WPF ListView高亮显示颜色不变 [英] WPF ListView Highlight Color don't change
本文介绍了WPF ListView高亮显示颜色不变的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个ListView，每个项目具有三个TextBlock. 第一个具有默认颜色(黑色)，其他一个具有前景"属性设置为灰色.
当我选择一个项目时，第一个TextBlock的颜色变为蓝色，而其他文本保持灰色，难以阅读.
我希望选中该项目时所有文本都变为白色. 我该怎么做?
我的风格:
<UserControl.Resources>
<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" Value="White"/>
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
我的ListView
<ListView x:Name="lvResultat" Grid.Row="0" Grid.Column="1" Background="{x:Null}"
Margin="4"
HorizontalContentAlignment="Stretch"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ResultatsRecherche}" SelectedItem="{Binding ResultatSelectione, Mode=TwoWay}" BorderBrush="{x:Null}" MouseDoubleClick="lvResultat_MouseLeftDoubleClick" >
<ListView.ItemTemplate>
<DataTemplate DataType="viewModel:ResultatRechercheViewModel">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis"
Foreground="Gray"/>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
我也尝试过
<Style TargetType="ListViewItem">
<Style.Resources>
<!--<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="White" />-->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="White" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="White" />
</Style.Resources>
</Style>
我发现自定义样式更改了Textblock的颜色，该文本块的默认属性为Foreground(黑色). 如果我将黑色指定为第一个文本块的文本颜色，则选中该项目后文本的颜色将不再改变.
图片:
解决方案
通过将代码从具有DataTemplate的ListViewItem转换为具有ControlTemplate
这是我尝试过的:
ListViewItem样式:
<Style TargetType="ListViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border x:Name="ContentBorder"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Margin="4">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1" Name="st"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis" Name="r"
Foreground="Gray"/>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" TargetName="st" Value="White" />
<Setter Property="Foreground" TargetName="r" Value="White" />
<Setter Property="Background" TargetName="ContentBorder" Value="DeepSkyBlue" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后我从ListView XAML中删除了DataTemplate:
<ListView x:Name="lvResultat" Grid.Row="0" Grid.Column="1" Background="{x:Null}"
Margin="4"
HorizontalContentAlignment="Stretch"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ResultatsRecherche}" SelectedItem="{Binding ResultatSelectione, Mode=TwoWay}" BorderBrush="{x:Null}" >
</ListView>
但是，如果必须使用DateTemplate，则可以做的是在ViewModel，ResultatRechercheViewModel上具有一个名为IsSelected的属性，然后在DataTemplate中的该属性上具有DataTriggers.
更新的数据模板:
<ListView.ItemTemplate>
<DataTemplate DataType="viewModel:ResultatRechercheViewModel">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1" Name="st"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis" Name="r"
Foreground="Gray"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsSelected}" Value="True">
<Setter Property="Foreground" TargetName="st" Value="White" />
<Setter Property="Foreground" TargetName="r" Value="White" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ListView.ItemTemplate>
并且，您需要更新您的ViewModel代码以设置IsSelected属性，以下是来自MainViewModel的代码:
public ResultatRechercheViewModel ResultatSelectione
{
get { return _resultatSelectione; }
set
{
if (_resultatSelectione != null)
{
_resultatSelectione.IsSelected = false;
}
_resultatSelectione = value;
_resultatSelectione.IsSelected = true;
}
}
希望这可以解决您的问题或为您提供一些解决问题的想法.
I have a ListView with three TextBlock for each Item. The first one has the default color (black) and the others has the property Foreground set to gray.
When I select an item the color of the first TextBlock becomes blue but the others stay gray and are hard to read.
I want that all the text become white color when the item is selected. How I do that ?
Edit : My style :
<UserControl.Resources>
<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" Value="White"/>
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
My ListView
<ListView x:Name="lvResultat" Grid.Row="0" Grid.Column="1" Background="{x:Null}"
Margin="4"
HorizontalContentAlignment="Stretch"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ResultatsRecherche}" SelectedItem="{Binding ResultatSelectione, Mode=TwoWay}" BorderBrush="{x:Null}" MouseDoubleClick="lvResultat_MouseLeftDoubleClick" >
<ListView.ItemTemplate>
<DataTemplate DataType="viewModel:ResultatRechercheViewModel">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis"
Foreground="Gray"/>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I also tried things like
<Style TargetType="ListViewItem">
<Style.Resources>
<!--<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="White" />-->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="White" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="White" />
</Style.Resources>
</Style>
EDIT 2 : I have discovered that the custom style changes the color of Textblock which have the default property as Foreground (black). If I specife Black for the color of the text of the first textblock, the text doesn't change anymore of color when the item is selected.
Picture :
解决方案
You could achieve what you are trying to do by converting your code from having DataTemplate for a ListViewItem to having a ControlTemplate
This is what I tried:
ListViewItem Style:
<Style TargetType="ListViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border x:Name="ContentBorder"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Margin="4">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1" Name="st"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis" Name="r"
Foreground="Gray"/>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" TargetName="st" Value="White" />
<Setter Property="Foreground" TargetName="r" Value="White" />
<Setter Property="Background" TargetName="ContentBorder" Value="DeepSkyBlue" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
and then I removed DataTemplate from the ListView XAML:
<ListView x:Name="lvResultat" Grid.Row="0" Grid.Column="1" Background="{x:Null}"
Margin="4"
HorizontalContentAlignment="Stretch"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding ResultatsRecherche}" SelectedItem="{Binding ResultatSelectione, Mode=TwoWay}" BorderBrush="{x:Null}" >
</ListView>
However, if you must use DateTemplate, then what you could do is have a property called IsSelected on your ViewModel, ResultatRechercheViewModel and then have DataTriggers on that property in your DataTemplate.
Updated DataTemplate:
<ListView.ItemTemplate>
<DataTemplate DataType="viewModel:ResultatRechercheViewModel">
<Grid Height="86" Margin="2" >
<Grid.RowDefinitions>
<RowDefinition Height="1.5*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="0.5*"/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Titre}"
FontSize="20" FontWeight="Bold" />
<TextBlock Text="{Binding SousTitre}" Grid.Row="1" Name="st"
FontStyle="Italic" Foreground="Gray"/>
<TextBlock Text="{Binding Resume}" Grid.Row="2" TextTrimming="WordEllipsis" Name="r"
Foreground="Gray"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsSelected}" Value="True">
<Setter Property="Foreground" TargetName="st" Value="White" />
<Setter Property="Foreground" TargetName="r" Value="White" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ListView.ItemTemplate>
And, you need to update your ViewModel code to set IsSelected property, Below is code from my MainViewModel:
public ResultatRechercheViewModel ResultatSelectione
{
get { return _resultatSelectione; }
set
{
if (_resultatSelectione != null)
{
_resultatSelectione.IsSelected = false;
}
_resultatSelectione = value;
_resultatSelectione.IsSelected = true;
}
}
Hope this resolves your problem or gives you some ideas to resolve your problem.
这篇关于WPF ListView高亮显示颜色不变的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
