在 Windows 8 应用程序中为 DispatcherTimer 的 Tick 事件定义事件处理程序 [英] defining event handler for Tick event of DispatcherTimer in windows 8 app

问题描述

我正在 Windows 8 Visual Studio 11 中开发一个应用程序，我想为 DispatcherTimer 实例定义一个事件处理程序，如下所示:

I am developing an application in windows 8 Visual studio 11, and I want to define an event handler for a DispatcherTimer instance as below:

public sealed partial class BlankPage : Page
    {

        int timecounter = 10;
        DispatcherTimer timer = new DispatcherTimer();
        public BlankPage()
        {
            this.InitializeComponent();
            timer.Tick += new EventHandler(HandleTick);
        }

        private void HandleTick(object s,EventArgs e)
        {

            timecounter--;
            if (timecounter ==0)
            {
                //disable all buttons here
            }
        }
        .....
}

但我收到以下错误:

Cannot implicitly convert type 'System.EventHandler' to 'System.EventHandler<object>'

我是寡妇 8 个应用程序的新手开发者.

I am a novice developer to widows 8 apps.

你能帮我吗?

推荐答案

差不多了 :) 你不需要实例化一个新的 eventhandler 对象，你只需要指向处理事件的方法.因此，一个事件处理程序.

almost had it :) You don't need to instantiate a new eventhandler object, you only need to point to the method that handles the event. Hence, an eventhandler.

        int timecounter = 10;
    DispatcherTimer timer = new DispatcherTimer();
    public BlankPage()
    {
        this.InitializeComponent();

        timer.Tick += timer_Tick;
    }

    protected void timer_Tick(object sender, object e)
    {
        timecounter--;
        if (timecounter == 0)
        {
            //disable all buttons here
        }
    }

尝试阅读代表以了解事件 了解事件和事件C#中的处理程序

Try to read up on delegates to understand events Understanding events and event handlers in C#

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