在WPF自定义扩展元素中扩展内部元素

Answer 1

您应该能够使用隐式

MaxDropDownHeight

设置

TimePicker

元素的

Style

属性:

<xctk:DateTimePicker x:Name="DTCalendar" Margin="10,10,10,0" VerticalAlignment="Top" ValueChanged="DTCalendar_ValueChanged" 
                     Width="234" Height="34" Format="Custom" FormatString="dd ddd yyyy, HH:mm" FontSize="14" FontWeight="Bold" 
                     HorizontalContentAlignment="Center">
    <xctk:DateTimePicker.Resources>
        <Style TargetType="xctk:TimePicker">
            <Setter Property="MaxDropDownHeight" Value="1000" />
        </Style>
    </xctk:DateTimePicker.Resources>
</xctk:DateTimePicker>