silverlight中TimePicker和TimeUpdown无法在ChildWindow中使用的问题

silverlight存在一个bug，那就是popup无法嵌套的问题，childwindow是一个popup，timepicker和timeupdown定义中也存在一个popup，即下图的效果：

我在网上（http://forums.silverlight.net/forums/p/108539/297083.aspx）找到的解决办法就是重写timeupdown的style，将popup关掉即可实现在childwindow中添加timeupdown了，我只找到了timeupdown的style定义，以下是我重写后的style：

<Style x:Key="TimePicker_IsPopupFalse"
TargetType="inputToolkit:TimeUpDown">

        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="MinHeight" Value="20" />
        <Setter Property="IsTabStop" Value="False" />
        <Setter Property="MinWidth" Value="20" />
        <Setter Property="BorderBrush">
            <Setter.Value>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FFA3AEB9" Offset="0" />
                    <GradientStop Color="#FF8399A9" Offset="0.375" />
                    <GradientStop Color="#FF718597" Offset="0.375" />
                    <GradientStop Color="#FF617584" Offset="1" />
                </LinearGradientBrush>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="inputToolkit:TimeUpDown">
                    <Grid>
                        <!-- visual states -->
                        <vsm:VisualStateManager.VisualStateGroups>
                            <!-- common states-->
                            <vsm:VisualStateGroup x:Name="CommonStates">
                                <!-- all contained elements are controls that will take care of visualizing the disabled state themselves -->
                                <vsm:VisualStateGroup.Transitions>
                                    <vsm:VisualTransition GeneratedDuration="0" />
                                </vsm:VisualStateGroup.Transitions>
                                <vsm:VisualState x:Name="Normal" />
                                <vsm:VisualState x:Name="MouseOver" />
                                <vsm:VisualState x:Name="Pressed" />
                                <vsm:VisualState x:Name="Disabled" />
                            </vsm:VisualStateGroup>
                            <!-- focus states -->
                            <vsm:VisualStateGroup x:Name="FocusStates">
                                <!-- all contained elements are controls that will take care of visualizing the focus state themselves -->
                                <vsm:VisualState x:Name="Focused" />
                                <vsm:VisualState x:Name="Unfocused" />
                            </vsm:VisualStateGroup>
                            <!-- TimeHintStates -->
                            <vsm:VisualStateGroup x:Name="TimeHintStates">
                                <vsm:VisualState x:Name="TimeHintOpenedUp">
                                    <Storyboard>
                                        <!--lensso修改【注释部分为样式定义】-->
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintPopup" Storyboard.TargetProperty="IsOpen">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="True"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <!--<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible" />
</ObjectAnimationUsingKeyFrames>-->
                                        <!--/lensso修改-->
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)">

                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="-23" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Height">
                                            <DiscreteDoubleKeyFrame KeyTime="00:00:00" Value="0" />
                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="22" />
                                        </DoubleAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                                <vsm:VisualState x:Name="TimeHintOpenedDown">
                                    <Storyboard>
                                        <!--lensso修改【注释部分为原样式定义】-->
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintPopup" Storyboard.TargetProperty="IsOpen">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="True"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <!--<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible" />
</ObjectAnimationUsingKeyFrames>-->
                                        <!--/lensso修改-->
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)">
                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Height">
                                            <DiscreteDoubleKeyFrame KeyTime="00:00:00" Value="0" />
                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="22" />
                                        </DoubleAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                                <vsm:VisualState x:Name="TimeHintClosed">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:20" Value="Collapsed" />
                                        </ObjectAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)">
                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TimeHintVisualElement" Storyboard.TargetProperty="Height">
                                            <DiscreteDoubleKeyFrame KeyTime="00:00:00" Value="22" />
                                            <SplineDoubleKeyFrame KeyTime="00:00:00.200" KeySpline="0,0,0,1" Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                            </vsm:VisualStateGroup>
                            <!-- ParsingStates -->
                            <vsm:VisualStateGroup x:Name="ParsingStates">
                                <vsm:VisualState x:Name="ValidTime">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="validicon" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                                <vsm:VisualState x:Name="InvalidTime">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="invalidicon" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                                <vsm:VisualState x:Name="EmptyTime">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="emptyicon" Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </vsm:VisualState>
                            </vsm:VisualStateGroup>
                        </vsm:VisualStateManager.VisualStateGroups>
                        <!-- Spinner + HintVisualElement + TextBox -->
                        <!-- the border will be 'flown out' to act as a balloon -->
                        <!--lensso修改【原样式定义为IsOpen="True"】-->
                        <Popup x:Name="TimeHintPopup" IsOpen="False" VerticalOffset="0">
                            <!--/lensso修改-->
                            <Border x:Name="TimeHintVisualElement" IsHitTestVisible="True" BorderBrush="Gray" Background="White" Visibility="Collapsed"  HorizontalAlignment="Left" BorderThickness="1">
                                <Border.RenderTransform>
                                    <TransformGroup>
                                        <ScaleTransform />
                                        <SkewTransform />
                                        <RotateTransform />
                                        <TranslateTransform />
                                    </TransformGroup>
                                </Border.RenderTransform>
                                <Grid>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition />
                                        <ColumnDefinition Width="Auto" MinWidth="15" />
                                    </Grid.ColumnDefinitions>
                                    <ContentControl Grid.Column="0" IsTabStop="False" IsHitTestVisible="False" Margin="3" HorizontalAlignment="Right" VerticalAlignment="Center" Foreground="#FF4A4A4A" FontSize="10" Content="{TemplateBinding TimeHintContent}" />
                                    <ContentControl x:Name="emptyicon" IsTabStop="False" IsHitTestVisible="False" Margin="3" Visibility="Collapsed" Grid.Column="1" />
                                    <ContentControl x:Name="validicon" IsHitTestVisible="False" IsTabStop="False" Margin="3" Visibility="Collapsed" Grid.Column="1" />
                                    <ContentControl x:Name="invalidicon" IsTabStop="False" IsHitTestVisible="False" Visibility="Collapsed" VerticalAlignment="Center" Grid.Column="1">
                                        <Grid VerticalAlignment="Bottom" Width="10" Height="13">
                                            <Path Stretch="Fill" Data="F1 M 28.1143,29.4857L 28.1143,27.4286L 20.7612,13.0286L 19.3898,13.0286L 12.3429,27.4286L 12.3429,29.4857L 28.1143,29.4857 Z " StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Bevel" Height="11.833" HorizontalAlignment="Stretch" VerticalAlignment="Top">
                                                <Path.Stroke>
                                                    <LinearGradientBrush StartPoint="1.10074,0.462591" EndPoint="-0.102151,0.462591">
                                                        <GradientStop Color="#F6CAA709" Offset="0.0436364" />
                                                        <GradientStop Color="#F3F7F34F" Offset="0.149091" />
                                                        <GradientStop Color="#E7CAA709" Offset="0.825455" />
                                                        <GradientStop Color="#E7967C07" Offset="0.967124" />
                                                        <GradientStop Color="#E7625106" Offset="0.967273" />
                                                    </LinearGradientBrush>
                                                </Path.Stroke>
                                                <Path.Fill>
                                                    <LinearGradientBrush StartPoint="1.13883,0.460318" EndPoint="-0.140331,0.460318">
                                                        <GradientStop Color="#FFF7F79F" Offset="0.123636" />
                                                        <GradientStop  Color="#FBFBFB7D" Offset="0.177662" />
                                                        <GradientStop Color="#F6FFFF5B" Offset="0.24" />
                                                        <GradientStop Color="#E7CAA709" Offset="0.52" />
                                                        <GradientStop Color="#9ADABE0C" Offset="0.941376" />
                                                        <GradientStop Color="#4DEBD60F" Offset="0.941818" />
                                                        <GradientStop Color="#FBF6EC20" Offset="0.956364" />
                                                        <GradientStop Color="#FFFFFF2F" Offset="0.963636" />
                                                    </LinearGradientBrush>
                                                </Path.Fill>
                                            </Path>
                                            <Path Stretch="Fill" StrokeThickness="0.3" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Bevel" Stroke="#FF1B1B54" Data="F1 M 18.6937,17.3004L 22.2563,17.3004L 21.1313,23.6937L 19.8563,23.6937L 18.6937,17.3004 Z " Margin="4.25,2.25,3.75,0" Height="4.683" VerticalAlignment="Top">
                                                <Path.Fill>
                                                    <LinearGradientBrush StartPoint="-0.400002,0.50126" EndPoint="1.4,0.50126">
                                                        <GradientStop Color="#FFF7F79F" Offset="0.123636" />
                                                        <GradientStop Color="#FB8F8873" Offset="0.175974" />
                                                        <GradientStop Color="#F6271A47" Offset="0.236364" />
                                                        <GradientStop Color="#E7271A47" Offset="0.534545" />
                                                        <GradientStop Color="#9A89782B" Offset="0.941391" />
                                                        <GradientStop Color="#4DEBD60F" Offset="0.941818" />
                                                        <GradientStop Color="#FBF6EC20" Offset="0.956364" />
                                                        <GradientStop Color="#FFFFFF2F" Offset="0.963636" />
                                                    </LinearGradientBrush>
                                                </Path.Fill>
                                            </Path>
                                            <Path Height="3.11" Stretch="Fill" StrokeThickness="0.3" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round" Stroke="#FF1C1C50" Data="F1 M 20.225,25.122L 20.725,25.122C 21.2773,25.122 21.725,25.5697 21.725,26.122L 21.725,26.872C 21.725,27.4243 21.2773,27.872 20.725,27.872L 20.225,27.872C 19.6727,27.872 19.225,27.4243 19.225,26.872L 19.225,26.122C 19.225,25.5697 19.6727,25.122 20.225,25.122 Z " Margin="3.833,0,4.167,0.833" VerticalAlignment="Bottom">
                                                <Path.Fill>
                                                    <LinearGradientBrush StartPoint="-0.0599991,0.5" EndPoint="1.06,0.5">
                                                        <GradientStop Color="#F6271A47" Offset="0.236364" />
                                                        <GradientStop Color="#E7271A47" Offset="0.534545" />
                                                        <GradientStop Color="#9A89782B" Offset="0.98135" />
                                                        <GradientStop Color="#4DEBD60F" Offset="0.981818" />
                                                    </LinearGradientBrush>
                                                </Path.Fill>
                                            </Path>
                                        </Grid>
                                    </ContentControl>
                                </Grid>
                            </Border>
                        </Popup>
                        <inputToolkit:ButtonSpinner x:Name="Spinner" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Style="{TemplateBinding SpinnerStyle}" MinWidth="35" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" IsTabStop="False">
                            <TextBox x:Name="Text" BorderThickness="0" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}" Foreground="{TemplateBinding Foreground}" MinWidth="20" AcceptsReturn="False" Text="{TemplateBinding Value}" TextAlignment="Right" TextWrapping="NoWrap">
                                <TextBox.Style>
                                    <Style TargetType="TextBox">
                                        <Setter Property="Template">
                                            <Setter.Value>
                                                <ControlTemplate TargetType="TextBox">
                                                    <ScrollViewer x:Name="ContentElement" Padding="0" BorderThickness="0" />
                                                </ControlTemplate>
                                            </Setter.Value>
                                        </Setter>
                                    </Style>
                                </TextBox.Style>
                            </TextBox>
                        </inputToolkit:ButtonSpinner>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

<!--lensso修改--><!--/lensso修改-->之间的部分是我做过修改的部分。

完成以上style重写以后在添加timeupdown时将它的style设成重写的style，如下：

 <inputToolkit:TimeUpDown Height="25" Width="20" Style="{StaticResource TimePicker_IsPopupFalse}"/>

完成以上所有工作后在childwindow中打开的页面就可以正常使用timeupdown控件了。