update row in entity frmae work

Updating entiry it depeds how you are using it

1. senario - You are fetching and updating using same context object

In that you can do like this

using (var ctx = new MyDBContext())

  var obj = ctx.ObjectLists.FirstOrDefault(o=>o.id==1);
  obj.Prop1Value = property value to set;
  ctx.SaveChanges();
}


2. Scenario - You are fetching using one context object and updating using another context object


public MyObject GetObject(int id)
{
  using (var ctx = new MyDBContext())
  {
 
  MyObject obj = ctx.ObjectLists.FirstOrDefault(o=>o.id==1);
  }
  return obj;
}
 

public void UpdateObject(Type PropertyValue, MyObject obj)
{
  //this line can be out of this method this is just for example

  obj.Prop1Value = PropertyValue;

  using (var ctx= new MyDBContext())
  {
  //first attche object
  ctx.ObjectList.Attach(obj);
  //Second cahnge stat of attached objbect
  ctx.ObjectStateManager.ChangeObjectState(obj, System.Data.EntityState.Modified);
  //Third save object
  ctx.SaveChanges();
  }
}