Question

我有WPF application和ListView。在这个ListView我添加我的对象，其中包含几个属性：文件名，ID和进度（简单ProgressBar列）。

所以这是我的ItemContainerStyle之前尝试添加一些style更改，例如在鼠标结束时更改颜色：

<ListView.ItemContainerStyle>
        <Style TargetType="{x:Type ListViewItem}">
            <Setter Property="Background" Value="Transparent" />
            <Setter Property="Foreground" Value="White" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListViewItem}">
                        <Border
                 BorderBrush="White"
                 BorderThickness="0"
                 Background="{TemplateBinding Background}">
                            <GridViewRowPresenter HorizontalAlignment="Stretch"
                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                              Width="Auto" Margin="0" Content="{TemplateBinding Content}"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ListView.ItemContainerStyle>

现在这是我ItemContainerStyle之后的当前状态：

<Style TargetType="{x:Type ListViewItem}">
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="SnapsToDevicePixels" Value="True"/>
            <Setter Property="Padding" Value="4,1"/>
            <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListViewItem}">
                      <Border
             BorderBrush="White"
             BorderThickness="0"
             Background="{TemplateBinding Background}">
                        <GridViewRowPresenter HorizontalAlignment="Stretch"
                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                          Width="Auto" Margin="0" Content="{TemplateBinding Content}"/>
                    </Border>
                        <ControlTemplate.Triggers>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsMouseOver" Value="True"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                <Setter Property="BorderBrush" TargetName="Bd" Value="White"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="Selector.IsSelectionActive" Value="False"/>
                                    <Condition Property="IsSelected" Value="True"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                <Setter Property="BorderBrush" TargetName="Bd" Value="Blue"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="Selector.IsSelectionActive" Value="True"/>
                                    <Condition Property="IsSelected" Value="True"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                <Setter Property="BorderBrush" TargetName="Bd" Value="Blue"/>
                            </MultiTrigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

所以现在我想要改变的工作正常，但是在添加我的对象之后，我只能在我的ListView内看到只有NameSpace.Classname的项目而我的所有Object properties都消失了。那我做错了什么？

这是我通过代码添加我的对象的方式：

public ObservableCollection<MyData> MyObjectsCollections{ get; set; }

lvFiles.ItemsSource = MyObjectsCollections;

我也尝试：

lvFiles.Items.Add(...);

编辑：

这是我的所有ListView代码：

    <ListView Name="lvFiles" Margin="16,453,0,40" Background="Transparent" BorderThickness="0" 
              ItemsSource="{Binding dataList}" >
        <ListView.ItemContainerStyle>
            <Style TargetType="{x:Type ListViewItem}">
                <Setter Property="Foreground" Value="White"/>
                <Setter Property="SnapsToDevicePixels" Value="True"/>
                <Setter Property="Padding" Value="4,1"/>
                <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
                <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="BorderBrush" Value="Transparent"/>
                <Setter Property="BorderThickness" Value="1"/>
                <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ListViewItem}">
                            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </Border>
                            <ControlTemplate.Triggers>
                                <MultiTrigger>
                                    <MultiTrigger.Conditions>
                                        <Condition Property="IsMouseOver" Value="True"/>
                                    </MultiTrigger.Conditions>
                                    <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                    <Setter Property="BorderBrush" TargetName="Bd" Value="White"/>
                                </MultiTrigger>
                                <MultiTrigger>
                                    <MultiTrigger.Conditions>
                                        <Condition Property="Selector.IsSelectionActive" Value="False"/>
                                        <Condition Property="IsSelected" Value="True"/>
                                    </MultiTrigger.Conditions>
                                    <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                    <Setter Property="BorderBrush" TargetName="Bd" Value="Blue"/>
                                </MultiTrigger>
                                <MultiTrigger>
                                    <MultiTrigger.Conditions>
                                        <Condition Property="Selector.IsSelectionActive" Value="True"/>
                                        <Condition Property="IsSelected" Value="True"/>
                                    </MultiTrigger.Conditions>
                                    <Setter Property="Background" TargetName="Bd" Value="Transparent"/>
                                    <Setter Property="BorderBrush" TargetName="Bd" Value="#FF15669E"/>
                                </MultiTrigger>
                                <Trigger Property="IsEnabled" Value="False">
                                    <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListView.ItemContainerStyle>
        <ListView.Resources>
            <DataTemplate x:Key="MyDataTemplate">
                <Grid Margin="-6">
                    <ProgressBar Name="prog" Maximum="100" Value="{Binding Progress}" 
                                 Width="{Binding Path=Width, ElementName=ProgressCell}" 
                                 Height="16" Margin="0" Background="#FFD3D0D0" Style="{StaticResource CustomProgressBar}"/>
                    <TextBlock Text="{Binding Path=Value, ElementName=prog, StringFormat={}{0}%}" VerticalAlignment="Center"
                               HorizontalAlignment="Center" FontSize="11" Foreground="Black" />
                </Grid>
            </DataTemplate>
            <ControlTemplate x:Key="ProgressBarTemplate">
                <Label  HorizontalAlignment="Center" VerticalAlignment="Center" />
            </ControlTemplate>
        </ListView.Resources>
        <ListView.View>
            <GridView ColumnHeaderContainerStyle="{StaticResource ListViewHeaderStyle}">
                <!-- file name column -->
                <GridViewColumn Width="500" Header="File name" DisplayMemberBinding="{Binding FileName}" />

                <!-- duration column -->
                <GridViewColumn Width="60" Header="Duration" DisplayMemberBinding="{Binding Duration}" />

                <!-- packets column -->
                <GridViewColumn Width="80" Header="Packets" DisplayMemberBinding="{Binding Packets}" />

                <!-- progress column -->
                <GridViewColumn x:Name="ProgressCell"  Width="50" Header="Progress" CellTemplate="{StaticResource MyDataTemplate}" />
            </GridView>
        </ListView.View>

Answer 1

问题不在于触发器，而是您通过ControlTemplate设置ListViewItem外观 - 但随后尝试将ListView.View设置为GridView - 这需要数据绑定。

看起来您正在尝试删除鼠标悬停的视觉效果，并在选择时设置蓝色边框。

您可以实现此操作，删除ListViewItem模板设置器并将触发器移动到ListViewItem级别：

<ListView.ItemContainerStyle>
    <Style TargetType="{x:Type ListViewItem}">
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Padding" Value="4,1"/>
        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
        <Style.Triggers>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="IsMouseOver" Value="True"/>
                </MultiTrigger.Conditions>
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="BorderBrush" Value="White"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Selector.IsSelectionActive" Value="False"/>
                    <Condition Property="IsSelected" Value="True"/>
                </MultiTrigger.Conditions>
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="BorderBrush" Value="Blue"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Selector.IsSelectionActive" Value="True"/>
                    <Condition Property="IsSelected" Value="True"/>
                </MultiTrigger.Conditions>
                <Setter Property="Background" Value="Transparent"/>
                <Setter Property="BorderBrush" Value="#FF15669E"/>
            </MultiTrigger>
            <Trigger Property="IsEnabled" Value="False">
                <Setter Property="TextElement.Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
            </Trigger>
        </Style.Triggers>
    </Style>
</ListView.ItemContainerStyle>

WPF：添加几个触发器使我的Object属性消失

1 个答案: