如何访问在样式父控件的属性 [英] How to access controls parent's property in a style

问题描述

我的列表视图具有datatemplated作为标签的物品。我设计了该标签的风格，我不知道如何访问父（ListViewItem的）IsSelected属性。

编辑 - 尝试下面的建议，但仍得到一个例外，这是我完全code：

 ＆LT;风格X：键=ListViewItemStyle的TargetType =ListViewItem的＆GT;
                ＆LT; setter属性=SnapsToDevicePixelsVALUE =真/＆GT;
                ＆LT; setter属性=OverridesDefaultStyleVALUE =真/＆GT;
                ＆LT; setter属性=模板＆GT;
                    ＆LT; Setter.Value＆GT;
                        ＆LT;的ControlTemplate的TargetType =ListViewItem的＆GT;
                            ＆LT; BORDER BorderBrush ={TemplateBinding BorderBrush}了borderThickness ={TemplateBinding了borderThickness}后台={TemplateBinding背景}填充={TemplateBinding填充}SnapsToDevicePixels =真＆GT;
                                ＆LT; GridViewRow presenter的Horizo​​ntalAlignment ={TemplateBinding Horizo​​ntalContentAlignment}SnapsToDevicePixels ={TemplateBinding SnapsToDevicePixels}VerticalAlignment ={TemplateBinding VerticalContentAlignment}/＆GT;
                            ＆LT; /边框＆GT;
                        ＆LT; /控件模板＆GT;
                    ＆LT; /Setter.Value>
                ＆LT; /二传手＆GT;
                ＆LT; Style.Triggers＆GT;
                    ＆LT;触发属性=IsSelectedVALUE =真＆GT;
                        ＆LT; setter属性=背景VALUE ={StaticResource的WindowBorderBrush}/＆GT;
                        ＆LT; setter属性=前景VALUE =白/＆GT;
                    ＆LT; /触发＆GT;
                ＆LT; /Style.Triggers>
            ＆LT; /样式和GT;
            ＆LT;风格X：键=GVLabelStyle
                   支持算法FMP ={StaticResource的LabelStyle}
                   的TargetType =标签＆GT;
                ＆LT; Style.Triggers＆GT;
                    ＆LT; MultiDataTrigger＆GT;
                        ＆LT; MultiDataTrigger.Conditions＆GT;
                            ＆lt;条件属性={绑定路径= IsSelected，的RelativeSource = {的RelativeSource FindAncestor}}VALUE =真/＆GT;
                        ＆LT; /MultiDataTrigger.Conditions>
                        ＆LT; setter属性=前景VALUE =白/＆GT;
                    ＆LT; / MultiDataTrigger＆GT;
                ＆LT; /Style.Triggers>
            ＆LT; /样式和GT;            ＆LT;的DataTemplate X：键=appTemplate＆GT;
                ＆LT;标签样式={StaticResource的GVLabelStyle}
                       CONTENT ={结合ProcessInfo.ProcessName}＆GT;
                               ＆LT; /标签＆gt;
            ＆LT; / DataTemplate中＆GT; ＆LT; ListView的背景=透明
                  NAME =mainContentHolder
                  的ItemsSource ={结合}
                  BorderBrush =透明
                  ItemContainerStyle ={StaticResource的ListViewItemStyle}＆GT;
                ＆LT; ListView.View＆GT;
                ＆LT; GridView的ColumnHeaderContainerStyle ={StaticResource的HeaderStyle}＆GT;
                    ＆LT; GridViewColumn标题=应用程序
                                    CellTemplate ={StaticResource的appTemplate}/＆GT;
                    ＆LT; GridViewColumn标题=窗口标题
                                    CellTemplate ={StaticResource的wndTemplate}
                                    WIDTH =300/＆GT;
                    ＆LT; GridViewColumn标题=日期
                                    CellTemplate ={StaticResource的dateTemplate}/＆GT;                ＆LT; / GridView的＆GT;
            ＆LT; /ListView.View>        ＆LT; /＆的ListView GT;
 

解决方案

您应该能够使用的的RelativeSource ：

 ＆lt;条件属性={绑定路径= IsSelected，的RelativeSource = {的RelativeSource TemplatedParent}}VALUE =真/＆GT;
 

编辑：
尝试使用 MultiDataTrigger ，而不是 MultiTrigger 为好。检查<一href=\"http://stackoverflow.com/questions/4649906/wpf-condition-binding-versus-property-xamlparseexception-using-either\">this.

My Listview has items datatemplated as a label. I'm designing a style for that label and I don't know how to access the parent's(ListViewItem) IsSelected property.

EDIT - tried the suggestions below, but still getting an exception, here's my complete code:

 <Style x:Key="ListViewItemStyle" TargetType="ListViewItem">
                <Setter Property="SnapsToDevicePixels" Value="true"/>
                <Setter Property="OverridesDefaultStyle" Value="true"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ListViewItem">
                            <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                <GridViewRowPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </Border>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
                <Style.Triggers>
                    <Trigger Property="IsSelected" Value="True">
                        <Setter Property="Background" Value="{StaticResource WindowBorderBrush}"/>
                        <Setter Property="Foreground" Value="White"/>
                    </Trigger>
                </Style.Triggers>
            </Style>
            <Style x:Key="GVLabelStyle"
                   BasedOn="{StaticResource LabelStyle}"
                   TargetType="Label">
                <Style.Triggers>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition  Property="{Binding Path=IsSelected, RelativeSource={RelativeSource FindAncestor}}" Value="True"/>
                        </MultiDataTrigger.Conditions>            
                        <Setter Property="Foreground" Value="White"/>
                    </MultiDataTrigger>
                </Style.Triggers>
            </Style>

            <DataTemplate x:Key="appTemplate">
                <Label Style="{StaticResource GVLabelStyle}"
                       Content="{Binding ProcessInfo.ProcessName}">
                               </Label>
            </DataTemplate>  

 <ListView Background="Transparent"
                  Name="mainContentHolder"
                  ItemsSource="{Binding}"
                  BorderBrush="Transparent"
                  ItemContainerStyle="{StaticResource ListViewItemStyle}">
                <ListView.View>
                <GridView ColumnHeaderContainerStyle="{StaticResource HeaderStyle}">
                    <GridViewColumn Header="Application" 
                                    CellTemplate="{StaticResource appTemplate}"/>
                    <GridViewColumn Header="Window Title"
                                    CellTemplate="{StaticResource wndTemplate}"
                                    Width="300"/>
                    <GridViewColumn Header="Date"
                                    CellTemplate="{StaticResource dateTemplate}"/>

                </GridView>
            </ListView.View>

        </ListView>

解决方案

You should be able to use RelativeSource:

<Condition Property="{Binding Path=IsSelected, RelativeSource={RelativeSource TemplatedParent}}" Value="True" />

EDIT: Try a using a MultiDataTrigger instead of a MultiTrigger as well. Check this.

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