从 C# 调用 PowerShell [英] Calling PowerShell From C#

问题描述

我正在使用 System.Management.Automation DLL，它允许我在我的 C# 应用程序中调用 PowerShell，如下所示:

I am using System.Management.Automation DLL which allows me to call PowerShell within my C# application like so:

PowerShell.Create().AddScript("Get-Process").Invoke();

我想做的是调用 PowerShell 但提供输入列表.例如，在:

What I am trying to do is call PowerShell but supply the input list. For example, in:

1, 2, 3 | ForEach-Object { $_ * 2 }

我试图在调用时提供左侧 1, 2, 3 :

I am trying to supply the left hand side 1, 2, 3 when invoking:

// powershell is a PowerShell Object
powershell.Invoke(new [] { 1, 2, 3 });

然而这行不通.我想出的 解决方法是使用 ForEach-Object 然后将数组作为 InputObject 传递给 { $_ } 作为 Process:

However this does not work. The workaround I came up with was using ForEach-Object and then passing the array as an InputObject with the { $_ } as the Process:

// create powershell object
var powershell = PowerShell.Create();

// input array 1, 2, 3
Command inputCmd = new Command("ForEach-Object");
inputCmd.Parameters.Add("InputObject", new [] { 1, 2, 3 });
inputCmd.Parameters.Add("Process", ScriptBlock.Create("$_"));
powershell.Commands.AddCommand(inputCmd);

// ForEach-Object { $_ * 2 }
Command outputCmd = new Command("ForEach-Object");
outputCmd.Parameters.Add("Process", ScriptBlock.Create("$_ * 2"));
powershell.Commands.AddCommand(outputCmd);

// invoke
var result = powershell.Invoke();

虽然上面是工作代码，但有没有办法使用 Invoke 传入输入数组，因为我认为这是调用它的理想方式?

Although the above is working code is there any way of using Invoke passing in the input array because I would have though that this would be desirable way of calling it?

推荐答案

有点晚但是:

PowerShell ps = PowerShell.Create();
ps.Runspace.SessionStateProxy.SetVariable("a", new int[] { 1, 2, 3 });
ps.AddScript("$a");
ps.AddCommand("foreach-object");
ps.AddParameter("process", ScriptBlock.Create("$_ * 2"));
Collection<PSObject> results = ps.Invoke();
foreach (PSObject result in results)
{
    Console.WriteLine(result);
}

返回:

2
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6

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