Question

In MVC app, I am having this big object that is used in classic view/edit/create pattern.

When user edits the object I save it as:

  public bool SetMyObject(MyObject newObject) {
     MyObject current = GetObjectById(newObject.Id);
     current.Prop1 = newObject.Prop1
     ...
     current.PropN = newObject.PropN
     db.SaveChanges();
  }

MyObject is pretty big so I am wondering is there any better way to do this, not involving per-property assignments. For instance something along the lines db.MyObject.UpdateObject(current, tnew).

Ty.

Answer 1

You can use the ApplyPropertyChanges method.

Applies property changes from a detached object to an object already attached to the object context.

public bool SetMyObject(MyObject newObject)
{
    db.ApplyPropertyChanges("MyObjectSet", newObject);
    db.SaveChanges();
}

(where “MyObjectSet” is the name of the entity set to which the object belongs)