Update multiple rows in Entity Framework from a list of ids

Question

I am trying to create a query for Entity Framework that will allow me to take a list of ids and update a field associated with them.

Example in SQL:

UPDATE Friends
SET msgSentBy = '1234'
WHERE id IN (1, 2, 3, 4)

How do I convert the above into Entity Framework?

Answer 1

Something like below:

var idList = new int[]{1, 2, 3, 4};
using (var db = new SomeDatabaseContext())
{
    var friends = db.Friends.Where(f => idList.Contains(f.ID)).ToList();
    friends.ForEach(a => a.msgSentBy='1234');
    db.SaveChanges();
}

You can update multiple fields as below:

friends.ForEach(a =>
                      {
                         a.property1 = value1;
                         a.property2 = value2;
                      });