我有一个 Button 正在查看 2 个组合框,以确保它们在启用之前具有一个值。问题是我这样做的方式是覆盖我的主题项目中声明的默认样式。
<Button x:Name="btnOK" VerticalAlignment="Center" Content="OK" IsDefault="True" Margin="0" Click="btnOK_Click">
<Button.Style>
<Style BasedOn="{StaticResource DefaultButton}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ddlWageTypes, Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Button.IsEnabled" Value="false"/>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=ddlJobTitles, Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Button.IsEnabled" Value="false"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
我尝试将 BasedOn="{StaticResouce MyDefaultButtonStyleName}" 添加到样式标签,但它在运行时会爆炸。
错误是“'System.Windows.Style'值不能分配给对象'System.Windows.Controls.Button'的属性'Style'。只能基于目标类型为'IFrameworkInputElement'的样式。错误在标记文件中的对象“System.Windows.Style”处”
是否可以在 XAML 中执行此操作而不覆盖默认样式。
编辑:代码示例更新。我在 OKButtonStyle 上收到一条错误消息,提示“无法将元素添加到属性‘资源’,因为如果该属性使用显式集合标记,则它只能有一个子元素。标记文件中的对象‘System.Windows.Style’出现错误”
<UserControl x:Class="UK.Budgeting.XBAP.ShiftDiff.NewFTEPremiumPaySummary"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:compModel="clr-namespace:System.ComponentModel;assembly=WindowsBase"
xmlns:local="clr-namespace:UK.Budgeting.XBAP.ShiftDiff">
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="CellTemplates.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
<Style TargetType="{x:Type Button}" x:Key="OKButtonStyle" BasedOn="{StaticResource DefaultButton}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ddlWageTypes, Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Button.IsEnabled" Value="false"/>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=ddlJobTitles, Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Button.IsEnabled" Value="false"/>
</DataTrigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
<Grid>
<Rectangle Style="{StaticResource DialogRectangle}"/>
<Border Style="{StaticResource DialogBorder}">
<Grid HorizontalAlignment="Center" VerticalAlignment="Center" Background="White">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="5"/>
<ColumnDefinition MinWidth="300"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="2"/>
<RowDefinition/>
<RowDefinition Height="2"/>
<RowDefinition/>
<RowDefinition Height="2"/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Grid.Column="0" Grid.Row="0" Style="{StaticResource LabelStyle}">Wage Type</TextBlock>
<TextBlock Grid.Column="0" Grid.Row="2" Style="{StaticResource LabelStyle}">Job Title</TextBlock>
<ComboBox x:Name="ddlWageTypes" VerticalAlignment="Top" Grid.Column="2" Grid.Row="0"
DisplayMemberPath="DisplayName"
SelectedValuePath="WageTypeCode"/>
<ComboBox x:Name="ddlJobTitles" VerticalAlignment="Top" Grid.Column="2" Grid.Row="2"
DisplayMemberPath="JobTitle"
SelectedValuePath="JobCode"/>
<StackPanel Grid.Column="2" Grid.Row="6" VerticalAlignment="Top" Orientation="Horizontal" Margin="5">
<Button x:Name="btnOK" VerticalAlignment="Center" Content="OK" IsDefault="True" Margin="0" Click="btnOK_Click" Style="{StaticResource OKButtonStyle}"/>
<Button x:Name="btnCancel" VerticalAlignment="Center" Content="Cancel" IsCancel="True" Margin="10,0,0,0" Click="btnCancel_Click"/>
</StackPanel>
</Grid>
</Border>
</Grid>
</UserControl>