Question

I am using a ListCollectionView as a datacontext to a tab control. I have added a GroupDescription to it based on an enum and I want a particular group to appear as the first tab in the tab control however now it is always being put on the bottom.

Profiles = new ListCollectionView(_profiles);
        Profiles.GroupDescriptions.Add(new PropertyGroupDescription("ProfileType"));
        Profiles.SortDescriptions.Add(new SortDescription("ProfileName", ListSortDirection.Ascending));

_profiles is an ObservableCollection of my profile ViewModels.

My Enum looks like:

public enum ProfileTypeEnum
    {
        CurrentSettings,
        CustomSettings,
        DefaultSettings
    }

So how can I force the CurrentSettings group to always be first?

Answer 1

Try to use an auxiliary property:

public class Item
{
    public ProfileTypeEnum ProfileType { get; set; }
    public string ProfileName { get; set; }
    public int ProfileTypeValue { get { return (int)ProfileType; } }
}

give values to the enumeration:

public enum ProfileTypeEnum
{
    CurrentSettings=0,
    CustomSettings=1,
    DefaultSettings=2
}

and add a sort description:

Profiles.SortDescriptions.Add(new SortDescription("ProfileTypeValue", ListSortDirection.Ascending));
Profiles.SortDescriptions.Add(new SortDescription("ProfileName", ListSortDirection.Ascending));

this way you can use enumeration’s values to alter the order and force one on top.