Rock.Web.UI.Controls.GroupTypeGroupPicker.LoadGroupTypes C# (CSharp) Method

        private void LoadGroupTypes()
        {
            _ddlGroupType.Items.Clear();
            _ddlGroupType.Items.Add( Rock.Constants.None.ListItem );

            var groupTypeService = new Rock.Model.GroupTypeService( new RockContext() );

            // get all group types that have the ShowInGroupList flag set
            var groupTypes = groupTypeService.Queryable().Where( a => a.ShowInGroupList ).OrderBy( a => a.Name ).ToList();

            foreach ( var g in groupTypes )
            {
                _ddlGroupType.Items.Add( new ListItem( g.Name, g.Id.ToString().ToUpper() ) );
            }
        }