Powershell 中的自定义 XAML 命名空间

Posted 2023-02-19

【中文标题】Powershell 中的自定义 XAML 命名空间

【英文标题】：Custom XAML Namespace in Powershell

【发布时间】：2018-02-02 05:43:14

【问题描述】：

我正在尝试使用 Material Design in XAML Toolkit 在 Powershell 中制作 WPF 应用程序，但我无法使用“materialDesign”自定义命名空间中的属性。我尝试了各种方法来定义命名空间，但都给出了相同的错误：

"Exception calling "Load" with "1" argument(s): "Cannot set unknown member 'http://materialdesigninxaml.net/winfx/xaml/themesHintAssist.Hint'.""

我有一个 Visual Studio 项目，我在其中通过 NuGet 安装了 Material Design Themes 包，该包使用相同的属性可以正常工作，但如果我复制 XAML 以在 Powershell 中解析，我似乎无法使其工作。

一旦我尝试使用文本框属性materialDesign:HintAssist.Hint="Name"，它就会中断。

Powershell 代码

Import-Module "$($PSScriptRoot)\MaterialDesignColors.dll"
Import-Module "$($PSScriptRoot)\MaterialDesignThemes.wpf.dll"

[xml]$xaml = @"
<Window
        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:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        Title="MainWindow" Width="1040" Height="495"

        TextElement.Foreground="DynamicResource MaterialDesignBody"
        Background="DynamicResource MaterialDesignPaper"
        TextElement.FontWeight="Medium"
        TextElement.FontSize="14"
        FontFamily="pack://application:,,,/MaterialDesignThemes.Wpf;component/Resources/Roboto/#Roboto"
        >

    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Dark.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.Amber.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.DeepPurple.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>

    <Grid>
        <TextBox x:Name="textBox" HorizontalAlignment="Left" Height="27" Margin="142,266,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120" materialDesign:HintAssist.Hint="Name"/>
    </Grid>

</Window>

"@

$reader=(New-Object System.Xml.XmlNodeReader $xaml)
$Window=[Windows.Markup.XamlReader]::Load( $reader )

$Window.ShowDialog() | Out-Null

Visual Studio 项目代码

以下是 Visual Studio 项目的代码，其中 HintAssist 属性可以正常工作：

MainWindow.xaml：

<Window x:Class="CreatePrinterWPF.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:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    mc:Ignorable="d"
    Title="MainWindow" Width="1040" Height="495"

    TextElement.Foreground="DynamicResource MaterialDesignBody"
    Background="DynamicResource MaterialDesignPaper"
    TextElement.FontWeight="Medium"
    TextElement.FontSize="14"
    FontFamily="pack://application:,,,/MaterialDesignThemes.Wpf;component/Resources/Roboto/#Roboto"
    >
<Grid>
    <TextBox x:Name="textBox" HorizontalAlignment="Left" Height="27" Margin="142,266,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120" materialDesign:HintAssist.Hint="Name"/>
</Grid>

App.xaml：

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

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

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

期望的结果是文本框有一个 faded text in it until the user enters something.

我似乎无法从 Powershell 中编译的库文件中找到任何有关使用 XAML 命名空间的资源，如果有人能帮助我，我将不胜感激。

【参考方案1】：

我设法解决了这个问题。

如果我将命名空间定义如下，只要 DLL 文件命名相同，它就可以工作：

xmlns:materialDesign="clr-namespace:MaterialDesignThemes.Wpf;assembly=MaterialDesignThemes.Wpf"