private static async Task <string[]> ExecuteDirectAsync(string arguments, CancellationToken cancellationToken)
{
using var canceller = new RedirectionCanceller();
using var proc = new Process
{
StartInfo =
{
FileName = Path.Combine(Environment.SystemDirectory, "pnputil.exe"),
Arguments = arguments,
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardInput = false,
RedirectStandardOutput = true
},
EnableRaisingEvents = true
};
var outputLines = new List <string>();
var tcs = new TaskCompletionSource <bool>();
void received(object sender, DataReceivedEventArgs e) => outputLines.Add(e.Data);
void exited(object sender, EventArgs e) => tcs.SetResult(true);
using var registration = cancellationToken.Register(() => tcs.TrySetCanceled());
try
{
proc.OutputDataReceived += received;
proc.Exited += exited;
proc.Start();
proc.BeginOutputReadLine();
await tcs.Task;
return(outputLines.ToArray());
}
finally
{
proc.OutputDataReceived -= received;
proc.Exited -= exited;
}
}
private static async Task <string[]> ExecuteCommandLineAsync(string arguments, CancellationToken cancellationToken)
{
using var canceller = new RedirectionCanceller();
using var proc = new Process
{
StartInfo =
{
FileName = Environment.GetEnvironmentVariable("ComSpec"),
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardInput = true,
RedirectStandardOutput = true
},
EnableRaisingEvents = true
};
string[] inputLines =
{
"chcp 437", // Change code page to 437 (US English).
$"pnputil {arguments}",
"exit"
};
var outputLines = new List <string>();
var tcs = new TaskCompletionSource <bool>();
void received(object sender, DataReceivedEventArgs e) => outputLines.Add(e.Data);
void exited(object sender, EventArgs e) => tcs.SetResult(true);
using var registration = cancellationToken.Register(() => tcs.TrySetCanceled());
try
{
proc.OutputDataReceived += received;
proc.Exited += exited;
proc.Start();
proc.BeginOutputReadLine();
using (var writer = proc.StandardInput)
{
if (writer.BaseStream.CanWrite)
{
foreach (var inputLine in inputLines)
{
writer.WriteLine(inputLine);
}
}
}
await tcs.Task;
return(outputLines.ToArray());
}
finally
{
proc.OutputDataReceived -= received;
proc.Exited -= exited;
}
}
