ObjectStateManager没有定义问题 [英] ObjectStateManager no definition issue

问题描述

我正面临着 ObjectStateManager 的问题。

我是使用 System.Data.Entity 和 System.Data.Objects 但是，它没有显示 ObjectStateManager 。

I am using both System.Data.Entity and System.Data.Objects however it shows no definition for ObjectStateManager.

SampleContext db = new SampleContext();
Employees employeeFromDB = db.Employees.Single(x => x.Id == employee.Id);

employeeFromDB.FullName = employee.FullName;
employeeFromDB.Gender = employee.Gender;
employeeFromDB.Age = employee.Age;
employeeFromDB.HireDate = employee.HireDate;
employeeFromDB.Salary = employee.Salary;
employeeFromDB.PersonalWebSite = employee.PersonalWebSite;

db.ObjectStateManager.ChangeObjectState(employeeFromDB, System.Data.EntityState.Modified);
db.SaveChanges();
return RedirectToAction("Details", new {Id = employee.Id});

推荐答案

来自：为什么ObjectStateManager属性在我的数据库上下文中不存在？

var manager = ((IObjectContextAdapter)db).ObjectContext.ObjectStateManager;

这篇关于ObjectStateManager没有定义问题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！