欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

WPF实现定时刷新UI界面的实例详解

程序员文章站 2022-03-18 19:29:09
...
这篇文章主要为大家详细介绍了WPF实现定时刷新UI界面功能,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

本文实例为大家分享了WPF定时刷新UI界面展示的具体代码,供大家参考,具体内容如下

代码:

using NHibernate.Criterion;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Visifire.Charts;

namespace SunCreate.CombatPlatform.Client
{
  public partial class MainPage : UserControl
  {
    private System.Timers.Timer timerNotice = null;

    public MainPage()
    {
      InitializeComponent();
    }

    private void MainPage_Loaded(object sender, RoutedEventArgs e)
    {
      #region 通知公告
      if (timerNotice == null)
      {
        BindNotice();

        timerNotice = new System.Timers.Timer();
        timerNotice.Elapsed += new System.Timers.ElapsedEventHandler((o, eea) =>
        {
          BindNotice();
        });
        timerNotice.Interval = 60 * 1000;
        timerNotice.Start();
      }
      #endregion
    }

    private void MainPage_SizeChanged(object sender, SizeChangedEventArgs e)
    {

    }

    #region 绑定通知公告
    private void BindNotice()
    {
      System.Threading.Tasks.Task.Factory.StartNew(() =>
      {
        try
        {
          int total = 0;
          TES_NOTICE info = new TES_NOTICE();
          IList<TES_NOTICE> list = new List<TES_NOTICE>();

          list = HI.Get<INoticeService>().GetListPage(null, DateTime.MinValue, DateTime.MinValue, 1, 50, ref total);

          Dispatcher.Invoke(new Action(() =>
          {
            noticeListView.ItemsSource = list;
          }));
        }
        catch
        {

        }
      });
    }
    #endregion

  }
}

说明:在 System.Timers.Timer 的事件中使用 BackgroundWorker 是无效的,即如下代码不能正常刷新界面:

using NHibernate.Criterion;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Visifire.Charts;

namespace SunCreate.CombatPlatform.Client
{
  public partial class MainPage : UserControl
  {
    private System.Timers.Timer timerNotice = null;

    public MainPage()
    {
      InitializeComponent();
    }

    private void MainPage_Loaded(object sender, RoutedEventArgs e)
    {
      #region 通知公告
      if (timerNotice == null)
      {
        BindNotice();

        timerNotice = new System.Timers.Timer();
        timerNotice.Elapsed += new System.Timers.ElapsedEventHandler((o, eea) =>
        {
          BindNotice();
        });
        timerNotice.Interval = 60 * 1000;
        timerNotice.Start();
      }
      #endregion
    }

    private void MainPage_SizeChanged(object sender, SizeChangedEventArgs e)
    {

    }

    #region 绑定通知公告
    private void BindNotice()
    {
      PT_USER_INFO user = new PT_USER_INFO();
      IList<TES_COMBAT_TASK> taskList = new List<TES_COMBAT_TASK>();

      BackgroundWorker worker = new BackgroundWorker();
      worker.DoWork += (s, e) =>
      {
        user = HI.Get<Cache.ICacheService>().UserCache.GetCurrentUserInfo();
        taskList = HI.Get<ITaskService>().GetCombatTaskByUserIDUnfinished(user.ID.ToString());

      };
      worker.RunWorkerCompleted += (s, e) =>
      {
        try
        {
          taskListView.ItemsSource = taskList;
        }
        catch { }
      };
      worker.RunWorkerAsync();
    }
    #endregion

  }
}

也可以使用 DispatcherTimer 刷新界面,但耗时的操作不能放在DispatcherTimer的事件中执行,否则界面会卡,那么耗时的定时操作,比如查询数据库,需要再用一个 System.Timers.Timer,相对比较麻烦。

以上就是WPF实现定时刷新UI界面的实例详解的详细内容,更多请关注其它相关文章!