If the script finished I want a messagebox popup, but I don't know the if statement.
using (PowerShell PowerShellInstance = PowerShell.Create())
{
PowerShellInstance.AddScript("cmdkey /list | ForEach-Object{if($_ -like \"*Target:*\"){cmdkey /del:($_ -replace \" \",\"\" -replace \"Target:\",\"\")}}");
PowerShellInstance.Invoke();
if ()
{
MessageBox.Show("the process was successfully completed");
}
As pointed out by ADyson, calling PowerShellInstance.Invoke(); is synchronous.
However, if you want to know if the command was successful or not, you can use HadErrors and read the error stream when needed:
if (!PowerShellInstance.HadErrors)
{
MessageBox.Show("the process was successfully completed");
}
else
{
string[] errors = PowerShellInstance.Streams.Error.Select(x => x.ToString()).ToArray();
// Show error to user or log them...
}
PowerShellInstance.Invoke(); is synchronous, so your script will already wait for Powershell to complete. You don't need an if statement.
If you really want asynchronous execution you can invoke the script another way using BeginInvoke(). See https://learn.microsoft.com/en-gb/archive/blogs/kebab/executing-powershell-scripts-from-c - it explains both the synchronous and asynchronous approaches.
Invoke, you'll see that it will "Invoke the Command synchronously and return the output PSObject collection". So there's nothing to check (except perhaps catch one or more of the 12 documented exceptions that might be thrown on failure).