EF entity.attach does not work
.net, c#, entity-framework, sql-server-ce
Solution
When you attach objects to the context, their default state is Unchanged, you should force the update by setting `DBContext.Entry(entity).State = EntityState.Modified;` And only after that call `DBContext.SaveChanges();`
Problem
I have an entity retrieved from db as follows ``` using ( var ctx = new Mycontext() ) return ctx.MyGroups.First( // query ); ``` this is bound to UI and updated on user save action as follows ``` using ( var ctx = new Mycontext() ) { ctx.MyGroups.Attach(o); // verified object o is updated ctx.SaveChanges(); } ``` However the db is NOT updated Environment is .net 4.0, db is sql compact 4 Any help on what could be missing/wrong ?