WPF合併ResourceDictionary與資源綁定到另一個字典中的資源不工作

Question

我創建了一個簡單的項目，演示我遇到的問題，我得到的錯誤： '在'System.Windows.Markup.StaticResourceHolder'上提供值'拋出一個例外。「行號「6」和行位置「9」。

項目佈局非常簡單，我把它上傳到Dropbox的： https://www.dropbox.com/s/451b5zkw8oqgcld/StyleTest1.zip?dl=0

MainWindow.xaml

<Window x:Class="StyleTest1.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     Title="MainWindow" Height="350" Width="525"> 
    <Window.Resources> 
     <ResourceDictionary> 
      <ResourceDictionary.MergedDictionaries> 
       <ResourceDictionary Source="Dictionary1.xaml" /> 
       <ResourceDictionary Source="Dictionary2.xaml" /> 
      </ResourceDictionary.MergedDictionaries> 
      <Style x:Key="ButtonStyle1" TargetType="{x:Type Button}"> 
       <Setter Property="Background" Value="{DynamicResource Button.Static.Background}"/> 
      </Style> 
     </ResourceDictionary> 
    </Window.Resources> 
    <Grid> 
     <Button x:Name="button" Content="Button" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Style="{DynamicResource ButtonStyle1}"> 

     </Button> 
    </Grid> 
</Window> 

Dictionary1.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:po="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> 

    <GradientStopCollection po:Freeze="true" x:Key="ButtonBackgroundStops"> 
     <GradientStop Color="#2d2d2f"/> 
     <GradientStop Color="#2d2d2f" Offset="1"/> 
    </GradientStopCollection> 

    <LinearGradientBrush 
     po:Freeze="true"  
     x:Key="ButtonBackgroundBrush"   
     GradientStops="{StaticResource ButtonBackgroundStops}" 
     StartPoint="0.5,-0.05" 
     EndPoint="0.5,0.66" /> 

</ResourceDictionary> 

Dictionary2.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> 

    <LinearGradientBrush 
     x:Key="Button.Static.Background" 
     GradientStops="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=GradientStops}" 
     StartPoint="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=StartPoint}" 
     EndPoint="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=EndPoint}"/> 

</ResourceDictionary> 

就是這樣...如果我運行該程序，我得到的錯誤： '在'System.Windows.Markup.StaticResourceHolder'上提供值引發了一個異常。'行號「6」和行位置「9」。

但是，如果我改變MainWindow.xaml到下面我不再獲得問題： 這裏是Dropbox的鏈接，修改後的版本： https://www.dropbox.com/s/ceikh5b8cfecdkw/StyleTest2.zip?dl=0

MainWindow.xaml

<Window x:Class="StyleTest2.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:local="clr-namespace:StyleTest2" 
     mc:Ignorable="d" 
     Title="MainWindow" Height="350" Width="525"> 
    <Window.Resources> 
     <ResourceDictionary> 
      <ResourceDictionary.MergedDictionaries> 
       <ResourceDictionary Source="Dictionary1.xaml" /> 
       <ResourceDictionary Source="Dictionary2.xaml" /> 
      </ResourceDictionary.MergedDictionaries> 
      <LinearGradientBrush 
       x:Key="Button.Static.Background" 
       GradientStops="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=GradientStops}" 
       StartPoint="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=StartPoint}" /> 
      <Style x:Key="ButtonStyle1" TargetType="{x:Type Button}"> 
       <Setter Property="Background" Value="{DynamicResource Button.Static.Background}"/> 
      </Style> 
     </ResourceDictionary> 
    </Window.Resources> 
    <Grid> 
     <Button x:Name="button" Content="Button" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Style="{DynamicResource ButtonStyle1}"> 

     </Button> 
    </Grid> 
</Window> 

哪會建議它與Dictionary2.xaml中的LinearGradientBrush綁定到位於Dictionary1.xaml中的ButtonBackgroundBrush資源時出現問題。

任何人都可以告訴我我在做什麼錯在這裏，什麼是正確的方法來在一個字典中的資源引用另一個字典中的資源？

感謝您的時間，

codeOwl

Answer 1

1. 使用DynamicResource就地在Dictionary2 StaticResource，

   或Dictionary2

2. 合併字典1，那麼就贏了沒有任何問題。

Dictionary2看起來像：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> 

    <ResourceDictionary.MergedDictionaries> 
     <ResourceDictionary Source="Dictionary1.xaml"/> 
    </ResourceDictionary.MergedDictionaries> 

    <LinearGradientBrush 
     x:Key="Button.Static.Background" 
     GradientStops="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=GradientStops}" 
     StartPoint="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=StartPoint}" 
     EndPoint="{Binding Source={StaticResource ButtonBackgroundBrush}, Path=EndPoint}"/> 

</ResourceDictionary>