WPF UserControl:自定义样式的 TargetType 的客户端验证?

WPF UserControl: Client-side validation of TargetType for custom styles?

我有一个 UserControl 多用途。 为了简单起见,我先给大家看一下控件:

<UserControl x:Class="CompetitionAgent.View.UserControls.ExpandingButtonGrid"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" d:DesignWidth="200" d:DesignHeight="200"
             Margin="0" Padding="0" Width="Auto" Height="Auto" >
    <StackPanel Name="stpBody" Style="{Binding Style}">
        <Button x:Name="btnExpander" Content="{Binding ExpanderButtonText}"
                Style="{Binding ExpandButtonStyle}"
                HorizontalAlignment="Center" Click="btnExpander_Click"
                Height="25" Width="Auto" />
        <StackPanel x:Name="stpButtons" Orientation="Horizontal" 
                    Style="{Binding PanelStyle}"
                    Margin="0">
        </StackPanel>
    </StackPanel>
</UserControl>

控件 stpBodystpButtonsbtnExpander 都具有受 DataContext 约束的样式。字段如下所示:

#region body styles
public Style Style { get; set; }
public Style ExpandButtonStyle { get; set; }
#endregion body styles

#region button pannel styles
public Style PanelStyle { get; set; }
public Style ButtonStyle { get; set; }
#endregion button pannel styles 

所以当这个 UserControl 用于另一个 window 时,它看起来有点像这样:

<UserControls:ExpandingButtonGrid x:Name="ebgSchemeManager" 
                                  Style="{StaticResource ExpandingButtonGridStyle}" 
                                  PanelStyle="{StaticResource ExpandingButtonGridPanelStyle}" 
                                  ExpandButtonStyle="{StaticResource ExpandingButtonGridExpandButtonStyle}" />

我想知道,有没有一种方法可以验证 StaticResource 样式的 TargetTypes,以便它们分别针对堆栈面板或按钮?

例如,样式 ExpandingButtonGridExpandButtonStyle 可能以 DockPanel 为目标,导致在运行时出现 XAML 解析异常。

更新 - 依赖对象的总结和更新

我刚刚弄清楚 DepencyObjects 是什么(万岁!)。 对于那些想知道的人,您需要注册该字段,以便可以动态分配 属性。

public static readonly DependencyProperty ExpandButtonStyleProperty =
    DependencyProperty.Register("ExpandButtonStyle", typeof(Style), typeof(ExpandingButtonPanel));

public Style ExpandButtonStyle
{
    get
    {
        return (Style)GetValue(ExpandButtonStyleProperty);
    }
    set
    {
        if (!typeof(Button).IsAssignableFrom(value.TargetType))
        {
            throw new ArgumentException("The target type is expected to be button");
        }
        SetValue(ExpandButtonStyleProperty, value);
    }
}

当然有。您可以在 setter 中验证 Style.TargetType。这也将由 WPF 设计器检查。

例如:

private Style _buttonStyle;
public Style ButtonStyle 
{ 
    get 
    {
        return _buttonStyle;
    }
    set 
    { 
        if (!typeof(Button).IsAssignableFrom(value.TargetType))
        {
            throw new ArgumentException("The target type is expected to be Button");
        } 
        _buttonStyle = value;
    } 
}