在 C# 中获取此 Powershell 输出的正确方法是什么

Question

我在下面没有收到任何错误，但我也没有得到输出。下面是 Powershell cmd 和调用它的 C# 方法。我想知道它是否编写正确以及如何获得来自 powershell 的输出。当我从 PowerShell 窗口运行时它工作正常

Pwsh 命令：

public class GetRowAndPartitionKeys : Cmdlet
    {
        [Parameter(Mandatory = false)]
        public List<string> Properties { get; set; } = new List<string>();
    }

    [Cmdlet( VerbsCommon.Get, "RowAndPartitionKeys" )]
    public class GetRowAndPartitionKeyCmd : GetRowAndPartitionKeys

    {
        protected override void ProcessRecord()
        {            
            WriteObject ("Hi");
        }
    }

}

C#方法：

 public async Task<IEnumerable<object>> RunScript(  )
        {
            // create a new hosted PowerShell instance using the default runspace.
            // wrap in a using statement to ensure resources are cleaned up.
           string scriptContents = "Import-Module 'C:\Users\...\Powershell.dll";
            using( PowerShell ps = PowerShell.Create() )
            {
                // specify the script code to run.
            ps.AddScript( scriptContents ).AddCommand( "Get-RowAndPartitionKeys" );


            // execute the script and await the result.
            var pipelineObjects = await ps.InvokeAsync().ConfigureAwait( false );
           
            foreach( var item in pipelineObjects )
            {
                Console.WriteLine( item.BaseObject.ToString() );
            }
            return pipelineObjects;
        }

Answer 1

与answer to your previous question 类似，以下自包含示例代码演示了该方法原则上在更正代码中的以下问题后有效： p>

• 在.AddScript() 和.AddCommand() 调用之间缺少一个.AddStatement() 调用；这对于（基于脚本块的）Import-Module 调用和 Get-RowAndPartitionKeys 调用被视为单独的语句是必要的。

• 伪代码行string scriptContents = "Import-Module 'C:\Users\...\Powershell.dll"; 缺少结束'（可能只是在此处发布的人工制品）。

• 另外，下面添加了故障排除代码。

虽然编排代码在 PowerShell 中，但使用通过 .NET SDK 编译的实际 C# 项目，并结合 PowerShell（核心）SDK 包的版本 7.1.2， Microsoft.PowerShell.SDK.

运行代码后，创建并运行测试项目，您可以自己检查和试验它们（./module 是定义 Get-RowAndPartitionKeys cmdlet 的模块 DLL 的项目， ./app 是调用它的应用程序的项目）：

$tmpDir = (New-Item -Force -Type Directory (Join-Path temp: $PID)).FullName

$tmpModuleDir = (New-Item -Force -Type Directory (Join-Path $tmpDir module)).FullName
$tmpAppDir = (New-Item -Force -Type Directory (Join-Path $tmpDir app)).FullName
$tmpPublishDir = (New-Item -Force -Type Directory (Join-Path $tmpDir publish)).FullName

$tmpModuleDll = Join-Path $tmpPublishDir module.dll

Push-Location

# ---

Write-Verbose -vb "Creating module DLL with sample cmdlet..."

Set-Location $tmpModuleDir

dotnet new classlib --force >$null || $(exit $LASTEXITCODE)

dotnet add package Microsoft.PowerShell.SDK >$null || $(exit $LASTEXITCODE)

@'
using System;
using System.Collections.Generic;
using System.Management.Automation;

namespace demo {
    public class GetRowAndPartitionKeys : Cmdlet 
    {
      public List<string> Properties { get; set; }
    }
    
    [Cmdlet( VerbsCommon.Get, "RowAndPartitionKeys" )]
    public class GetRowAndPartitionKeyCmd : GetRowAndPartitionKeys
    {
      protected override void ProcessRecord()
      {
          WriteObject ("Hi");
      }
    }
}
'@ | Set-Content Class1.cs

dotnet publish -o $tmpPublishDir >$null || $(exit $LASTEXITCODE)

# ---

Write-Verbose -vb "Creating console application that imports the module DLL and calls the sample cmdlet..."
Set-Location $tmpAppDir

dotnet new console --force >$null  || $(exit $LASTEXITCODE)

dotnet add package Microsoft.PowerShell.SDK >$null || $(exit $LASTEXITCODE)

@"
using System;
using System.Collections.Generic;
using System.Management.Automation;
using System.Threading.Tasks;

namespace demo {

    public static class App {
        static void Main(string[] args)
        {
            var unused = new Foo().RunScript().Result;
        }
    }    

    public class Foo {
        public async Task<IEnumerable<object>> RunScript()
        {
            string scriptContents = @"Import-Module -Verbose ""$tmpModuleDll""";
            using(PowerShell ps = PowerShell.Create())
            {
                ps.AddScript(scriptContents).AddStatement().AddCommand("Get-RowAndPartitionKeys");
                var pipelineObjects = await ps.InvokeAsync().ConfigureAwait( false );
                
                // --- TROUBLESHOOTING CODE

                // Print verbose output from the Import-Module call
                foreach (var v in ps.Streams.Verbose) { Console.WriteLine("VERBOSE: " + v.ToString()); }
        
                // Print any errors.
                foreach (var e in ps.Streams.Error) { Console.WriteLine("ERROR: " + e.ToString()); }
        
                // ---                

                foreach (var item in pipelineObjects)
                {
                    Console.WriteLine(item.BaseObject.ToString());
                }

                return pipelineObjects;
            }
        }
    }
}
"@ | Set-Content Program.cs

# ---

Write-Verbose -vb "Compiling and invoking the console application..."
dotnet run 

Pop-Location

Write-Verbose -vb @"
The test projects are located in $tmpDir.
To clean up, run:

   Remove-Item "$tmpdir" -Recurse
 
"@

在我的 Windows 10 机器上（从 PowerShell 7.1.2 运行），我得到：

如你所见：

• 详细输出确认 cmdlet 已正确导入
• Hi 表明 cmdlet 已成功调用。