綁定為靜態資源

Question

我有以下代碼：

    <!-- Automatically apply icons to context menus based on the header value -->
<Style x:Key="DecoratedMenuItem" TargetType="MenuItem" BasedOn="{StaticResource MenuItem}">
    <Style.Resources>
        <clr:Double x:Key="CanvasSize">16</clr:Double>
        <converters:IgnoreUnderscoresConverter x:Key="IgnoreUnderscoresConverter" />
    </Style.Resources>
    <Style.Triggers>
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Run" Canvas="{StaticResource appbar_control_play}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Edit" Canvas="{StaticResource appbar_edit}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Delete" Canvas="{StaticResource appbar_delete}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Install" Canvas="{StaticResource appbar_social_dropbox_download}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Uninstall" Canvas="{StaticResource appbar_delete}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Advanced" Canvas="{StaticResource appbar_tardis}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Undo" Canvas="{StaticResource appbar_undo}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Redo" Canvas="{StaticResource appbar_redo}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Exit" Canvas="{StaticResource appbar_close}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Close" Canvas="{StaticResource appbar_close}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Copy" Canvas="{StaticResource appbar_page_copy}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Cut" Canvas="{StaticResource appbar_scissor}" />
        <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}" IconSize="{StaticResource CanvasSize}" Value="Paste" Canvas="{StaticResource appbar_clipboard_paste}" />
    </Style.Triggers>
</Style>

為了減少綁定中的某些復制和粘貼，我嘗試在資源字典中創建一個公共綁定作為靜態資源：

    <!-- Automatically apply icons to context menus based on the header value -->
<Style x:Key="DecoratedMenuItem" TargetType="MenuItem" BasedOn="{StaticResource MenuItem}">
    <Style.Resources>
        <clr:Double x:Key="CanvasSize">16</clr:Double>
        <converters:IgnoreUnderscoresConverter x:Key="IgnoreUnderscoresConverter" />
        <Binding x:Key="HeaderBinding"  Path="Header" RelativeSource="{RelativeSource Self}" Converter="{StaticResource IgnoreUnderscoresConverter}" />
    </Style.Resources>
    <Style.Triggers>
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Run" Canvas="{StaticResource appbar_control_play}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Edit" Canvas="{StaticResource appbar_edit}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Delete" Canvas="{StaticResource appbar_delete}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Install" Canvas="{StaticResource appbar_social_dropbox_download}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Uninstall" Canvas="{StaticResource appbar_delete}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Advanced" Canvas="{StaticResource appbar_tardis}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Undo" Canvas="{StaticResource appbar_undo}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Redo" Canvas="{StaticResource appbar_redo}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Exit" Canvas="{StaticResource appbar_close}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Close" Canvas="{StaticResource appbar_close}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Copy" Canvas="{StaticResource appbar_page_copy}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Cut" Canvas="{StaticResource appbar_scissor}" />
        <local:IconTrigger Binding="{StaticResource HeaderBinding}" IconSize="{StaticResource CanvasSize}" Value="Paste" Canvas="{StaticResource appbar_clipboard_paste}" />
    </Style.Triggers>
</Style>

但是我的程序拋出以下異常： 'ResourceDictionary'集合中不能使用'Binding'。 只能在DependencyObject的DependencyProperty上設置“綁定”。

是否有WPF / MVVM可接受的方法來減少這種膨脹（以及由於復制/粘貼而導致錯誤的可能性）？

Answer 1

我認為最好的選擇是重寫IconTrigger類。 它應該存儲值和畫布的集合，因此您可以編寫如下內容：

    <local:IconTrigger Binding="{Binding Header, RelativeSource={RelativeSource Self}, Converter={StaticResource IgnoreUnderscoresConverter}}"  IconSize="{StaticResource CanvasSize}"> 
        <local:IconTriggerValue Value="Run" Canvas="{StaticResource appbar_control_play}" />
        <local:IconTriggerValue Value="Edit" Canvas="{StaticResource appbar_edit}" />
        <local:IconTriggerValue Value="Delete" Canvas="{StaticResource appbar_delete}" />
        <local:IconTriggerValue Value="Install" Canvas="{StaticResource appbar_social_dropbox_download}" />
        <local:IconTriggerValue Value="Uninstall" Canvas="{StaticResource appbar_delete}" />
        <local:IconTriggerValue Value="Advanced" Canvas="{StaticResource appbar_tardis}" />
        <local:IconTriggerValue Value="Undo" Canvas="{StaticResource appbar_undo}" />
        <local:IconTriggerValue Value="Redo" Canvas="{StaticResource appbar_redo}" />
        <local:IconTriggerValue Value="Exit" Canvas="{StaticResource appbar_close}" />
        <local:IconTriggerValue Value="Close" Canvas="{StaticResource appbar_close}" />
        <local:IconTriggerValue Value="Copy" Canvas="{StaticResource appbar_page_copy}" />
        <local:IconTriggerValue Value="Cut" Canvas="{StaticResource appbar_scissor}" />
        <local:IconTriggerValue Value="Paste" Canvas="{StaticResource appbar_clipboard_paste}" />
    </local:IconTrigger>