我有一个WPF应用程序,它使用DataGrid
控件并由警察在警车中使用。我使用合并字典来实现日夜模式,其中当您在两者之间切换程序时,调色板会发生变化。应用程序收集我公司制造的特殊传感器的数据并显示给高级职员。DataGridRow的背景属性是错误的
问题DataGrid
行为奇怪。程序第一次启动时,它最初是空的。随着数据的收集,行被添加到DataGrid
。当您启动程序时,它最初处于日间模式。问题是第一行的背景不会更改为控件的夜间模式颜色。它保持白色,这是白天模式的颜色。如果您在日间模式和夜间模式之间来回切换,则会保持白色。
这与添加到DataGrid
之后的任何行不同,后者具有正确的颜色并在颜色之间来回切换。
下面是我在我的App.xaml定义的DataGridRow
类风格:
<Application x:Class="MyApplication.App"
. . .>
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MyApplication;component/DayTime.xaml" />
<ResourceDictionary>
. . .
<Style TargetType="{x:Type DataGridRow}">
<Setter Property="BorderBrush" Value="{DynamicResource DataBorder}" />
<Setter Property="Background" Value="{DynamicResource DataBackground}" />
<Setter Property="Foreground" Value="{DynamicResource DataForeground}" />
<Style.Triggers>
<Trigger Property="IsFocused" Value="True">
<Setter Property="Background" Value="{DynamicResource DataBackground}" />
<Setter Property="BorderBrush" Value="{DynamicResource DataBorderFocused}" />
<Setter Property="Foreground" Value="{DynamicResource DataForeground}" />
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="True">
<Setter Property="Background" Value="{DynamicResource DataBackground}" />
<Setter Property="BorderBrush" Value="{DynamicResource DataBorderFocused}" />
<Setter Property="Foreground" Value="{DynamicResource DataForeground}" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{DynamicResource DataBackgroundSelected}" />
<Setter Property="BorderBrush" Value="{DynamicResource DataBorderSelected}" />
<Setter Property="Foreground" Value="{DynamicResource DataForegroundSelected}" />
</Trigger>
</Style.Triggers>
</Style>
. . .
</ResourceDictionary>
</ResourceDictionary>
</ResourceDictionary>
</Application.Resources>
</Application>
当我在程序运行snoop并深入到有问题的DataGridRow
,该Background
属性的值是白(#FFFFFFFF),并将其值设置为“DefaultStyle”。但这似乎不是我定义的样式,因为当我切换到白天模式&时,它不会改变。我认为这是微软定义的默认样式,它根本不使用我的样式。但是只有在插入DataGrid
的第一行中,如果它最初是空的。
对于后续行,“值来源”列显示“ParentTemplate”。这一定是我的风格,因为当您切换夜间模式时,背景颜色会发生适当变化。
如何解决这个问题,使DataGrid
中的每一行都正确?
编辑:
在完整性的利益,这里是由DataGrid
控制使用的样式,在情况下,它可以帮助。
<Style TargetType="{x:Type DataGrid}">
<Setter Property="Background" Value="{DynamicResource DataBackground}" />
<Setter Property="Foreground" Value="{DynamicResource TextForeground}" />
<Setter Property="BorderBrush" Value="{DynamicResource DataBorder}" />
<Setter Property="BorderThickness" Value="1" />
<Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected" />
<Setter Property="ScrollViewer.CanContentScroll" Value="true" />
<Setter Property="ScrollViewer.PanningMode" Value="Both" />
<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGrid}">
<Border BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
Padding="{TemplateBinding Padding}"
SnapsToDevicePixels="True">
<ScrollViewer x:Name="DG_ScrollViewer" Focusable="false">
<ScrollViewer.Template>
<ControlTemplate TargetType="{x:Type ScrollViewer}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Button Command="{x:Static DataGrid.SelectAllCommand}"
Focusable="false"
Style="{DynamicResource {ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle, TypeInTargetAssembly={x:Type DataGrid}}}"
Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.All}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
<DataGridColumnHeadersPresenter Grid.Column="1"
x:Name="PART_ColumnHeadersPresenter"
Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Column}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter"
CanContentScroll="{TemplateBinding CanContentScroll}"
Grid.ColumnSpan="2"
Grid.Row="1" />
<ScrollBar x:Name="PART_VerticalScrollBar"
Grid.Column="2"
Maximum="{TemplateBinding ScrollableHeight}"
Orientation="Vertical"
Grid.Row="1"
Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"
ViewportSize="{TemplateBinding ViewportHeight}"
MinWidth="45" Width="50" />
<Grid Grid.Column="1"
Grid.Row="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ScrollBar x:Name="PART_HorizontalScrollBar"
Grid.Column="1"
Maximum="{TemplateBinding ScrollableWidth}"
Orientation="Horizontal"
Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"
Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"
ViewportSize="{TemplateBinding ViewportWidth}" />
</Grid>
</Grid>
</ControlTemplate>
</ScrollViewer.Template>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ScrollViewer>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false" />
</Trigger>
</Style.Triggers>
</Style>
编辑:
作为expermient,我加入该成员变量与问题的窗口的代码隐藏:
private static Style dataGridRowStyle = null;
然后,我添加此代码的构造我的窗口:
if (dataGridRowStyle == null) {
dataGridRowStyle = FindResource(typeof(DataGridRow)) as Style;
MyGrid.RowStyle = dataGridRowStyle;
}
通过这样做,我看到每行添加到DataGrid
公顷d原始的默认样式。当我将上面的代码移动到Loaded
事件处理程序时,这也发生了。
接下来,我删除了上面的代码,并将一个x:Key属性添加到了app.xaml文件中的Style
定义中。然后我加入这个属性到DataGrid
控制的定义:
RowStyle={DynamicResource MyDataGridRowStyle}
现在每行有我的风格。这很好,但我认为只用TargetType
属性声明我的样式足以让它适用于所有行。为什么不呢?