Hello Dean,
RadDateTimePicker does not have an attached property for changing the icon. The control template must be modified in order to implement a different icon. If you generate the template, you will find the following
ContentControl, which is responsible for the icon:
<ContentControl x:Name="DropDownIcon" Background="White" Foreground="Black" IsTabStop="False">
<ContentControl.Template>
<ControlTemplate TargetType="{x:Type ContentControl}">
<Grid>
<Path x:Name="CalendarIconBackground" Data="M0,0.5L7,0.5 M0,2.5L7,2.5 M0,4.5L7,4.5 M0,6.5L7,6.5 M0.5,0L0.5,7 M2.5,0L2.5,7 M4.5,0L4.5,7 M6.5,0L6.5,7" Height="7" Margin="4,5,4,4" Stroke="{TemplateBinding Background}" Width="7"/>
<Path x:Name="CalendarIconForeground" Data="M0,0.5L7,0.5 M0,2.5L7,2.5 M0,4.5L7,4.5 M0,6.5L7,6.5 M0.5,0L0.5,7 M2.5,0L2.5,7 M4.5,0L4.5,7 M6.5,0L6.5,7" Height="7" Margin="4,4,4,5" Stroke="{TemplateBinding Foreground}" Width="7"/>
</Grid>
</ControlTemplate>
</ContentControl.Template>
</ContentControl>
I hope this will be helpful.
Best wishes,
Dani
the Telerik team
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