名称空间中不存在名称“XamlDisplay”答案

【问题标题】：The name "XamlDisplay" does not exist in the namespace名称空间中不存在名称“XamlDisplay”
【发布时间】：2018-05-07 07:35:15
【问题描述】：

我正在尝试在 xaml Toolkit 中实现 Material Design 并收到此错误

The name "XamlDisplay" does not exist in the namespace "clr-namespace:ShowMeTheXAML;assembly=ShowMeTheXAML"

我刚刚从官方文档中复制并粘贴了这段代码 Xaml code
我已经尝试过Other Question on StackOverflow 这里提供的解决方案，比如将调试更改为发布模式、清理 shadowCache 和 DLL 文件权限。
但这些都只是技巧，不是可靠的答案，它们对我不起作用。出了什么问题？
我的 Xaml 代码

<Window x:Class="MaterialTestApp.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:MaterialTestApp"
    mc:Ignorable="d"
    xmlns:smtx="clr-namespace:ShowMeTheXAML;assembly=ShowMeTheXAML"
    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    TextElement.Foreground="{DynamicResource MaterialDesignBody}"
    TextElement.FontWeight="Regular"
    TextElement.FontSize="13"
    TextOptions.TextFormattingMode="Ideal" 
    TextOptions.TextRenderingMode="Auto"        
    Background="{DynamicResource MaterialDesignPaper}"
    FontFamily="{DynamicResource MaterialDesignFont}">
<Grid>
    <StackPanel Margin="8 8 0 0">
        <TextBlock>Raised controls have default shadows set, but the shadows can be overriden.</TextBlock>
        <StackPanel Orientation="Horizontal" Margin="0 32 0 0">
            <smtx:XamlDisplay Key="shadow_1">
                <Button Style="{DynamicResource MaterialDesignRaisedButton}"
                    >DEPTH 1</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_2" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignRaisedButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth2"
                    >DEPTH 2</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_3" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignRaisedButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth3"
                    >DEPTH 3</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_4" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignRaisedButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth4"
                    >DEPTH 4</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_5" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignRaisedButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth5"
                    >DEPTH 5</Button>
            </smtx:XamlDisplay>
        </StackPanel>
        <StackPanel Orientation="Horizontal" Margin="0 32 0 0">
            <smtx:XamlDisplay Key="shadow_6">
                <Button Style="{DynamicResource MaterialDesignFloatingActionMiniButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth1"
                    >1</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_7" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignFloatingActionMiniButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth2"
                    >2</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_8" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignFloatingActionMiniButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth3"
                    >3</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_9" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignFloatingActionMiniButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth4"
                    >4</Button>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_10" Margin="16 0 0 0">
                <Button Style="{DynamicResource MaterialDesignFloatingActionMiniButton}"
                    materialDesign:ShadowAssist.ShadowDepth="Depth5"
                    >5</Button>
            </smtx:XamlDisplay>
        </StackPanel>
        <StackPanel Orientation="Horizontal" Margin="0 32 0 0">
            <smtx:XamlDisplay Key="shadow_11">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth1" Padding="32">DEPTH 1</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_12" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth2" Padding="32">DEPTH 2</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_13" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth3" Padding="32">DEPTH 3</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_14" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth4" Padding="32">DEPTH 4</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_15" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth5" Padding="32">DEPTH 5</materialDesign:Card>
            </smtx:XamlDisplay>
        </StackPanel>
        <StackPanel Orientation="Horizontal" Margin="0 32 0 0">
            <smtx:XamlDisplay Key="shadow_16">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth3" materialDesign:ShadowAssist.ShadowEdges="Bottom,Right" Padding="32">CUSTOM CLIP</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_17" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth3" materialDesign:ShadowAssist.ShadowEdges="Top" Padding="32">CUSTOM CLIP</materialDesign:Card>
            </smtx:XamlDisplay>
            <smtx:XamlDisplay Key="shadow_18" Margin="16 0 0 0">
                <materialDesign:Card materialDesign:ShadowAssist.ShadowDepth="Depth3" materialDesign:ShadowAssist.ShadowEdges="Bottom,Left" Padding="32">CUSTOM CLIP</materialDesign:Card>
            </smtx:XamlDisplay>
        </StackPanel>
    </StackPanel>
</Grid>

App.Xaml

<Application x:Class="Test_App.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:local="clr-namespace:Test_App"
         StartupUri="MainWindow.xaml">
<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>

            <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Lime.xaml" />

        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

【问题讨论】：

看在上帝的份上！！它不重复..我已经尝试过其他问题中提供的解决方案。这不起作用这就是我在这里问的原因！
然后解释您的问题与重复问题的不同之处以及您已经尝试过的具体内容。 “它不起作用”不是一个充分的问题描述。发布代码的相关部分并解释它应该做什么。
已编辑！ @克莱门斯
您的应用程序项目引用了 ShowMeTheXAML 程序集，该程序集在 ShowMeTheXAML 命名空间中包含 XamlDisplay 类？
@Clemens 更新了完整代码！没有这样的存在！这就是问题所在。在官方文档中，他们提供了此代码，而我只是使用了它！现在我遇到了这个问题！

标签： c# wpf xaml material-design-in-xaml

【解决方案1】：

我是 ShowMeTheXaml 的作者。该项目的目的是为 MaterialDesignInXAML (MDIX) 中的演示应用程序提供显示 MDIX 控件和样式的相应 XAML 的功能。除非您希望在您的应用程序中使用相同的功能（不太可能），否则您可以从项目中删除 ShowMeTheXaml。至于您的 xaml，您可以简单地删除 <smtx:XamlDisplay> 标记并保留内容。

【讨论】：

【解决方案2】：

好的，所以问题是我缺少 ShowMeTheXaml 的引用，它必须使用 Nugget 包管理器手动安装，仅此而已:)

ShowMeTheXaml

【讨论】：