using System;
using System.Collections;
using System.Windows.Forms;
using System.ServiceProcess;
using System.Configuration.Install;

namespace WindowsServiceClient
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string serviceFilePath = $"{Application.StartupPath}\\MyWindowsService.exe";
        string serviceName = "MyService";

        //事件：安装服务
        private void button1_Click(object sender, EventArgs e)
        {
            if (this.IsServiceExisted(serviceName)) this.UninstallService(serviceName);
            this.InstallService(serviceFilePath);
        }

        //事件：启动服务
        private void button2_Click(object sender, EventArgs e)
        {
            if (this.IsServiceExisted(serviceName)) this.ServiceStart(serviceName);
        }

        //事件：停止服务
        private void button4_Click(object sender, EventArgs e)
        {
            if (this.IsServiceExisted(serviceName)) this.ServiceStop(serviceName);
        }

        //事件：卸载服务
        private void button3_Click(object sender, EventArgs e)
        {
            if (this.IsServiceExisted(serviceName))
            {
                this.ServiceStop(serviceName);
                this.UninstallService(serviceFilePath);
            }
        }

        //判断服务是否存在
        private bool IsServiceExisted(string serviceName)
        {
            ServiceController[] services = ServiceController.GetServices();
            foreach (ServiceController sc in services)
            {
                if (sc.ServiceName.ToLower() == serviceName.ToLower())
                {
                    return true;
                }
            }
            return false;
        }

        //安装服务
        private void InstallService(string serviceFilePath)
        {
            using (AssemblyInstaller installer = new AssemblyInstaller())
            {
                installer.UseNewContext = true;
                installer.Path = serviceFilePath;
                IDictionary savedState = new Hashtable();
                installer.Install(savedState);
                installer.Commit(savedState);
            }
        }

        //卸载服务
        private void UninstallService(string serviceFilePath)
        {
            using (AssemblyInstaller installer = new AssemblyInstaller())
            {
                installer.UseNewContext = true;
                installer.Path = serviceFilePath;
                installer.Uninstall(null);
            }
        }
        //启动服务
        private void ServiceStart(string serviceName)
        {
            using (ServiceController control = new ServiceController(serviceName))
            {
                if (control.Status == ServiceControllerStatus.Stopped)
                {
                    control.Start();
                }
            }
        }

        //停止服务
        private void ServiceStop(string serviceName)
        {
            using (ServiceController control = new ServiceController(serviceName))
            {
                if (control.Status == ServiceControllerStatus.Running)
                {
                    control.Stop();
                }
            }
        }
        
        /// <summary>
        /// 点击窗体最小化时，隐藏任务栏和显示托盘图标
        /// </summary>
        /// <param name = "sender" ></ param >
        /// < param name="e"></param>
        private void Form1_Deactivate(object sender, EventArgs e)
        {
            //当窗体为最小化状态时
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.notifyIcon1.Visible = true; //显示托盘图标
                this.Hide();//隐藏窗体
                this.ShowInTaskbar = false;//图标不显示在任务栏
            }
        }

        /// <summary>
        /// 双击系统托盘的小图标事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Show();
                this.WindowState = FormWindowState.Normal; //还原窗体
                this.ShowInTaskbar = true;//图标显示在任务栏
            }
        }

        /// <summary>
        /// 关闭事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form1_FormClosing(object sender, FormClosingEventArgs e) 
        {
            DialogResult result;
            result = MessageBox.Show("确定退出吗？", "退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
            if (result == DialogResult.OK)
            {
                Application.ExitThread();
            }
            else
            {
                e.Cancel = true;
            }
        }
    }
}