从C＃调用Powershell并处理异常

Question

I am calling Powershell scripts from C# using Process.Start(). How do I capture exceptions that are raised by the Powershell script in the C# code?

Answer 1

Hosting the PowerShell engine in C# is pretty simple. This code uses a bit dated API but it still works and gives you an idea of what is involved:

string cmd = @"Get-ChildItem $home\Documents -recurse | " +
              "Where {!$_.PSIsContainer -and ($_.LastWriteTime -gt (Get-Date).AddDays(-7))} | " +
              "Sort Fullname | Foreach {$_.Fullname}";

Runspace runspace = null;
Pipeline pipeline = null;

try
{
    runspace = RunspaceFactory.CreateRunspace();
    runspace.Open();
    pipeline = runspace.CreatePipeline();
    pipeline.Commands.AddScript(cmd);
    Collection<PSObject> results = pipeline.Invoke();
    foreach (PSObject obj in results)
    {
        // Consume the results
        Debug.WriteLine(obj);    
    }
}
catch (Exception ex)
{
    Debug.WriteLine(ex);
}
finally
{
    if (pipeline != null) pipeline.Dispose();
    if (runspace != null) runspace.Dispose();
}

Answer 2

Apologies, I can't work out how to comment on Keith's answer.

Do you not need to check if (pipeline.error.Count > 0) and then make use of pipeline.error.Read() ?

I've been led to believe the try/catch you have won't handle any errors that occur at the runspace level.

Answer 3

如果要与Powershell交互，则不应使用process.start，而应托管 powershell。