WPF实现定时刷新UI界面功能

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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。