It is not necessary to follow these guidelines, but they are the convention. If you try to get the ExitCode before the process has exited, the attempt throws an exception. Examine the HasExited property first to verify whether the associated process has terminated. When standard output has been redirected to asynchronous event handlers, it is possible that output processing will not have completed when HasExited returns true.
To ensure that asynchronous event handling has been completed, call the WaitForExit overload that takes no parameter before checking HasExited. You can use the CloseMainWindow or the Kill method to cause an associated process to exit. There are two ways of being notified when the associated process exits: synchronously and asynchronously. Synchronous notification relies on calling the WaitForExit method to pause the processing of your application until the associated component exits. Asynchronous notification relies on the Exited event.
When using asynchronous notification, EnableRaisingEvents must be set to true for the Process component to receive notification that the process has exited.
Community forum
Skip to main content. Contents Exit focus mode. Diagnostics Assembly: System. Gets the value that the associated process specified when it terminated. Note When standard output has been redirected to asynchronous event handlers, it is possible that output processing will not have completed when HasExited returns true.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. WaitForExit doesn't return even though Process. HasExited is true Ask Question. Asked 6 years, 5 months ago. Active 5 years, 1 month ago.
Viewed 12k times. But when I call Process. It creates a batch file, starts it and then prints: Process is still running Batch file is done! Process has exited. Exit code: Calling WaitForExit It should then print: WaitForExit returned. IO open System. Diagnostics open System.
Execute a Process and Wait Until it Finishes (VB.NET)
WriteAllText "foo. Data p.
AddHandler onOutput p. BeginErrorReadLine p. BeginOutputReadLine while not p. HasExited do printfn "Process is still running Sleep printfn "Process has exited. Why does WaitForExit never return?
What's the right way to wait for such a process to exit? Is it safe to just poll Process. HasExited or can that result in other problems? As the streams are still open, the file hasn't completely exited. Shouldn't these streams be closed when the process exits?
The cmd. Why do you call wait after it exited? This makes sure that you've read all the output that was produced by the process.
- The right way to run external process in .NET (async version) · GitHub.
- forex calgary tracking?
- colorconversionstrategy ghostscript.
- Ask a Question.
We can't see what "onOutput" does, but high odds that it deadlocks your program because it does something nasty like assuming that your main thread is idle when it is actually stuck in WaitForExit. Show 2 more comments. Active Oldest Votes. For example C , because I don't know F well enough to slap a code example like this together quickly : : using System; using System. Diagnostics; using System.
C# (applications return code to OS)
IO; using System. StandardError ; Console. WaitForExit ; Console. WriteLine "Process has exited.
Process.WaitForExitAsync is not the async equivalent of Process.WaitForExit in .NET 5
ExitCode ; Console. WriteLine "WaitForExit returned. Peter Duniho Peter Duniho Sorry for the delay - I tried this today and it seems to work. Thanks — stmax Nov 19 '14 at Glad it helped. It was an interesting problem, and I learned something myself, thanks to your well-researched question.