public override void Add_Item(Instructor item)
{
using (ElectiveContext db = new ElectiveContext())
{
db.Instructors.Add(item);
db.SaveChanges();
}
}
public override void Delete_Item(int item)
{
using (ElectiveContext db = new ElectiveContext())
{
db.Students.Remove(db.Students.FirstOrDefault(e => e.Id == item));
db.SaveChanges();
}
}
public override void Add_Item(Subject item)
{
using (ElectiveContext db = new ElectiveContext())
{
db.Subjects.Add(item);
db.SaveChanges();
}
}
/// <summary>
/// 更新管理员登录时间
/// </summary>
/// <param name="admin">管理员对象</param>
public void UpdateLoginTime(SysAdmin admin)
{
if (admin != null)
{
admin.LastLoginTime = DateTime.Now;
db.Entry(admin).State = EntityState.Modified;
db.SaveChanges();
}
}
public override void Add_Item(Student item)
{
using (ElectiveContext db = new ElectiveContext())
{
var id = db.Students.Max(p => p.Id);
item.Id = ++id;
db.Students.Add(item);
db.SaveChanges();
}
}