Rock.Model.DataViewService.GetIds C# (CSharp) Méthode

        public List<int> GetIds( int dataViewId )
        {
            var dataView = Queryable().AsNoTracking().FirstOrDefault( d => d.Id == dataViewId );
            if ( dataView != null && dataView.EntityTypeId.HasValue )
            {
                var cachedEntityType = EntityTypeCache.Read( dataView.EntityTypeId.Value );
                if ( cachedEntityType != null && cachedEntityType.AssemblyName != null )
                {
                    Type entityType = cachedEntityType.GetEntityType();

                    if ( entityType != null )
                    {
                        System.Data.Entity.DbContext reportDbContext = Reflection.GetDbContextForEntityType( entityType );
                        if ( reportDbContext != null )
                        {
                            reportDbContext.Database.CommandTimeout = 180;
                            IService serviceInstance = Reflection.GetServiceForEntityType( entityType, reportDbContext );
                            if ( serviceInstance != null )
                            {
                                var errorMessages = new List<string>();
                                ParameterExpression paramExpression = serviceInstance.ParameterExpression;
                                Expression whereExpression = dataView.GetExpression( serviceInstance, paramExpression, out errorMessages );

                                MethodInfo getMethod = serviceInstance.GetType().GetMethod( "Get", new Type[] { typeof( ParameterExpression ), typeof( Expression ) } );
                                if ( getMethod != null )
                                {
                                    var getResult = getMethod.Invoke( serviceInstance, new object[] { paramExpression, whereExpression } );
                                    var qry = getResult as IQueryable<IEntity>;

                                    return qry.Select( t => t.Id ).ToList();
                                }
                            }
                        }
                    }
                }
            }

            return null;
        }