Metro应用程序的C＃中倒数计时器？ [英] Countdown Timer in C# for Metro App ?

问题描述

您好，我需要构建一个使用倒计时（年，日，小时，分钟，秒）的应用。我已经尝试编写代码并且我成功计算了时间，但是当我尝试将此时间作为字符串存储在texblock中时，他没有更新。任何人都可以帮我设置文本块来更新自己吗？

注意：我是C＃和Metro App的初学者。抱歉我的英语不好。

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.IO; 
 使用 System.Linq; 
 使用 Windows.Foundation; 
 使用 Windows.Foundation.Collections; 
 使用 Windows.UI.Xaml; 
 使用 Windows.UI.Xaml.Controls; 
 使用 Windows.UI.Xaml.Controls.Primitives; 
 使用 Windows.UI.Xaml.Data; 
 使用 Windows.UI.Xaml.Input; 
 使用 Windows.UI.Xaml.Media; 
 使用 Windows.UI.Xaml.Navigation; 
 
 
 命名空间 Christmas_Countdown 
 {
  public  密封 部分 类 MainPage：Page 
 {
  public  MainPage（）
 {
  this  .InitializeComponent（）; 
} 
 
 受保护 覆盖  void  OnNavigatedTo（NavigationEventArgs e）
 {
} 
 
  private   void  Button_Click_1（ object  sender，RoutedEventArgs e）
 {
 
 DispatcherTimer t = < span class =code-keyword> new  DispatcherTimer（）; 
 DateTime endtime =  new  DateTime（ 2012 ， 12 ， 25 ， 0 ， 0 ， 0 ）; 
 DateTime now = DateTime.Now; 
 t.Interval = endtime  -  now; 
 TimeSpan ts = t.Interval; 
 t.Start（）; 
 
  string  countDown =  string  .Format（  {0}天，{1}小时，{2}分钟，{3}秒到圣诞节。，t。Interval。 Days，t.Interval.Hours，t.Interval.Minutes，t.Interval.Seconds）; 
 Day_TxtBlk.Text = countDown; 
} 
 
  private   void  Day_TxtBlk_Loaded（ object  sender，RoutedEventArgs e）
 {
 
} 
 
 
 
} 
 } 

解决方案

我找到了解决问题的方法。



< pre lang =c＃> void t_Tick（ object sender，对象 e）
{
TimeSpan ts = endtime.Subtract（DateTime.Now）;

string countdowndays = ts.Days.ToString（）;
daytxtblk.Text = countdowndays;

string countdownhours = ts.Hours.ToString（）;
hourstxtblk.Text = countdownhours;

string countdownminutes = ts.Minutes.ToString（）;
minutetxtblk.Text = countdownminutes;

string countdownseconds = ts.Seconds.ToString（）;
sectxtblk.Text = countdownseconds;
}


private void christmas_2012_Click（< span class =code-keyword> object sender，RoutedEventArgs e）
{


if （ this .IsEnabled）
{
txtboxchr.Visibility = Visibility.Visible;
txtboxhours.Visibility = Visibility.Visible;
txtboxminutes.Visibility = Visibility.Visible;
txtboxseconds.Visibility = Visibility.Visible;

daytxtblk.Visibility = Visibility.Visible;
hourstxtblk.Visibility = Visibility.Visible;
minutetxtblk.Visibility = Visibility.Visible;
sectxtblk.Visibility = Visibility.Visible;
}


t = new DispatcherTimer（）;
endtime = new DateTime（ 2012 ， 12 ， 25 ， 0 ， 0 ， 0 ）;

if （DateTime.Now.Year > endtime.Year）
{
t.Stop（）;
txtboxchr.Visibility = Visibility.Collapsed;
txtboxhours.Visibility = Visibility.Collapsed;
txtboxminutes.Visibility = Visibility.Collapsed;
txtboxseconds.Visibility = Visibility.Collapsed;

daytxtblk.Visibility = Visibility.Collapsed;
hourstxtblk.Visibility = Visibility.Collapsed;
minutetxtblk.Visibility = Visibility.Collapsed;
sectxtblk.Visibility = Visibility.Collapsed;
pleasesetdat（）;
}
其他
{
t.Interval = new TimeSpan（ 1000 ）;
TimeSpan ts = endtime.Subtract（DateTime.Now）;
t.Tick + = t_Tick;
t.Start（）;
}
}

Hello, i need to build an app that use a countdown (Years, Days, Hour, Minutes, Seconds). I''ve tried to write a code and i succeed to calculate the time, but when i try to put this time as a string in a texblock, he is not updating. Can anyone help me to set the textblock to update himself ?
Notice: I''m a beginner in C# and Metro App''s. And sorry for my bad english.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;


namespace Christmas_Countdown
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {

            DispatcherTimer t = new DispatcherTimer();
            DateTime endtime = new DateTime(2012, 12, 25, 0, 0, 0);
            DateTime now = DateTime.Now;
            t.Interval = endtime - now;
            TimeSpan ts = t.Interval;
            t.Start();

            string countDown = string.Format("{0} Days, {1} Hours, {2} Minutes, {3} Seconds til Christmas.", t.Interval.Days, t.Interval.Hours, t.Interval.Minutes, t.Interval.Seconds);
            Day_TxtBlk.Text = countDown;
        }

        private void Day_TxtBlk_Loaded(object sender, RoutedEventArgs e)
        {
            
        }



    }
}

解决方案

I found the solution to my problem.

void t_Tick(object sender, object e)
        {
            TimeSpan ts = endtime.Subtract(DateTime.Now);

            string countdowndays = ts.Days.ToString();
            daytxtblk.Text = countdowndays;

            string countdownhours = ts.Hours.ToString();
            hourstxtblk.Text = countdownhours;

            string countdownminutes = ts.Minutes.ToString();
            minutetxtblk.Text = countdownminutes;

            string countdownseconds = ts.Seconds.ToString();
            sectxtblk.Text = countdownseconds;
        }


        private void christmas_2012_Click(object sender, RoutedEventArgs e)
        {
            

            if (this.IsEnabled)
            {
                txtboxchr.Visibility = Visibility.Visible;
                txtboxhours.Visibility = Visibility.Visible;
                txtboxminutes.Visibility = Visibility.Visible;
                txtboxseconds.Visibility = Visibility.Visible;

                daytxtblk.Visibility = Visibility.Visible;
                hourstxtblk.Visibility = Visibility.Visible;
                minutetxtblk.Visibility = Visibility.Visible;
                sectxtblk.Visibility = Visibility.Visible;
            }
           

            t = new DispatcherTimer();
            endtime = new DateTime(2012, 12, 25, 0, 0, 0);
            
            if (DateTime.Now.Year > endtime.Year)
            {
                t.Stop();
                txtboxchr.Visibility = Visibility.Collapsed;
                txtboxhours.Visibility = Visibility.Collapsed;
                txtboxminutes.Visibility = Visibility.Collapsed;
                txtboxseconds.Visibility = Visibility.Collapsed;

                daytxtblk.Visibility = Visibility.Collapsed;
                hourstxtblk.Visibility = Visibility.Collapsed;
                minutetxtblk.Visibility = Visibility.Collapsed;
                sectxtblk.Visibility = Visibility.Collapsed;
                pleasesetdat();
            }
            else 
            {
                t.Interval = new TimeSpan(1000);
                TimeSpan ts = endtime.Subtract(DateTime.Now);
                t.Tick += t_Tick;
                t.Start();
            }
        }

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