/// <summary>
/// Starts a process resource by specifying the name of an application and a set of command-line arguments.
/// </summary>
/// <param name="processContext">The process context of an application file to run in the process.</param>
/// <param name="processCompletedCallback">The process completed callback, invoked only when the process is started successfully and completed.</param>
/// <exception cref="ArgumentNullException">The <paramref name="processContext"/> is <c>null</c>.</exception>
/// <exception cref="Win32Exception">An error occurred when opening the associated file.</exception>
public virtual void StartProcess(ProcessContext processContext, ProcessCompletedDelegate processCompletedCallback = null)
{
var task = RunAsync(processContext);
if (processCompletedCallback != null)
{
task.ContinueWith(x => processCompletedCallback(task.Result.ExitCode));
}
}
/// <summary>
/// Starts a process and returns an awaitable task which will end once the application is closed.
/// </summary>
/// <param name="processContext">The process context of an application file to run in the process.</param>
/// <returns>The <see cref="ProcessResult"/> containing details about the execution.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="processContext"/> is <c>null</c>.</exception>
public virtual async Task <ProcessResult> RunAsync(ProcessContext processContext)
{
Argument.IsNotNull(nameof(processContext), processContext);
Argument.IsNotNullOrWhitespace(nameof(processContext.FileName), processContext.FileName);
var fileName = processContext.FileName;
var arguments = processContext.Arguments;
if (arguments == null)
{
arguments = string.Empty;
}
var tcs = new TaskCompletionSource <int>();
Log.Debug($"Running '{processContext.FileName}'");
try
{
#if NETFX_CORE
var launcher = Launcher.LaunchUriAsync(new Uri(fileName));
if (processCompletedCallback != null)
{
launcher.Completed += (sender, e) => tcs.SetResult(0);
}
#else
var processStartInfo = new ProcessStartInfo(fileName, arguments)
{
Verb = processContext.Verb
};
if (!string.IsNullOrWhiteSpace(processContext.WorkingDirectory))
{
processStartInfo.WorkingDirectory = processContext.WorkingDirectory;
}
var process = Process.Start(processStartInfo);
process.EnableRaisingEvents = true;
process.Exited += (sender, e) => tcs.SetResult(process.ExitCode);
#endif
}
catch (Exception ex)
{
Log.Error(ex, $"An error occurred while running '{processContext.FileName}'");
tcs.SetException(ex);
}
await tcs.Task;
return(new ProcessResult(processContext)
{
ExitCode = tcs.Task.Result
});
}
/// <summary>
/// Starts a process and returns an awaitable task which will end once the application is closed.
/// </summary>
/// <param name="processContext">The process context of an application file to run in the process.</param>
/// <returns>The <see cref="ProcessResult"/> containing details about the execution.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="processContext"/> is <c>null</c>.</exception>
public virtual async Task <ProcessResult> RunAsync(ProcessContext processContext)
{
Argument.IsNotNull(nameof(processContext), processContext);
Argument.IsNotNullOrWhitespace(nameof(processContext.FileName), processContext.FileName);
var fileName = processContext.FileName;
var arguments = processContext.Arguments;
if (arguments is null)
{
arguments = string.Empty;
}
var tcs = new TaskCompletionSource <int>();
Log.Debug($"Running '{processContext.FileName}'");
try
{
#if UWP
await Launcher.LaunchUriAsync(new Uri(fileName));
#else
var processStartInfo = new ProcessStartInfo(fileName, arguments)
{
Verb = processContext.Verb,
UseShellExecute = processContext.UseShellExecute
};
// Note for debuggers: whenever you *inspect* processStartInfo *and* use UseShellExecute = true,
// the debugger will evaluate the Environment and EnvironmentVariables properties and instantiate them.
// This will result in Process.Start to throw exceptions. The solution is *not* to inspect processStartInfo
// when UseShellExecute is true
if (!string.IsNullOrWhiteSpace(processContext.Verb) &&
!processStartInfo.UseShellExecute)
{
Log.Warning($"Verb is specified, this requires UseShellExecute to be set to true");
processStartInfo.UseShellExecute = true;
}
if (!string.IsNullOrWhiteSpace(processContext.WorkingDirectory))
{
processStartInfo.WorkingDirectory = processContext.WorkingDirectory;
}
var process = Process.Start(processStartInfo);
if (process is null)
{
Log.Debug($"Process is already completed, cannot wait for it to complete");
tcs.SetResult(0);
}
else
{
process.EnableRaisingEvents = true;
process.Exited += (sender, e) => tcs.SetResult(process.ExitCode);
}
#endif
}
catch (Exception ex)
{
Log.Error(ex, $"An error occurred while running '{processContext.FileName}'");
tcs.SetException(ex);
}
await tcs.Task;
return(new ProcessResult(processContext)
{
ExitCode = tcs.Task?.Result ?? 0
});
}
