CODEWITHSUNDEEP
.netwpfxamldatepicker
Lamloumi Afif
Lamloumi Afif

Reputation: 9081

Change Date appearence before DisplayDateStart date in datepicker

I have a WPF application, in which I have a datepicker :

<DatePicker HorizontalAlignment="Left" VerticalAlignment="Top" SelectedDate="{Binding DateP, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"  DisplayDateStart="{Binding Source={x:Static sys:DateTime.Now}, Mode=OneTime}"/>

I'd like to change the appearence of dates before the DisplayDateStart date. Now these dates are hidden

  1. How can I do this?
  2. What is the best way to accomplish this task?

Upvotes: 2

Views: 105

Answers (2)

Bill Tarbell
Bill Tarbell

Reputation: 5234

WPF doesn't seem to offer a VisualState for these hidden items. However, you can use a trigger on the CalendarDayButton style's ControlTemplate. In the below example I'm collapsing the hidden date items to avoid the unnecessary whitespace.

<Style TargetType="CalendarDayButton" x:Key="CalendarDayButtonStyle">
  <Setter Property="MinWidth" Value="5" />
  <Setter Property="MinHeight" Value="0" />
  <Setter Property="FontSize" Value="10" />
  <Setter Property="HorizontalContentAlignment" Value="Center" />
  <Setter Property="VerticalContentAlignment" Value="Center" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="CalendarDayButton">
        <Grid x:Name="dayButtonContainer">
          // ... your presentation display
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="Visibility" Value="Hidden">
            <Setter TargetName="dayButtonContainer" Property="Visibility" Value="Collapsed"/>
          </Trigger>
          <Trigger Property="Visibility" Value="Visible">
            <Setter TargetName="dayButtonContainer" Property="Visibility" Value="Visible"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

enter image description here

Upvotes: 0

Mike Nowak
Mike Nowak

Reputation: 333

Instead of hiding the dates using the DisplayDateStart you can specify the BlackoutDates so that the dates will be displayed but not selectable. This way you can style your DatePicker and apply one you prefer for non selectable dates (it is crossed out in default style).

More on the topic: MSDN: DatePicker.BlackoutDates Property

Upvotes: 1

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