Question:
I am implementing a WPF application that executes a PowerShell script for each key/value pair given in a dictionary, using the pair as script arguments. I store each run of the script as a new command in the pipeline. However, this causes me to only get output back from the last command that was run, when I need the output after each run of the script. I have considered creating a new pipeline each time the script is executed, but I need to know when all executions of the script are done. Here’s the relevant code to help explain my problem:
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private void executePowerShellScript(String scriptText, Dictionary { // Create the PowerShell object. PowerShell powerShell = PowerShell.Create(); // If arguments were given, add the script and its arguments. if (args != null) { foreach (KeyValuePair { powerShell.AddScript(scriptText); powerShell.AddArgument(arg.Key); powerShell.AddArgument(arg.Value); } } // Otherwise, just add the script. else powerShell.AddScript(scriptText); // Add the event handlers. PSDataCollection output.DataAdded += new EventHandler powerShell.InvocationStateChanged += new EventHandler // Invoke the pipeline asynchronously. IAsyncResult asyncResult = powerShell.BeginInvoke } private void Output_DataAdded(object sender, DataAddedEventArgs e) { PSDataCollection Collection foreach (PSObject result in results) { Console.WriteLine(result.ToString()); } } |
And then I use the following method to know when all executions of the script have been completed. Since I do this by checking that the invocation state of the pipeline is completed, I can’t make a new pipeline for each execution of the script:
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private void Powershell_InvocationStateChanged(object sender, PSInvocationStateChangedEventArgs e) { switch (e.InvocationStateInfo.State) { case PSInvocationState.Completed: ActiveCommand.OnCommandSucceeded(new EventArgs()); break; case PSInvocationState.Failed: OnErrorOccurred(new ErrorEventArgs((sender as PowerShell).Streams.Error.ReadAll())); break; } Console.WriteLine("PowerShell object state changed: state: {0}\n", e.InvocationStateInfo.State); } |
So, to get to my question:
1) Can I force the pipeline to produce output after each command that it executes? Or,
2) If I were to create a new pipeline each time I run the command, is there another way that I could check that all executions of the script have been completed?
There are few examples using the actual PowerShell class in C# and I know next to nothing about threading, so any help would be greatly appreciated.
Answer:
I feel silly for answering my own question, but all I did was move the loop functionality from my C# code into my script and that worked. So now I pass all the keys and values at once as array parameters and only have the one command in the pipeline.
I would still be interested to know if it is possible to produce output after each command in the pipeline is executed, though.