如何从C#中读取PowerShell脚本stdout和stderr [英] How to read PowerShell script stdout and stderr from C#

问题描述

我正在实现自定义PowerShell主机，我需要阅读PowerShell脚本的stdout和stderr.问题是，当我将通过调用管道返回的对象转换为字符串时，我没有得到stdout.但是，当我将"out-string" cmdlet添加到管道中时，它的工作原理非常好.有什么方法可以在不使用"out-string"的情况下获取stdout和stderror?

I'm implementing a custom PowerShell host and I need to read stdout and stderr of the PowerShell script. Problem is that I do not get stdout when I convert object returned by invoking pipeline to string. However, when I add "out-string" cmdlet to the pipeline it works perfectly fine. Is there any way to fetch stdout and stderror without using "out-string"?

this.currentPowerShell.AddScript(cmd);
Collection<PSObject> results = this.currentPowerShell.Invoke();
foreach (PSObject obj in results)
{
      Console.WriteLine(obj.ToString());
}

当我使用上面的代码时，我只会得到部分标准输出.

When I use the code above I only get partial stdout.

推荐答案

PowerShell的 stdout 输出到另一个exe是通过获取对象并投影它们的字符串视图来合成的.PowerShell的本机输出是对象流.如果要使用这些对象的字符串版本，请使用 Out-String .但是，从C#角度来看，直接处理PowerShell输出的对象通常更有用.

PowerShell's stdout output to another exe is synthesized by taking objects and projecting a string view of them. PowerShell's native output is a stream of objects. If you want to a string version of those objects then use Out-String. However, from a C# perspective it is often more useful to deal directly with the objects that PowerShell outputs.

对于 stderr ，您可以从 PowerShell.Streams.Error 属性读取ErrorRecords.如果您还希望这些字符串是人类可读的字符串，请在输出到用户之前，通过Out-String运行它们.

For stderr, you can read ErrorRecords from the PowerShell.Streams.Error property. If you want a human readable string for those as well, run them thru Out-String before outputting to your user.

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