Question

我目前正在构建一个将操作系统信息提取到GUI中的PowerShell程序。我目前遇到的问题是我认为无效的xaml代码 -

[void] [System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[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"
    Title="OS Details" Height="384.399" Width="525">
<Grid Margin="0,0,0,-12">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="281*"/>
        <ColumnDefinition Width="236*"/>
    </Grid.ColumnDefinitions>
    <TextBox Name="textBox" Height="37" Margin="0,1,0,0" TextWrapping="Wrap"    Text=" &#x9;               Operating System Details" VerticalAlignment="Top" FontSize="18" Background="#FF9BABF1" HorizontalAlignment="Left" Width="517" Grid.ColumnSpan="2"/>
    <Label Name="HostName" Content="HostName" HorizontalAlignment="Left" Height="35" Margin="0,43,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="OSName" Content="OS Name" HorizontalAlignment="Left" Height="35" Margin="0,83,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="AvailableMemory" Content="Available Memory" HorizontalAlignment="Left" Height="35" Margin="0,123,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="OSArchitecture" Content="OS Architecture" HorizontalAlignment="Left" Height="35" Margin="0,163,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="WindowsDirectory" Content="Windows Directory" HorizontalAlignment="Left" Height="35" Margin="0,203,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="WindowsVersion" Content="Windows Version" HorizontalAlignment="Left" Height="33" Margin="0,243,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <Label Name="SystemDrive" Content="System Drive" HorizontalAlignment="Left" Height="32" Margin="0,281,0,0" VerticalAlignment="Top" Width="246" Background="#FF9BABF1"/>
    <TextBox Name="txtHostname" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,43,0,0" TextWrapping="Wrap" Text="&#xD;&#xA;" VerticalAlignment="Top" Width="254" TextChanged="textBox1_TextChanged"/>
    <TextBox Name="txtOSName" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,83,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <TextBox Name="txtAvailMem" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,123,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <TextBox Name="txtOSArch" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,163,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <TextBox Name="txtWinDir" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,203,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <TextBox Name="txtWinVer" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,241,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <TextBox Name="txtSysDrv" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="32" Margin="253,281,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="254"/>
    <Button Name="button" Grid.ColumnSpan="2" Content="Exit" HorizontalAlignment="Left" Height="27" Margin="10,318,0,0" VerticalAlignment="Top" Width="490"/>

</Grid>
</Window>

'@

#Read XAML
$reader=(New-Object System.Xml.XmlNodeReader $xaml) 
try{$Form=[Windows.Markup.XamlReader]::Load( $reader )}
catch{Write-Host "Unable to load Windows.Markup.XamlReader. Some possible     causes for this problem include: .NET Framework is missing PowerShell must be launched with PowerShell -sta, invalid XAML code was encountered."; exit}

当我运行这个时，我得到了“catch”语句（代码是由另一个用户在另一个有用的网站上编写的 - https://blogs.technet.microsoft.com/platformspfe/2014/01/20/integrating-xaml-into-powershell/#comment-3105）

关于我哪里出错的任何想法？

提前致谢！

Answer 1

当我尝试在实际的WPF项目中使用此xaml代码时，我在构建时遇到以下错误：

错误＆＃39;窗口＆＃39; root元素需要x：Class属性才能支持 XAML文件中的事件处理程序。删除事件处理程序 TextChanged事件，或者向根元素添加x：Class属性。 20号线位置190

这是问题：

<TextBox Name="txtHostname" Grid.ColumnSpan="2" HorizontalAlignment="Left" Height="35" Margin="253,43,0,0" TextWrapping="Wrap" Text="&#xD;&#xA;" VerticalAlignment="Top" Width="254" TextChanged="textBox1_TextChanged"/>

如果你不需要那个TextChanged事件，请尝试删除它，看看是否能解决问题。

Answer 2

TextChanged="textBox1_TextChanged"是问题，没有textBox1，因此事件无法生成。您应该能够安全地删除它，一旦将控件加载到脚本中，您就可以在代码中定义$txtHostName.Add_TextChanged。

Answer 3

正如Asnivor所说，你不能像你那样在你的xaml中使用一个事件。

一种选择是取出TextChanged =＆＃34; textBox1_TextChanged＆＃34;从xaml中将事件添加到后面的代码中。

$txtHostname.add_textchanged({

    Your code here

})

Powershell中的XAML WPF GUI

3 个答案: