窗口背景VisualBrush DynamicResource

我有两个项目，一个资源库，它包含一个xaml文件，里面只有一个名为Theme的键 . 在这个元素里面是Visual元素，依此类推 . 我的主要项目是像这样拉入xaml文件

<Window.Background>
    <VisualBrush Visual={DynamicResource Theme}" />
</Window.Background

如果我手动将xaml代码放在这个区域，它的工作完美，但我希望用户能够翻阅不同的xaml“主题” . 问题是，现在因为xaml文件中的visualbrush具有key属性，visual属性不会转换为visualbrush ......显然......有没有办法将visualbrush设置为xaml中visualbrush元素的dynamicresource资源库中的文件？这会产生我想要达到的效果 . 谢谢 .

EDIT

主窗口

<Window x:Class="OASYS_View.MainWindow"
    Name="V_Window"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="clr-namespace:ResourceLibrary;assembly=ResourceLibrary"
    controls:ThemeManager.Theme="{Binding ElementName=themes, Path=SelectedItem}"
    Title="V" Height="1080" Width="1920"
    WindowStyle="None"
    AllowsTransparency="True"
    ResizeMode="NoResize">
<Window.Background>
    <VisualBrush Visual="{DynamicResource Theme}" />
</Window.Background>
<Window.Triggers>
    <EventTrigger RoutedEvent="Window.Loaded">
        <BeginStoryboard>
            <Storyboard Name="WindowFade" Completed="WindowFade_Completed">
                <DoubleAnimation  Name="WindowFadeAnimation"
                                        Storyboard.TargetName="V_Window"
                                        Storyboard.TargetProperty="(Window.Opacity)"
                                        From="0.0" To="1.0" Duration="0:0:1"
                                        AutoReverse="False" RepeatBehavior="1x"
                                        />
            </Storyboard>
        </BeginStoryboard>
    </EventTrigger>
    <EventTrigger RoutedEvent="Window.Unloaded">
        <BeginStoryboard>
            <Storyboard Name="WindowFadeOut" Completed="WindowFadeOut_Completed">
                <DoubleAnimation  Name="WindowFadeOutAnimation"
                                        Storyboard.TargetName="V_Window"
                                        Storyboard.TargetProperty="(Window.Opacity)"
                                        From="1.0" To="0.0" Duration="0:0:1"
                                        AutoReverse="False" RepeatBehavior="1x"
                                        />
            </Storyboard>
        </BeginStoryboard>
    </EventTrigger>
</Window.Triggers>
<Grid>
    <ComboBox x:Name="themes" Width="150" Height="20" SelectionChanged="themes_SelectionChanged" SelectedIndex="0" />
    <controls:ProgressIndicator x:Name="Progress" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,50" Foreground="White" />
</Grid>

主题xaml文件

<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:ResourceLibrary">

<VisualBrush x:Key="Theme">
    <VisualBrush.Visual>
        <Viewbox Width="1920" Height="1080">
            <Canvas x:Name="PART_Canvas" Width="1920" Height="1080">
                <Canvas>
                    <Path Data="F1 M 1920.000,1079.906 L 0.000,1080.000 L 0.000,0.094 L 1920.000,0.000 L 1920.000,1079.906 Z">
                        <Path.Fill>
                            <LinearGradientBrush MappingMode="Absolute" StartPoint="959.917,-1324.218" EndPoint="959.916,-55.456">
                                <LinearGradientBrush.GradientStops>
                                    <GradientStop Offset="0.00" Color="#ff5090cd"/>
                                    <GradientStop Offset="0.66" Color="#ff5090cd"/>
                                    <GradientStop Offset="0.76" Color="#ff5090cd"/>
                                    <GradientStop Offset="0.95" Color="#ff287bbf"/>
                                    <GradientStop Offset="1.00" Color="#ff0067b1"/>
                                </LinearGradientBrush.GradientStops>
                                <LinearGradientBrush.Transform>
                                    <MatrixTransform Matrix="1.000,0.000,-0.000,-1.000,0.084,0.631" />
                                </LinearGradientBrush.Transform>
                            </LinearGradientBrush>
                        </Path.Fill>
                    </Path>
                    <Path Data="F1 M 1920.000,1080.789 L 0.001,1080.789 L 0.001,983.908 L 1920.000,983.908 L 1920.000,1080.789 Z">
                        <Path.Fill>
                            <LinearGradientBrush MappingMode="Absolute" StartPoint="959.917,-1102.122" EndPoint="959.917,-988.308">
                                <LinearGradientBrush.GradientStops>
                                    <GradientStop Offset="0.00" Color="#ff5090cd"/>
                                    <GradientStop Offset="0.87" Color="#ff5090cd"/>
                                    <GradientStop Offset="1.00" Color="#ff5090cd"/>
                                </LinearGradientBrush.GradientStops>
                                <LinearGradientBrush.Transform>
                                    <MatrixTransform Matrix="1.000,0.000,-0.000,-1.000,0.084,0.631" />
                                </LinearGradientBrush.Transform>
                            </LinearGradientBrush>
                        </Path.Fill>
                    </Path>
                    <Canvas>
                        <Path Fill="#ff0067b1" Data="F1 M 51.500,1042.869 C 51.500,1038.111 50.352,1034.229 48.053,1031.217 C 45.751,1028.203 42.730,1026.695 38.986,1026.695 C 35.227,1026.695 32.205,1028.203 29.921,1031.217 C 27.640,1034.229 26.498,1038.111 26.498,1042.869 C 26.498,1047.592 27.631,1051.420 29.899,1054.344 C 32.166,1057.268 35.195,1058.732 38.986,1058.732 C 42.764,1058.732 45.794,1057.268 48.075,1054.344 C 50.359,1051.420 51.500,1047.592 51.500,1042.869 Z M 56.825,1042.869 C 56.825,1047.979 55.179,1052.160 51.887,1055.408 C 48.595,1058.654 44.296,1060.277 38.986,1060.277 C 33.678,1060.277 29.382,1058.654 26.097,1055.408 C 22.813,1052.160 21.174,1047.979 21.174,1042.869 C 21.174,1037.744 22.824,1033.510 26.135,1030.166 C 29.441,1026.818 33.727,1025.148 38.986,1025.148 C 44.263,1025.148 48.556,1026.818 51.863,1030.166 C 55.172,1033.510 56.825,1037.744 56.825,1042.869 Z"/>
                        <Canvas>
                            <Path StrokeThickness="0.5" Stroke="#ff0067b1" StrokeMiterLimit="1.0" Data="F1 M 21.224,1018.291 L 290.490,1018.291"/>
                            <Path Data="F1 M 135.245,1003.188 L 135.060,1009.395 L 137.035,1009.199 L 135.245,1003.188 Z M 130.846,1012.207 L 124.915,1008.137 L 129.871,1013.525 L 130.846,1012.207 Z M 137.423,1010.262 C 133.455,1010.262 130.202,1013.304 129.860,1017.178 L 144.985,1017.178 C 144.644,1013.304 141.391,1010.262 137.423,1010.262 Z M 133.857,1009.986 L 127.557,1002.258 L 132.096,1011.004 L 133.857,1009.986 Z M 145.892,1016.332 L 151.180,1014.025 L 145.482,1014.719 L 145.892,1016.332 Z M 142.287,999.391 L 138.402,1009.178 L 140.571,1009.801 L 142.287,999.391 Z M 128.842,1016.477 L 129.334,1014.762 L 118.275,1012.311 L 128.842,1016.477 Z M 143.382,1011.316 L 146.301,1004.479 L 141.899,1010.357 L 143.382,1011.316 Z M 144.091,1012.125 L 145.122,1013.596 L 151.921,1005.924 L 144.091,1012.125 Z">
                                <Path.Fill>
                                    <RadialGradientBrush MappingMode="Absolute" GradientOrigin="706.543,618.713" Center="706.543,618.713" RadiusX="5.469" RadiusY="5.469">
                                        <RadialGradientBrush.GradientStops>
                                            <GradientStop Offset="0.00" Color="#ffffffff"/>
                                            <GradientStop Offset="0.43" Color="#ffcccccc"/>
                                            <GradientStop Offset="1.00" Color="#ff999999"/>
                                        </RadialGradientBrush.GradientStops>
                                        <RadialGradientBrush.Transform>
                                            <MatrixTransform Matrix="1.238,0.000,0.000,1.237,-737.613,251.618" />
                                        </RadialGradientBrush.Transform>
                                    </RadialGradientBrush>
                                </Path.Fill>
                            </Path>
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                            <Canvas>
                                <Path Opacity="0.5" Fill="#ff4b4d4d" Data="F1 M 199.003,1053.682 L 199.088,1053.682 L 208.492,1026.553 L 210.516,1026.553 L 198.961,1059.369 L 187.532,1026.553 L 189.557,1026.553 L 199.003,1053.682 Z"/>
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                            </Canvas>
                        </Canvas>
                    </Canvas>
                </Canvas>
            </Canvas>
        </Viewbox>
    </VisualBrush.Visual>
</VisualBrush>
</ResourceDictionary>

您将看到VisualBrush具有键名，但在mainwindow.background中我需要绑定到visualbrush的visual属性 .

{“无法将'System.Windows.Media.VisualBrush'类型的对象强制转换为'System.Windows.Media.Visual' . ”}