Question

I try to update twice with same data but it throw exception

    public void UpdateOnSubmit<T>(T data) where T : class
    {
        lock (_lockObj)
        {
            using (DataModel dx = new DataModel(this._adapter.ConnectionString))
            {
                dx.GetTable<T>().Attach(data);
                dx.Refresh(RefreshMode.KeepCurrentValues, data);
                dx.SubmitChanges();
            }
        }
    }

the exception is

An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported.

First update is success but not in second. Thanks in advance

Regards,

Brian

Answer 1

Okay seem like i’ve found the solution again. I Just set DeferredLoadingEnabled to false and it work like a charm.

    public void UpdateOnSubmit<T>(T data) where T : class
    {
        lock (_lockObj)
        {
            using (DataModel dx = new DataModel(this._adapter.ConnectionString))
            {
                dx.DeferredLoadingEnabled = false;
                dx.GetTable<T>().Attach(data);
                dx.Refresh(RefreshMode.KeepCurrentValues, data);
                dx.SubmitChanges();
            }
        }
    }