Why not just use ExecuteSqlCommand

context.Database.ExecuteSqlCommand(@"UPDATE TableName SET [Column1] = [Column1] + 2");

And ofcourse you may consider to make some wrapping method to make this generic if you'll use is in many tables

Answer 2

Not by default, but there is a NuGet package available that provides this feature.

https://github.com/loresoft/EntityFramework.Extended

//update all tasks with status of 1 to status of 2
context.Tasks.Update(t => t.StatusId == 1, t2 => new Task {StatusId = 2});