VB.NET Timer类代码示例

本文整理汇总了VB.NET中System.Timers.Timer类的典型用法代码示例。如果您正苦于以下问题：VB.NET Timer类的具体用法？VB.NET Timer怎么用？VB.NET Timer使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了Timer类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。

示例1: Example

' 导入命名空间
Imports System.Timers

Public Module Example
    Private aTimer As System.Timers.Timer

    Public Sub Main()
        SetTimer()

      Console.WriteLine("{0}Press the Enter key to exit the application...{0}",
                        vbCrLf)
      Console.WriteLine("The application started at {0:HH:mm:ss.fff}",
                        DateTime.Now)
      Console.ReadLine()
      aTimer.Stop()
      aTimer.Dispose()

      Console.WriteLine("Terminating the application...")
    End Sub

    Private Sub SetTimer()
        ' Create a timer with a two second interval.
        aTimer = New System.Timers.Timer(2000)
        ' Hook up the Elapsed event for the timer. 
        AddHandler aTimer.Elapsed, AddressOf OnTimedEvent
        aTimer.AutoReset = True
        aTimer.Enabled = True
    End Sub

    ' The event handler for the Timer.Elapsed event. 
    Private Sub OnTimedEvent(source As Object, e As ElapsedEventArgs)
        Console.WriteLine("The Elapsed event was raised at {0:HH:mm:ss.fff}",
                          e.SignalTime)
    End Sub 
End Module

输出：

Press the Enter key to exit the application...

The application started at 09:40:29.068
The Elapsed event was raised at 09:40:31.084
The Elapsed event was raised at 09:40:33.100
The Elapsed event was raised at 09:40:35.100
The Elapsed event was raised at 09:40:37.116
The Elapsed event was raised at 09:40:39.116
The Elapsed event was raised at 09:40:41.117
The Elapsed event was raised at 09:40:43.132
The Elapsed event was raised at 09:40:45.133
The Elapsed event was raised at 09:40:47.148

Terminating the application...

示例2: Example

' 导入命名空间
Imports System.Threading.Tasks
Imports System.Timers

Public Module Example
   Public Sub Main()
      Dim timer As New Timer(1000)  
      AddHandler timer.Elapsed, AddressOf Example.HandleTimer     
      'timer.Elapsed = Async ( sender, e ) => await HandleTimer()
      timer.Start()
      Console.Write("Press any key to exit... ")
      Console.ReadKey()
   End Sub

   Private Async Sub HandleTimer(sender As Object, e As EventArgs)
      Await Task.Run(Sub()
                        Console.WriteLine()
                        Console.WriteLine("Handler not implemented..." )
                        Throw New NotImplementedException()
                     End Sub)   
   End Sub
End Module

输出：

Press any key to exit...
Handler not implemented...

Unhandled Exception: System.NotImplementedException: The method or operation is not implemented.
at Example._Lambda$__1()
at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Example.VB$StateMachine_0_HandleTimer.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c__DisplayClass2.b__5(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()

注：本文中的System.Timers.Timer类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。