How to Get value from ienumerable list?

Question

Hi I tried var maxId = HouseList . Max ( h => h . HouseId ); but i get error as Sequence contains no elements But I had loaded element into list as public void LoadHouse () { _stx = new CPMDomainContext (); LoadOperation House > lo = _stx . Load ( _stx . GetHousesQuery ()); HouseList = lo . Entities ; } I use HouseList as ItemSource for a combobox..It binds data..But while i check HouseList.count always zero.How can i get elements from HouseList.Help me..

anand P · Answer

Hi vulpes My combobox is in view.I bind it from view model by having a list called HouseList. I can get value from combobox itself.But i don't know how to pass this value to my view model. so i try to take value from HouseList in viewmodel itself.

Vulpes · Answer

So just to be clear are you saying that even though HouseList appears to have no elements you can nevertheless bind to it and the combobox does display some elements? If so then perhaps your best option is to get the elements from the combobox itself.

anand P · Answer

Hi  i tried it..Now also HouseList.count is zero. and the following throw exception. var maxId = HouseList.Max(h => h.HouseId);

Sukesh Marla · Answer

Do like this List HouseList =lo.Entities.ToList(); Now Bind HouseList to DropDown and now it will work var maxId = HouseList.Max(h => h.HouseId); Check this is correct answer if it helped

anand P · Answer

I tried it..Message box also show 0.

Vulpes · Answer

What do you get if you try to count the elements immediately after loading? public void LoadHouse() { _stx = new CPMDomainContext(); LoadOperation lo = _stx.Load(_stx.GetHousesQuery()); HouseList = lo.Entities; MessageBox.Show(HouseList.Count().ToString()); }