Powershell WPF XAML 通过事件折叠 RowDefinition 高度或设置为零

Question

我正在寻找的最终效果是 "disappear" 行“1”，又名：从顶部开始的第二行，以便 Text1 向下扩展到该区域，就好像第 1 行不存在一样。

这是我想要完成的模型。前 2 行和前 2 列几乎完全相同。

如果我将此 XAML 插入 VS2017 Community 并将行高设置为 0，这将起作用。在谷歌上搜索了几天后，我还没有想出解决方案。

我完全不懂 C#。

平台： Windows 7 // 豪华 v5

即将成为 Windows 10 // Posh v5

理想情况下，我想先关闭它，然后再打开它。

[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"
        Title="TabularGrid" Height="300" Width="300">
    <Grid Name="Grid">
                <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="80" />
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                        <RowDefinition Height="*" />
                        <RowDefinition Height="40" />
                        <RowDefinition Height="30" />
                        <RowDefinition Height="30" />
                </Grid.RowDefinitions>
                <TextBox Name="Text1" Background="Silver" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" >Text1</TextBox>
                <TextBox Name="Text2" Grid.Row="1" Grid.Column="0" >Text2</TextBox>
                <Button Name="Enter" Grid.Row="1" Grid.Column="1" >Enter</Button>
                <Button Name="Open" Grid.Row="2" Grid.ColumnSpan="2" >Open</Button>
                <Button Name="Close" Grid.Row="3" Grid.ColumnSpan="2" >Close</Button>
        </Grid>
</Window>
'@

$reader=(New-Object System.Xml.XmlNodeReader $xaml) 
$Form=[Windows.Markup.XamlReader]::Load( $reader )
$xaml.SelectNodes("//*[@Name]") | %{Set-Variable -Name "WPF$($_.Name)" -Value $Form.FindName($_.Name)}

#===========================================================================
# Store Form Objects In PowerShell
#===========================================================================

Function Get-FormVariables{
if ($global:ReadmeDisplay -ne $true){Write-host "If you need to reference this display again, run Get-FormVariables" -ForegroundColor Yellow;$global:ReadmeDisplay=$true}
write-host "Found the following interactable elements from our form" -ForegroundColor Cyan
get-variable WPF*
}

Get-FormVariables


#===========================================================================
# Shows the form
#===========================================================================


$WPFOpen.Add_Click({
$WPFGrid.RowDefinition[1].Visibility = $true
# or 
$WPFGrid.RowDefinition[1].Height="40"
})

$WPFClose.Add_Click({
$WPFGrid.RowDefinition[1].Visibility = $false
# or 
$WPFGrid.RowDefinition[1].Height="0"
})
#>

$Form.ShowDialog() | out-null

感谢观看

Answer 1

那是因为它不是 $WPFGrid.RowDefinition，而是 $WPFGrid.RowDefinitions，最后是 s。

我删除了 Visibility 方法，因为它没有用 RowDefinitions 实现，并通过 <RowDefinition Height="0" /> 更改了 <RowDefinition Height="40" /> 以开始 window 行不可见。

此代码有效

[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"
        Title="TabularGrid" Height="300" Width="300">
    <Grid Name="Grid">
                <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="80" />
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                        <RowDefinition Height="*" />
                        <RowDefinition Height="0" />
                        <RowDefinition Height="30" />
                        <RowDefinition Height="30" />
                </Grid.RowDefinitions>
                <TextBox Name="Text1" Background="Silver" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" >Text1</TextBox>
                <TextBox Name="Text2" Grid.Row="1" Grid.Column="0" >Text2</TextBox>
                <Button Name="Enter" Grid.Row="1" Grid.Column="1" >Enter</Button>
                <Button Name="Open" Grid.Row="2" Grid.ColumnSpan="2" >Open</Button>
                <Button Name="Close" Grid.Row="3" Grid.ColumnSpan="2" >Close</Button>
        </Grid>
</Window>
'@

$reader=(New-Object System.Xml.XmlNodeReader $xaml) 
$Form=[Windows.Markup.XamlReader]::Load( $reader )
$xaml.SelectNodes("//*[@Name]") | %{Set-Variable -Name "WPF$($_.Name)" -Value $Form.FindName($_.Name)}

#===========================================================================
# Store Form Objects In PowerShell
#===========================================================================

Function Get-FormVariables{
if ($global:ReadmeDisplay -ne $true){Write-host "If you need to reference this display again, run Get-FormVariables" -ForegroundColor Yellow;$global:ReadmeDisplay=$true}
write-host "Found the following interactable elements from our form" -ForegroundColor Cyan
get-variable WPF*
}

Get-FormVariables


#===========================================================================
# Shows the form
#===========================================================================


$WPFOpen.Add_Click({
    $WPFGrid.RowDefinitions[1].Height= 40
})

$WPFClose.Add_Click({
    $WPFGrid.RowDefinitions[1].Height= 0
})

$Form.ShowDialog() | out-null

Powershell WPF XAML 通过事件折叠 RowDefinition 高度或设置为零

Powershell WPF XAML Collapse RowDefinition Height or set to Zero with event

wpf

powershell

events

xaml

rowdefinition