启动过程并不总是启动

Question

I have the following function:

public static void ExecuteNewProcess(string fileToExecute, Action<string> writeToConsole)
{
    ProcessStartInfo startInfo = new ProcessStartInfo(fileToExecute);
    Process processToExecute = new Process();

    startInfo.UseShellExecute = true;
    processToExecute.StartInfo = startInfo;

    if (!File.Exists(fileToExecute))
    {
        throw new FileNotFoundException("File not found for execution");
    }

    if (processToExecute.Start())
    {
        Thread.Sleep(6000);
        Process[] procs = Process.GetProcesses();

        if (IsProcessOpen(Path.GetFileNameWithoutExtension(fileToExecute)))
        {
            writeToConsole(fileToExecute + " launched successfully...");
        }
        else
        {
            writeToConsole(fileToExecute + " started but not found.");
            throw new Exception("Application started butnot found running...Delay = 6000, File Name = " + Path.GetFileNameWithoutExtension(fileToExecute));               
        }

    }
    else
    {
        writeToConsole("Error Launching application: " + fileToExecute);
        throw new Exception("Application did not launch " + fileToExecute);
    }

}

private static bool IsProcessOpen(string name)
{

    foreach (Process clsProcess in Process.GetProcesses())
    {

        if (clsProcess.ProcessName.Contains(name))
        {

            return true;
        }
    }

    return false;
}

So the problem is that sometimes my application that I am trying to start with this function is not starting (It starts about 80% of the time). However I do go through the part of the code that checks to make sure it started and outputs as such. I am not sure why it is not starting. I double click the application when I see it doesnt start to make sure its a valid exe. It always is and starts fine. I have also tried using the shell and not using the shell. No difference.

I am thinking that processToExecute is getting cleaned up before the application has successfully started all the way. Just a guess though.

I appreciate your help in advance.

I put in a few sleeps to see if it was just happening too fast.

Answer 1

The reason 20% of time your application don't show up when started by Process because of the time the application takes load before we see the user Interface

So their are two ways through which you might be able to achieve it

1. start the process - > process.Start(); And then process.WaitForInputIdle();

OR

 2. start the process - > process.Start(); And then  Thread.Sleep(1000);
    //make sure you give reasonable milliseconds