PowerShell中无法将对象集合绑定到ListBox问题求助

你的代码存在几个关键错误，导致ListBox无法正确显示数据，以下是修正点和完整代码：

错误分析 #

• 集合生成逻辑错误：原代码中ForEach-Object每次返回累加的$out数组，导致$dgSourceData变成嵌套数组结构，而非单一的对象集合。
• 绑定属性匹配错误：绑定目标是ListBox，但你用了[DataGrid]::ItemsSourceProperty，应该对应[ListBox]::ItemsSourceProperty。
• 无效的属性引用：$dgSourceData.SubObject不存在，$dgSourceData本身就是对象数组，直接转换为ObservableCollection即可。
• 控件查找变量错误：按钮查找时误用未定义的$window变量，需改用正确的窗口对象$FormMain。

修正后的完整代码 #

using namespace System.Windows
using namespace System.Windows.Data
using namespace System.Windows.Controls
using namespace System.Windows.Markup
using namespace System.Xml
using namespace System.Collections.ObjectCollection

Add-Type -AssemblyName PresentationFramework, PresentationCore, WindowsBase

# 模拟用户列表
$liste = "Marie","Michel","Jean","Adam","Paul"

# 正确生成对象集合
$dgSourceData = $Liste | ForEach-Object {
    [PSCustomObject]@{
        Name = $_
    }
}
  
[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:local="clr-namespace:SetTelephone"
        Title="MainWindow" Height="365" Width="837"
        >
    <Grid>
        <Label x:Name="LabelCompte" Content="Compte :" HorizontalAlignment="Left" Margin="122,128,0,0" VerticalAlignment="Top" Width="123" Height="31" FontSize="18" FontFamily="Arial"/>
        <Label x:Name="LabelTel" Content="Tel :" HorizontalAlignment="Left" Margin="453,128,0,0" VerticalAlignment="Top" FontFamily="Arial" FontSize="18" Width="80" Height="31"/>
        <TextBox x:Name="BoxTel" HorizontalAlignment="Left" Margin="552,128,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="139" FontFamily="Arial" FontSize="18" Height="31"/>
        <Button x:Name="BoutonMaj" Content="Maj" HorizontalAlignment="Left" Margin="376,255,0,0" VerticalAlignment="Top" Height="45" Width="100"/>
        <Button x:Name="BoutonLire" Content="Lire" HorizontalAlignment="Left" Margin="603,255,0,0" VerticalAlignment="Top" Height="43" Width="106"/>
        <ListBox x:Name="ListBox" Margin="215,127,389,162" FontFamily="Arial" FontSize="18"/> 
    </Grid>
</Window> 
"@

$FormMain = [XamlReader]::Load([XmlNodeReader] $xaml)

# 设置DataContext为包含集合的哈希表
$FormMain.DataContext = @{
    GridDataSource = [ObservableCollection[Object]]$dgSourceData
}

# 创建绑定，使用ListBox的ItemsSourceProperty
$dgBinding = [Binding]@{
    Mode = [BindingMode]::TwoWay
    Path = '[GridDataSource]'
}

$null = [BindingOperations]::SetBinding(
    $FormMain.FindName('ListBox'),
    [ListBox]::ItemsSourceProperty,
    $dgBinding
)

# 正确查找按钮控件
$Maj = $FormMain.FindName('BoutonMaj')
$Lire = $FormMain.FindName('BoutonLire')

$null = $FormMain.ShowDialog()

补充说明 #

如果需要让ListBox显示对象的Name属性文本，可以在XAML的ListBox里添加DisplayMemberPath属性：

<ListBox x:Name="ListBox" Margin="215,127,389,162" FontFamily="Arial" FontSize="18" DisplayMemberPath="Name"/>

内容的提问来源于stack exchange，提问作者MichelM