如何定期从WPF客户端应用程序使用的线程或定时执行的方法

问题描述

我开发一个 WPF 客户端application.This应用会定期将数据发送到 Web服务。当用户登录到应用程序，我想运行特定方法，每5 MTS将数据发送到的.asmx 服务。

I am developing a WPF client application.This app sends data periodically to the webservice. When user logged into the app I want run particular method every 5 mts to send data to the .asmx service.

我的问题是我是否需要使用线程或timer.This方法执行，同时用户与应用程序交互应该发生。
即如果没有这个方法执行期间阻塞UI

My question is whether I need to use threading or timer.This method execution should happen while user is interacting with the application.i.e without blocking the UI during this method execution

任何资源寻找？

推荐答案

我会建议使用新的异步的 System.Threading.Tasks 命名空间/等待关键字。

I would recommend the System.Threading.Tasks namespace using the new async/await keywords.

// The `onTick` method will be called periodically unless cancelled.
private static async Task RunPeriodicAsync(Action onTick,
                                           TimeSpan dueTime,
                                           TimeSpan interval,
                                           CancellationToken token)
{
  // Initial wait time before we begin the periodic loop.
  if(dueTime > TimeSpan.Zero)
    await Task.Delay(dueTime, token);

  // Repeat this loop until cancelled.
  while(!token.IsCancellationRequested)
  {
    // Call our onTick function.
    onTick?.Invoke();

    // Wait to repeat again.
    if(interval > TimeSpan.Zero)
      await Task.Delay(interval, token);
  }
}

然后你只需调用这个方法的话：

Then you would just call this method somewhere:

private void Initialize()
{
  var dueTime = TimeSpan.FromSeconds(5);
  var interval = TimeSpan.FromSeconds(5);

  // TODO: Add a CancellationTokenSource and supply the token here instead of None.
  RunPeriodicAsync(OnTick, dueTime, interval, CancellationToken.None);
}

private void OnTick()
{
  // TODO: Your code here
}

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