PowerShell XAML GUI：点击按钮获取文本框值并传递至数据传输

原代码存在的核心问题 #

• 输入文本框未设置x:Name属性，导致无法读取用户实际输入（原代码错误地读取了提示Label的文本）
• 变量作用域限制：Submit按钮事件内定义的变量是局部变量，Transfer按钮无法访问
• 提前执行的环境变量设置代码无效，执行时变量尚未被赋值
• Robocopy路径中的反斜杠未正确处理，会导致路径解析错误

修正后的完整代码 #

Add-Type -AssemblyName PresentationFramework

# 构建GUI窗口的XAML代码
[xml]$xaml = @"
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Name="Window" Title="Profile Transfer" WindowStartupLocation = "CenterScreen"
        Width = "460" Height = "220" ShowInTaskbar = "True">
    <Grid Margin="0,0,0,0" Background="#FF3D0198">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="17*"/>
            <ColumnDefinition Width="443*"/>
        </Grid.ColumnDefinitions>
        <Button x:Name="subbttn" Content="Submit Entries" HorizontalAlignment="Left" Margin="290,84,0,0" VerticalAlignment="Top" Width="120" FontFamily="Times New Roman" Grid.Column="1" Height="18"/>
        <Button x:Name="transbttn" Content="TRANSFER Data" HorizontalAlignment="Left" Margin="145,124,0,0" VerticalAlignment="Top" Width="120" FontFamily="Times New Roman" Grid.Column="1" Height="18"/>
        <!-- 为文本框添加x:Name，用于读取用户输入 -->
        <TextBox x:Name="fromCompTextBox" HorizontalAlignment="Left" Margin="290,15,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120" FontFamily="Times New Roman" Grid.Column="1" Height="16"/>
        <TextBox x:Name="toCompTextBox" HorizontalAlignment="Left" Margin="290,38,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120" FontFamily="Times New Roman" Grid.Column="1" Height="16"/>
        <TextBox x:Name="userIdTextBox" HorizontalAlignment="Left" Margin="290,61,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120" FontFamily="Times New Roman" Grid.Column="1" Height="16"/>
        <Label x:Name="fromlbl" Content="What is the name of the Old PC?" HorizontalAlignment="Left" Margin="1,11,0,0" VerticalAlignment="Top" Width="202" Foreground="White" FontFamily="Times New Roman" Grid.Column="1" Height="24"/>
        <Label x:Name="tolbl" Content="What is the name of the New PC?" HorizontalAlignment="Left" Margin="1,34,0,0" VerticalAlignment="Top" Foreground="White" FontFamily="Times New Roman" Grid.Column="1" Height="24" Width="173"/>
        <Label x:Name="uidlbl" Content="What is the USER's ID?" HorizontalAlignment="Left" Margin="1,57,0,0" VerticalAlignment="Top" Foreground="White" FontFamily="Times New Roman" Grid.Column="1" Height="24" Width="126"/>
        <StatusBar Grid.Column="1" Margin="0,147,33,10"/>
    </Grid>
</Window>
"@

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

# 获取XAML中的控件对象
$subbttn = $window.FindName("subbttn")
$transbttn = $window.FindName("transbttn")
$fromCompTextBox = $window.FindName("fromCompTextBox")
$toCompTextBox = $window.FindName("toCompTextBox")
$userIdTextBox = $window.FindName("userIdTextBox")

# 定义全局变量，用于跨按钮事件传递数据
$global:fromcompname = ""
$global:tocompname = ""
$global:userid = ""

# Submit按钮点击事件：读取输入并赋值给全局变量
$subbttn.Add_Click({
    # 读取文本框内容
    $global:fromcompname = $fromCompTextBox.Text.Trim()
    $global:tocompname = $toCompTextBox.Text.Trim()
    $global:userid = $userIdTextBox.Text.Trim()

    # 可选：验证输入是否为空
    if ([string]::IsNullOrEmpty($global:fromcompname) -or [string]::IsNullOrEmpty($global:tocompname) -or [string]::IsNullOrEmpty($global:userid)) {
        [System.Windows.MessageBox]::Show("请填写所有必填字段", "输入错误", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Error)
        return
    }

    Write-Host "已获取输入：旧PC=$global:fromcompname，新PC=$global:tocompname，用户ID=$global:userid"
})

# Transfer按钮点击事件：执行Robocopy逻辑
$transbttn.Add_Click({
    # 先验证变量是否已赋值
    if ([string]::IsNullOrEmpty($global:fromcompname) -or [string]::IsNullOrEmpty($global:tocompname) -or [string]::IsNullOrEmpty($global:userid)) {
        [System.Windows.MessageBox]::Show("请先点击「Submit Entries」提交输入信息", "操作提示", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Information)
        return
    }

    # 构建Robocopy路径（注意双反斜杠）
    $sourcePath = "\\$global:fromcompname\c$\Users\$global:userid"
    $destPath = "\\$global:tocompname\c$\Users\$global:userid"

    # 执行Robocopy命令
    C:\windows\system32\Robocopy.exe $sourcePath $destPath `
        "/XJ" "/MIR" "/PURGE" `
        "/R:2" "/W:5" "/XA:SH" "/S" "/256" "/XF" "*.MP3" "desktop.ini" `
        "/XD" "AppData" "Contacts" "Downloads" "Links" "Music" "SapWorkDir" "Searches" "Tracing" "Remote Assistance Logs" "Saved Games"

    # 可选：提示复制完成
    if ($LASTEXITCODE -le 7) {
        [System.Windows.MessageBox]::Show("数据传输完成", "操作完成", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Information)
    } else {
        [System.Windows.MessageBox]::Show("数据传输过程中出现错误，错误代码：$LASTEXITCODE", "传输错误", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Error)
    }
})

$window.ShowDialog()

关键修改说明 #

1. 文本框命名：给三个输入文本框添加x:Name属性，确保能正确读取用户输入
2. 全局变量：使用$global:前缀定义变量，让Submit按钮的赋值能被Transfer按钮访问
3. 输入验证：添加空值检查，避免执行无效的Robocopy命令
4. 路径修正：将Robocopy路径中的单反斜杠改为双反斜杠，确保网络路径解析正确
5. 状态提示：添加MessageBox提示用户操作状态，提升交互体验

内容的提问来源于stack exchange，提问作者SammyD007