本文整理汇总了VB.NET中System.Threading.TimerCallback代理的典型用法代码示例。如果您正苦于以下问题:VB.NET TimerCallback代理的具体用法?VB.NET TimerCallback怎么用?VB.NET TimerCallback使用的例子?那么, 这里精选的代理代码示例或许可以为您提供帮助。
在下文中一共展示了TimerCallback代理的1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: Main
' 导入命名空间
Imports System.Threading
Public Module Example
Public Sub Main()
' Use an AutoResetEvent to signal the timeout threshold in the
' timer callback has been reached.
Dim autoEvent As New AutoResetEvent(False)
Dim statusChecker As New StatusChecker(10)
' Create a timer that invokes CheckStatus after one second,
' and every 1/4 second thereafter.
Console.WriteLine("{0:h:mm:ss.fff} Creating timer." & vbCrLf,
DateTime.Now)
Dim stateTimer As New Timer(AddressOf statusChecker.CheckStatus,
autoEvent, 1000, 250)
' When autoEvent signals, change the period to every half second.
autoEvent.WaitOne()
stateTimer.Change(0, 500)
Console.WriteLine(vbCrLf & "Changing period to .5 seconds." & vbCrLf)
' When autoEvent signals the second time, dispose of the timer.
autoEvent.WaitOne()
stateTimer.Dispose()
Console.WriteLine(vbCrLf & "Destroying timer.")
End Sub
End Module
Public Class StatusChecker
Dim invokeCount, maxCount As Integer
Sub New(count As Integer)
invokeCount = 0
maxCount = count
End Sub
' The timer callback method.
Sub CheckStatus(stateInfo As Object)
Dim autoEvent As AutoResetEvent = DirectCast(stateInfo, AutoResetEvent)
invokeCount += 1
Console.WriteLine("{0:h:mm:ss.fff} Checking status {1,2}.",
DateTime.Now, invokeCount)
If invokeCount = maxCount Then
' Reset the counter and signal the waiting thread.
invokeCount = 0
autoEvent.Set()
End If
End Sub
End Class
输出:
11:59:54.202 Creating timer. 11:59:55.217 Checking status 1. 11:59:55.466 Checking status 2. 11:59:55.716 Checking status 3. 11:59:55.968 Checking status 4. 11:59:56.218 Checking status 5. 11:59:56.470 Checking status 6. 11:59:56.722 Checking status 7. 11:59:56.972 Checking status 8. 11:59:57.223 Checking status 9. 11:59:57.473 Checking status 10. Changing period to .5 seconds. 11:59:57.474 Checking status 1. 11:59:57.976 Checking status 2. 11:59:58.476 Checking status 3. 11:59:58.977 Checking status 4. 11:59:59.477 Checking status 5. 11:59:59.977 Checking status 6. 12:00:00.478 Checking status 7. 12:00:00.980 Checking status 8. 12:00:01.481 Checking status 9. 12:00:01.981 Checking status 10. Destroying timer.