如何从Powershell重定向输出

Question

我有一个类似但不同的问题，如How to redirect Powershell output from a script run by TaskScheduler and override default width of 80 characters。

我有一个很早以前写的自定义安装程序框架。在它内部，我可以执行“任务”。我最近不得不添加一个任务来执行PowerShell脚本。现在，即使任务是用C＃编写的，我也无法直接在PowerShell脚本中调用这些命令。不幸的是，这不在场。

简而言之，我想从C＃调用PowerShell可执行文件并将其输出重定向回我的应用程序。这是我到目前为止已经完成：

我可以使用下面的代码（由我创建了一个测试项目）成功地调用的PowerShell：

string powerShellExeLocation = null; 

    RegistryKey localKey = Registry.LocalMachine; 

    RegistryKey subKey = localKey.OpenSubKey(@"SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine"); 
    powerShellExeLocation = subKey.GetValue("ApplicationBase").ToString(); 

    if (!Directory.Exists(powerShellExeLocation)) 
    throw new Exception("Cannot locate the PowerShell dir."); 

    powerShellExeLocation = Path.Combine(powerShellExeLocation, "powershell.exe"); 

    if (!File.Exists(powerShellExeLocation)) 
    throw new Exception("Cannot locate the PowerShell executable."); 

    string scriptLocation = Path.Combine(Environment.CurrentDirectory, "PowerShellScript.ps1"); 

    if (!File.Exists(scriptLocation)) 
    throw new Exception("Cannot locate the PowerShell script."); 

    ProcessStartInfo processInfo = new ProcessStartInfo(); 
    processInfo.Verb = "runas"; 
    processInfo.UseShellExecute = false; 
    processInfo.RedirectStandardOutput = true; 
    processInfo.RedirectStandardOutput = true; 
    processInfo.WorkingDirectory = Environment.CurrentDirectory; 

    processInfo.FileName = powerShellExeLocation; 
    processInfo.Arguments = "-NoLogo -OutputFormat Text -NonInteractive -WindowStyle Hidden -ExecutionPolicy Unrestricted -File \"" + scriptLocation + "\" "; 

    Process powerShellProcess = new Process(); 
    powerShellProcess.StartInfo = processInfo; 
    powerShellProcess.OutputDataReceived += new DataReceivedEventHandler(powerShellProcess_OutputDataReceived); 
    powerShellProcess.ErrorDataReceived += new DataReceivedEventHandler(powerShellProcess_ErrorDataReceived); 

    powerShellProcess.Start(); 

    while (!powerShellProcess.HasExited) 
    { 
    Thread.Sleep(500); 
    } 

我的处理程序重定向输出从来不被称为：

void powerShellProcess_ErrorDataReceived(object sender, DataReceivedEventArgs e) 

和

void powerShellProcess_OutputDataReceived(object sender, DataReceivedEventArgs e) 

我相当确信脚本运行宁。现在我只有一个输出PATH内容的测试脚本。

$a = $env:path; $a.Split(";") 

我在PowerShell实例中测试了它并正确输出。

我能做些什么来获得PowerShell输出重定向到我的C＃代码？我不想依靠我将执行的脚本来处理他们自己的日志记录。我宁愿收集他们的输出，并在框架的日志记录机制中处理它。

编辑 实现我留下了奇怪的循环等待退出该代码示例。我有过的过程 “WaitForExit”：

powerShellProcess.WaitForExit(); 

编辑
使用从@MiniBill的建议。我想出了以下代码snippit：

powerShellProcess.Start(); 
while (!powerShellProcess.HasExited) 
{ 
    string line; 
    while (!string.IsNullOrEmpty((line = powerShellProcess.StandardOutput.ReadLine()))) 
    this.LogInfo("PowerShell running: " + line); 
} 

这将处理输出正常。它切断了我的台词，在80个字符:(，但我可以忍受的，除非有人能提供建议，以解决这个问题！

UPDATE 一个解决方案

/* 
    * The next few lines define the process start info for the PowerShell executable. 
    */ 
ProcessStartInfo processInfo = new ProcessStartInfo(); 
processInfo.Verb = "runas"; 
processInfo.UseShellExecute = false; 
processInfo.RedirectStandardError = true; 
processInfo.RedirectStandardOutput = true; 
processInfo.WorkingDirectory = Environment.CurrentDirectory; 

//this FileName was retrieved earlier by looking in the registry for key "HKLM\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine" and the value for "ApplicationBase" 
processInfo.FileName = powerShellExeLocation; 

//if we're going to use script arguments build up the arguments from the process start correctly. 
if (!string.IsNullOrEmpty(this.ScriptArguments)) 
    processInfo.Arguments = "-NoLogo -NonInteractive -WindowStyle Hidden -ExecutionPolicy Unrestricted -File \"" + ScriptLocation + "\" '" + ScriptArguments + "'"; 
else 
    processInfo.Arguments = "-NoLogo -NonInteractive -WindowStyle Hidden -ExecutionPolicy Unrestricted -File \"" + ScriptLocation + "\""; 

//create the Process object, set the start info, and start the process 
Process powerShellProcess = new Process(); 
powerShellProcess.StartInfo = processInfo; 

powerShellProcess.Start(); 

/* 
    * While the PowerShell process hasn't exited do the following: 
    * 
    * Read from the current position of the StandardOutput to the end by each line and 
    * update the tasks progress with this information 
    * 
    * Read from the current position of StandardError to the end by each line, update 
    * the task's progress with this information and set that we have an error. 
    * 
    * Sleep for 250 milliseconds (1/4 of a sec) 
    */ 
bool isError = false; 
while (!powerShellProcess.HasExited) 
{ 
    string standardOuputLine, standardErrorLine; 
    while (!string.IsNullOrEmpty((standardOuputLine = powerShellProcess.StandardOutput.ReadLine()))) 
    { 
    this.UpdateTaskProgress(standardOuputLine); 
    } 


    while (!string.IsNullOrEmpty((standardErrorLine = powerShellProcess.StandardError.ReadLine()))) 
    { 
    this.UpdateTaskProgress(standardErrorLine); 
    isError = true; 
    } 

    Thread.Sleep(250); 
} 

/* 
    * Now that the process has completed read to the end of StandardOutput and StandardError. 
    * Update the task progress with this information. 
    */ 

string finalStdOuputLine = powerShellProcess.StandardOutput.ReadToEnd(); 
string finalStdErrorLine = powerShellProcess.StandardError.ReadToEnd(); 

if (!string.IsNullOrEmpty(finalStdOuputLine)) 
    this.UpdateTaskProgress(finalStdOuputLine); 

if (!string.IsNullOrEmpty(finalStdErrorLine)) 
{ 
    this.UpdateTaskProgress(finalStdErrorLine); 
    isError = true; 
} 

// there was an error during the run of PowerShell that was output to StandardError. This doesn't necessarily mean that 
// the script error'd but there was a problem. Throw an exception for this. 
if (isError) 
    throw new Exception(string.Format(CultureInfo.InvariantCulture, "Error during the execution of {0}.", this.ScriptLocation)); 

Answer 1

你想使用Process.StandardOutput属性这是一个可以打开以获得程序输出的流