将powershell cmdlet输出写入文件,而不是从c写入管道#

您可以在C#代码中创建“Powershell”(使用System.Management.Automation.Powershell)。您的“Powershell”(错误的类名选择IMO,我将其称为SMA。为了清楚起见,在这个答案中Powershell)可以调用 tee-object (或 append-content 或 set-content ). 然后,可以将类实例作为参数传递给SMA.Powershell。

或者,您可以只使用系统下的类。IO文件空间并直接写入文件。您可以通过write对象单独写入相同的输出。

顺便说一句,除非在类中支持序列化和反序列化,否则将输出写入文件是没有意义的。除非,您真正想要的是将类实例编写为文本表。在这种情况下,您的SMA。Powershell可以是这样的 % { $_ | ft | set-content c:\data.txt; $_} .

Tee Object为我做了这项工作。

PowerShell powerShellInstance = PowerShell.Create();
powerShellInstance.AddCommand("Tee-Object");
powerShellInstance.AddParameter("FilePath", filePath);
powerShellInstance.AddParameter("InputObject", obj_A);
powerShellInstance.AddParameter("Append");
powerShellInstance.Invoke();

但是,当上面的代码被多次调用时,该文件被写为

Title_p   Title_q  Title_r  Title_s
=======   =======  =======  =======
Hello      Bolo     12     {RR,TT,YY}

Title_p   Title_q  Title_r  Title_s
=======   =======  =======  =======
Aaaao      Colo     13     {EE,YY}

Title_p   Title_q  Title_r  Title_s
=======   =======  =======  =======
HHSAR      Dolo     14     {QQ,XX}

但在cmdlet实现中,即使您调用了它。WriteObject()多次使用多个对象,结果如下

Title_p   Title_q  Title_r  Title_s
=======   =======  =======  =======
Hello      Bolo     12     {RR,TT,YY}
Aaaao      Colo     13     {EE,YY}
HHSAR      Dolo     14     {QQ,XX}

我正在尝试调整代码,以便即使在程序中多次调用invoke()命令,输出文件仍然只有一个列标题,而不是每个对象的一个列头(在最终输出文件中)

终于完成了,我想要:

// When this method is called for the first time, it creates a table header too.
// The following is the PowerShell line that will be run in the runspace.
// Write-Output -InputObject <object_A> | Format-Table | Out-String

// For the next time, when this routine is called, the following gets executed.
// Write-Output -InputObject <object_A> | Format-Table -HideTableHeaders | Out-String

Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();
Pipeline pipeLine = runspace.CreatePipeline();

Command command1 = new Command("Write-Output");
command1.Parameters.Add("InputObject", object_A);

Command command2 = new Command("Format-Table");
if (this.filePath != null)
{
    // If this is not the first row, hide the table headers
    command2.Parameters.Add("HideTableHeaders");
}
Command command3 = new Command("Out-String");

pipeLine.Commands.Add(command1);
pipeLine.Commands.Add(command2);
pipeLine.Commands.Add(command3);
var results = pipeLine.Invoke();

// The resultant text from the command will have a lot of white spaces/carriage returns.
// So, let us trim the content before adding it to file.
foreach (var result in results)
{
    string data = null;
    data = string.Concat(result);
    data = data.Trim();

    // For the first time, we need to create a log file too.
    if (filePath == null)
    {
        // Call custom routine CreateLogFile() which creates a file and returns the file path as string for you
        filePath = CreateLogFile();
    }

    // Write the object row into the file.
    using (StreamWriter writer = System.IO.File.AppendText(this.filePath))
    {
        writer.WriteLine(data);
    }
}

runspace.Close();