Question

我正在尝试使用Windows Service创建一个TopShelf，并且在此服务中我想启动一个Windows Form。创建服务并调试后，调用ShowDialog表单不显示：

服务

 class SimpleServ {
    private Task task;
    private const string PATH = @"D:/out.txt";
    private Logger logger;
    private CancellationTokenSource src = new CancellationTokenSource();
    public SimpleServ() {
        logger = new Logger();

    }
    public void Start() {

        logger.Log("Started");
        this.task = Task.Run(async () => {

            var fm = new Fm(logger);
            while (true) {
                fm.ShowDialog();
                logger.Log("Just closed the dialog");
                await Task.Delay(3000);
            }
        });
    }
    public void Stop() {
        logger.Log("Stopped service");
    }
}

表格

public partial class Fm : Form {
    private Logger log;
    public Fm(Logger log) {
        this.log = log;
        this.log.Log("From Form constructor");
        InitializeComponent();

    }

    private void button1_Click(object sender, EventArgs e) {
        this.log.Log("Button clicked");
        this.Close();
    }
}

主要

class Program {
        static void Main(string[] args) {
            var exitCode = HostFactory.Run(x => {
                x.Service<SimpleServ>(s => {
                    s.ConstructUsing(h => new SimpleServ());
                    s.WhenStarted(h => h.Start());
                    s.WhenStopped(h => h.Stop());
                });
                x.RunAsLocalSystem();
                x.SetServiceName("SimpleService");
                x.SetDisplayName("Simple Service");
                x.SetDescription("Simple serv description");

            });
            int exitCodeValue = (int)Convert.ChangeType(exitCode, exitCode.GetTypeCode());
            Environment.ExitCode = exitCodeValue;
        }
    }

我已经全心投入这项服务，并且在到达ShowDialog行之后，什么也没有发生。

更新
我还添加了Logger来记录所有重要事件，到目前为止，似乎表单已打开，但我看不到它：

记录器

public class Logger {
        private string path;
        public Logger(string logPath=Constants.PATH) {
            this.path = logPath;
        }
        private object @lock = new object();
        public void Log(string message) {
            string formattedMessage = "Date:" + DateTime.Now.ToString() + "\tMessage:" + message;
            File.AppendAllLines(this.path, new string[] { formattedMessage });
        }
    }

文件的输出为：

Date:6/12/2019 11:19:13 AM  Message:Started
Date:6/12/2019 11:19:13 AM  Message:From Form constructor

Answer 1

在当今世界中，会话0隔离（一种防止Shatter attacks的重要安全措施）是本国法律，对于任何依赖于服务交互的设计，您都应该仔细考虑。

最佳做法是将您的解决方案重组为：

在后台运行的服务，独立于用户
与服务交互的常规GUI应用程序，可以由任何用户运行

Windows服务无法打开Windows窗体

1 个答案: