调度计时器不起作用 [英] Dispatch timer won't work
问题描述
我试图弄清楚调度计时器是如何工作的，以便我可以将它实现到我的程序中，我按照网站上的确切说明进行操作，并寻找有关堆栈溢出的答案.人们说他们的问题已经解决，但我有非常相似的代码，它不会工作......
I'm trying to figure out how a dispatch timer works so I can implement it into my program, I followed the exact instructions on a website and looked for answers on stack overflow. People said their problem was fixed but I have very similar code and it wont work...
错误是:
timer_Tick"没有重载匹配委托EventHandler
No overload for "timer_Tick" matches delegate "EventHandler<object>"
我能做什么?
public MainPage()
{
this.InitializeComponent();
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(1);
timer.Tick += timer_Tick;
timer.Start();
}
void timer_Tick(EventArgs e)
{
TimeRefresh();
}
推荐答案
您需要修复事件处理程序签名.它缺少发送者，第二个参数的类型只是 object.(请参阅文档.)
You need to fix the event handler signature. It's missing the sender and the type of the second parameter is just object. (See the documentation.)
void timer_Tick(object sender, object e)
{
TimeRefresh();
}
您还需要在类的顶部添加一个 using Windows.UI.Xaml;，或者使用完整的命名空间实例化计时器:
You also need to add a using Windows.UI.Xaml; to the top of your class, or instantiate the timer using the full namespace:
Windows.UI.Xaml.DispatcherTimer timer = new Windows.UI.Xaml.DispatcherTimer();
<小时>
如果有人偶然发现并使用 WPF，它有自己的 DispatchTimer.确保您引用的是WindowsBase"(默认情况下应该在那里).签名略有不同.
If anyone stumbles on this and is using WPF, it has it own DispatchTimer. Make sure you're referencing "WindowsBase" (should be there by default). The signature is slightly different.
void timer_Tick(object sender, EventArgs e)
{
TimeRefresh();
}
它所在的命名空间也不同.要么将 using System.Windows.Threading; 添加到顶部，要么使用完整的命名空间进行限定:
The namespace it lives in is different too. Either add using System.Windows.Threading; to the top, or qualify with the full namespace:
System.Windows.Threading.DispatcherTimer timer
= new System.Windows.Threading.DispatcherTimer();
<小时>
如果您使用的是 WinForms，则需要使用不同的计时器.阅读本文了解 WinForms Timer 和 WPF DispatchTimer 之间的区别.
If you're using WinForms, you want to use a different timer. Read this for the difference between the WinForms Timer and the WPF DispatchTimer.
这篇关于调度计时器不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
