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How to Customize the Calendar Buttons

Customizing the buttons in RadCalendar could easily be achieved by creating a custom StyleSelector and setting it to the DayButtonStyleSelector property of the control.

This tutorial will go through on how to:

  • Create a custom DayButtonStyleSelector

  • Customize the CalendarButton Style

  • Set the DayButtonStyleSelector of RadCalendar

The next example shows how to create a custom DayButtonStyleSelector in order to change the Background color of every Monday in the calendar.

  1. First you will need to create a DayButtonStyleSelector that inherits StyleSelector class:

        public class DayButtonStyleSelector : StyleSelector
        {
        }
    
  2. Create a property of type Style:

        public class DayButtonStyleSelector : StyleSelector
        {
            public Style SpecialStyleMonday { get; set; }
        }
    
  3. Override the SelectStyle() method:

        public class DayButtonStyleSelector : StyleSelector
        {
            public Style SpecialStyleMonday { get; set; }
    
            public override Style SelectStyle(object item, DependencyObject container)
            {
                CalendarButtonContent content = item as CalendarButtonContent;
                if (content != null)
                {
                    if (content.Date.DayOfWeek == DayOfWeek.Monday && content.ButtonType == CalendarButtonType.Date)
                    {
                        return SpecialStyleMonday;
                    }
                }
                return base.SelectStyle(item, container);
            }
        }
    
  4. Add the following namespaces in the xaml:

        <UserControl xmlns:local="clr-namespace:WpfApplication1"
                     xmlns:calendar="clr-namespace:Telerik.Windows.Controls.Calendar;assembly=Telerik.Windows.Controls.Input">
        </UserControl>
    
  5. Create a StaticResource for the DayButtonStyleSelector and the SpecialStyleMonday Style:

        <local:DayButtonStyleSelector x:Key="CustomStyleSelector">
            <local:DayButtonStyleSelector.SpecialStyleMonday>
                <Style TargetType="calendar:CalendarButton">
                    <Setter Property="Background">
                        <Setter.Value>
                            <SolidColorBrush Color="Orange" Opacity="0.6"/>
                        </Setter.Value>
                    </Setter>
                </Style>
            </local:DayButtonStyleSelector.SpecialStyleMonday>
        </local:DayButtonStyleSelector>
    
  6. Set the DayButtonStyleSelector property of the control:

        <telerik:RadCalendar DayButtonStyleSelector="{StaticResource CustomStyleSelector}"/>
    
  7. The last step is to set the DayButtonStyle to null in order for the custom DayButtonStyleSelector to be used:

        <telerik:RadCalendar DayButtonStyleSelector="{StaticResource CustomStyleSelector}"
                     DayButtonStyle="{x:Null}"/>
    

    The next screenshot shows the final result:

radcalendar-styling-and-appearance-daybuttonstyleselector-1