1

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。我想知道它是否正确编写以及如何获得来自 powershell 的输出。当我从 PowerShell 窗口运行时它工作正常

密码命令：

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;
        }
4

1 回答 1

2

与您上一个问题的答案类似，在更正您的代码中的以下问题后，以下自包含示例代码演示了该方法原则上有效：

  • 和.AddStatement()调用之间缺少一个调用；这对于（基于脚本块的）调用和被视为单独语句的调用是必要的。.AddScript().AddCommand()Import-ModuleGet-RowAndPartitionKeys

  • 伪代码行string scriptContents = "Import-Module 'C:\Users\...\Powershell.dll";缺少关闭'（可能只是在此处发布的工件）。

  • 此外，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7.1.2的版本，.Microsoft.PowerShell.SDK

在运行创建和运行测试项目的代码后，您可以自己检查和试验它们 （./module是定义Get-RowAndPartitionKeyscmdlet的模块 DLL./app的项目，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：

结果

如你看到的：

  • 详细输出确认 cmdlet 已正确导入
  • Hi显示该 cmdlet 已成功调用。
于 2021-02-22T19:25:24.910 回答