更新实体框架中的问题

Question

I want update my table with two conditions :

Type == "پیش ثبت نام" && Approved == false

and I use this code :

using (NoavaranModel.NoavaranEntities1 db=new NoavaranModel.NoavaranEntities1())
{
    var query = db.Students.Where(p => p.Type == "پیش ثبت نام" && p.Approved == false).Single();
    query.IsRecivedSMS = true;

    db.SaveChanges();
}

but it's not working. Just updates one recode in db. How can I update all rows with above conditions in Entity Framework?

Answer 1

Just change the query to not select only one record which fits your contition, but all. Then update them all.

using (NoavaranModel.NoavaranEntities1 db=new NoavaranModel.NoavaranEntities1())
        {
            var query = db.Students.Where(p => p.Type == "پیش ثبت نام" && p.Approved == false);
            foreach(var record in query)
            {
              record.IsRecivedSMS = true;
            }

            db.SaveChanges();

        }