Question

因此，我试图制作一个显示本地窗口服务信息的数据网格，特别是我的，我想拥有服务的显示名称和状态，然后点击按钮开始或停止。我可以很好地链接按钮方法，但服务状态不会改变，任何建议如何使这个属性可以观察到数据网格，并且还可以根据状态从开始到停止动态更改按钮，其次我如果可能，我想使stop命令成为一个按钮命令。

有什么建议吗？

Answer 1

您需要将服务包装到您自己的实现INotifyPropertyChanged的类中。在启动/停止服务时，请在该实例上引发属性更改事件。

Answer 2

这是我最终实施的内容。它在大多数情况下都运行良好，但我可以提供任何人可能的代码建议。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.ServiceProcess;

namespace v7quickbar
{
    class NotifiableServiceController : INotifyPropertyChanged
    {

        private ServiceController m_oServiceController = null;
        private System.Timers.Timer m_oServiceCheckTimer = new System.Timers.Timer();

        public ServiceControllerStatus Status { get { return this.m_oServiceController.Status; } }

        public string DisplayName { get { return this.m_oServiceController.DisplayName; } }

        public string ServiceName { get { return this.m_oServiceController.ServiceName; } }

        public bool CanStop { get { return this.m_oServiceController.CanStop; } }

        public NotifiableServiceController(ServiceController oService)
        {
            CreateObject(oService, TimeSpan.FromSeconds(.5));
        }

        public NotifiableServiceController(ServiceController oService, TimeSpan oInterval)
        {
            CreateObject(oService, oInterval);
        }

        private void CreateObject(ServiceController oService, TimeSpan oInterval)
        {
            m_oServiceController = oService;
            m_oServiceCheckTimer.Interval = oInterval.TotalMilliseconds;

            m_oServiceCheckTimer.Elapsed += new System.Timers.ElapsedEventHandler(m_oServiceCheckTimer_Elapsed);
            m_oServiceCheckTimer.Start();
        }

        public void Start()
        {
            try
            {
                this.m_oServiceController.Start();
                this.m_oServiceController.WaitForStatus(ServiceControllerStatus.Running);
            }
            catch (Exception)
            {
            }
        }

        public void Stop()
        {
            try
            {
                this.m_oServiceController.Stop();
                this.m_oServiceController.WaitForStatus(ServiceControllerStatus.Stopped);
            }
            catch (Exception)
            {
            }
        }

        public void Restart()
        {
            try
            {
                if (m_oServiceController.CanStop && (m_oServiceController.Status == ServiceControllerStatus.Running || m_oServiceController.Status == ServiceControllerStatus.Paused))
                {
                    this.Stop();
                    this.m_oServiceController.WaitForStatus(ServiceControllerStatus.Stopped);
                }

                if (m_oServiceController.Status == ServiceControllerStatus.Stopped)
                {
                    this.Start();
                    this.m_oServiceController.WaitForStatus(ServiceControllerStatus.Running);
                }
            }
            catch (Exception)
            {
            }
        }

        void m_oServiceCheckTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            ServiceControllerStatus oCurrentStatus = m_oServiceController.Status;
            m_oServiceController.Refresh();

            if (oCurrentStatus != m_oServiceController.Status)
            {
                PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Status"));
            }

        }

        public static IEnumerable<NotifiableServiceController> GetServices()
        {
            List<NotifiableServiceController> oaServices = new List<NotifiableServiceController>();
            foreach (ServiceController sc in ServiceController.GetServices())
            {
                oaServices.Add(new NotifiableServiceController(sc));
            }

            return oaServices;
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}

Answer 3

可悲的是，因为ServiceController.GetServices()调用总是会返回一个数组，所以我们必须有DispatcherTimer并且在它的勾号中调用ServiceController.GetServices()并且为那个持有该属性的属性引发更改的通知属性一系列服务。

为了可观察性而使其可观察是不实际的权利？无论如何，我们不会从中获得任何优势。

WPF使ServiceController []可观察

3 个答案: