为什么在 PowerShell 中使用文本框“文本”时 WPK 数据绑定不起作用？财产？

发布于 2024-11-04 02:06:18 字数 715 浏览 0 评论 0原文

再会。我想问一个问题。为什么此代码中的 TextBox 控件“Txt”没有接收 $CounterObject 对象的属性值？

New-Grid -Height 150 -Width 200 -Rows 3 {
    New-Label -Name InfoLabel -Row 0 "Some message" 
    New-TextBox -Name Txt -Row 1 -DataBinding @{ Text = New-Binding -Path CounterValue -Mode OneWay}
    New-Button -Name B1 -Row 2 -Width 100 "OK"  
} -DataContext {
    Get-PowerShellDataSource -Script {
    $CounterObject = New-Object -TypeName PSObject -Property @{ CounterValue = "Some Text" }
    ForEach-Object {
        $_.CounterValue 
    }
    } 
} -on_Loaded  {
    Register-PowerShellCommand -Run -Once -ScriptBlock {
     $window.Content.DataContext.Script = $window.Content.DataContext.Script
    }
}  -asjob

原文

Good day. I'd like to ask a question.
Why TextBox control "Txt" in this code does not receive a property value of $CounterObject object?

New-Grid -Height 150 -Width 200 -Rows 3 {
    New-Label -Name InfoLabel -Row 0 "Some message" 
    New-TextBox -Name Txt -Row 1 -DataBinding @{ Text = New-Binding -Path CounterValue -Mode OneWay}
    New-Button -Name B1 -Row 2 -Width 100 "OK"  
} -DataContext {
    Get-PowerShellDataSource -Script {
    $CounterObject = New-Object -TypeName PSObject -Property @{ CounterValue = "Some Text" }
    ForEach-Object {
        $_.CounterValue 
    }
    } 
} -on_Loaded  {
    Register-PowerShellCommand -Run -Once -ScriptBlock {
     $window.Content.DataContext.Script = $window.Content.DataContext.Script
    }
}  -asjob

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薯片软お妹 2024-11-11 02:06:18

如果您单独查看 Get-PowerShellDataSource 的输出，您将看到：
1. 您的脚本不起作用（没有输出）。
2. 修复脚本时（见下文），可以在属性“Output”中找到输出（作为数组）。

因此，如果将数据绑定路径更改为“Output[0].CounterValue”，它将起作用。

您也不需要 onLoaded 事件处理程序。

这段代码有效：

New-Grid -Height 150 -Width 200 -Rows 3 {
    New-Label -Name InfoLabel -Row 0 "Some message"
    New-TextBox -Name Txt -Row 1 -DataBinding @{ Text = New-Binding -Path Output[0].CounterValue -Mode OneWay}
    New-Button -Name B1 -Row 2 -Width 100 "OK"
} -DataContext {
    Get-PowerShellDataSource -Script {
        $CounterObject = New-Object -TypeName PSObject -Property @{ CounterValue = "Some Text" }
        Return $CounterObject
    }
} -asjob

希望有帮助！

If you look at the output of Get-PowerShellDataSource separately you will see that:
1. Your script doesn't work (there is no output).
2. When you fix the script (see below), the output can be found in property "Output" (as an array).

So if you change the databinding path to "Output[0].CounterValue", it will work.

You also don't need the onLoaded event handler.

This code works:

New-Grid -Height 150 -Width 200 -Rows 3 {
    New-Label -Name InfoLabel -Row 0 "Some message"
    New-TextBox -Name Txt -Row 1 -DataBinding @{ Text = New-Binding -Path Output[0].CounterValue -Mode OneWay}
    New-Button -Name B1 -Row 2 -Width 100 "OK"
} -DataContext {
    Get-PowerShellDataSource -Script {
        $CounterObject = New-Object -TypeName PSObject -Property @{ CounterValue = "Some Text" }
        Return $CounterObject
    }
} -asjob

Hope that helps!

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