<telerik:RadGridView >
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="{Binding Dag1}"
                                            UniqueName="test1"
                                            Style="{StaticResource KalenderDagColumnStyle}">
 
...
 public MainWindow()
        {
            InitializeComponent();
            this.DataContext = this;
            Dag1 = DateTime.Today;
            Dag2 = DateTime.Today.AddDays(9);
         }
 
        public DateTime Dag1 { get; set; }
 
        public DateTime Dag2 { get; set; }


The KalenderDagColumnStyle is a StyleSelector
  <local:DatumKolomStyleSelector x:Key="DatumKolomStyleSelector"
                                       WeekdagStyle="{StaticResource WeekdagCellStyle}"
                                       WeekendStyle="{StaticResource WeekendCellStyle}"
                                       VandaagStyle="{StaticResource VandaagCellStyle}" />
        <Style x:Key="KalenderDagColumnStyle"
               TargetType="telerik:GridViewDataColumn">
            <Setter Property="HeaderCellStyle"
                    Value="{StaticResource KalenderDagHeaderStyle}" />
            <Setter Property="CellStyleSelector"
                    Value="{StaticResource DatumKolomStyleSelector}" />
        </Style>


























  public class DatumKolomStyleSelector : StyleSelector

    {
        public Style VandaagStyle { get; set; }
        public Style WeekendStyle { get; set; }
        public Style WeekdagStyle { get; set; }
 
        public override Style SelectStyle(object item, DependencyObject container)
        {
            GridViewCell c = container as GridViewCell;
            DateTime d = (DateTime)c.Column.Header;
 
            if (d == DateTime.Today)
                return VandaagStyle;
            else if (d.DayOfWeek == DayOfWeek.Saturday || d.DayOfWeek == DayOfWeek.Sunday)
                return WeekendStyle;
            else
                return WeekdagStyle;
 
        }
    }




When a column represents Today, it has a style, when its a weekend day, it has a style, and otherwise it has another style

In Q2 c.Column.Header had a value in the SelectStyle method,

in Q3 c.Column.Header is null in the SelectStyle method .





When i hardcode the headers then the value is not null in the SelectStyle method,

but bound values are apparently not available in the style selector





Is this expected behaviour ? is there a way around for me ? ( using Tag instead of Header does not make a difference).

The column headers must be data-bound, because the user can scroll back and forwards in time.



I would have attached a sample solution to this thread; but apparently zips are not allowed