c# - 如何从 C# 中的 PowerShell 命令获取 Invoke-Command 详细或调试输出

Question

我有一个 PowerShell 命令，它调用远程机器上的命令打印出调试信息，然后在运行的机器上打印出调试信息，如下所示:

function Start-DebugTest {
    [cmdletbinding()]
    param ()

    $cmd = {
        $DebugPreference = 'Continue'
        Write-Debug -Message 'This is invoked DEBUG message'
    }

    $params = @{
        ComputerName = $ip
        Credential = $cred
        ScriptBlock = $cmd
    }

    Invoke-Command @params

    Write-Debug -Message 'This is a normal DEBUG message'
}

当我在本地运行 Start-DebugTest 命令时，我看到以下输出:

DEBUG: This is invoked DEBUG message
DEBUG: This is a normal DEBUG message

当我像这样通过 C# 运行它时:

using (PowerShell powershell = PowerShell.Create())
{
    var command = powershell.AddCommand("Start-DebugTest");
    powershell.Runspace.SessionStateProxy.SetVariable("DebugPreference", "Continue");

    PSDataCollection<PSObject> output = new PSDataCollection<PSObject>();
            output.DataAdded += (sender, args) => DataAdded((PSDataCollection<PSObject>) sender, progress);
    powershell.Streams.Debug.DataAdded += (sender, args) => StreamDataAdded((PSDataCollection<DebugRecord>) sender, args, "DEBUG", progress);

    var resources = await Task.Factory.FromAsync(
         powershell.BeginInvoke<PSObject, PSObject>(null, output),
         asyncResult => powershell.EndInvoke(asyncResult));

    return resources;
}

private void StreamDataAdded<T>(PSDataCollection<T> records, DataAddedEventArgs e, string msgType, IProgress<string> progress) where T : InformationalRecord
{
    string msg = records[e.Index].Message;
    progress.Report($"{msgType}: {msg}");
}

private void DataAdded(PSDataCollection<PSObject> myp, IProgress<string> progress)
{
    Collection<PSObject> results = myp.ReadAll();
    foreach (PSObject result in results)
    {
        progress.Report($"OUTPUT: {result.ToString()}");
    }
}

我只收到在本地机器上运行的调试消息，而不是来自调用命令的调试消息，来自 DataAdded 事件之一:

DEBUG: This is a normal DEBUG message

如果我在本地运行时看到输出，则说明调试消息可用。有什么方法可以从 C# 访问它吗？

Answer 1

我认为您可能必须在 Invoke-Command 调用中指定您的调试首选项...

about_Preference_Variables

The preference variables affect the PowerShell operating environment and all commands run in the environment.

这里的重点是“在环境中”

在其他环境中运行的命令与调用命令不共享相同的首选项设置。

about_CommonParameters

-调试[:{$true | $false}]

Displays programmer-level detail about the operation performed by the command. This parameter works only when the command generates a debugging message. For example, this parameter works when a command contains the Write-Debug cmdlet.

解决方案

$params = @{
    ComputerName = $ip
    Credential = $cred
    ScriptBlock = $cmd
    Debug = $true
}

Invoke-Command @params