[Visual Basic]
Public Class Timer
Inherits Component
[C#]
public class Timer : Component
[C++]
public __gc class Timer : public Component
[JScript]
public class Timer extends Component
线程安全
此类型的所有公共静态(Visual Basic 中为 Shared)成员对多线程操作而言都是安全的。但不保证任何实例成员是线程安全的。
[Visual Basic]
Public Class Class1
Private Shared myTimer As New System.Windows.Forms.Timer()
Private Shared alarmCounter As Integer = 1
Private Shared exitFlag As Boolean = False
' This is the method to run when the timer is raised.
Private Shared Sub TimerEventProcessor(myObject As Object, _
myEventArgs As EventArgs)
myTimer.Stop()
' Displays a message box asking whether to continue running the timer.
If MessageBox.Show("Continue running?", "Count is: " & alarmCounter, _
MessageBoxButtons.YesNo) = DialogResult.Yes Then
' Restarts the timer and increments the counter.
alarmCounter += 1
myTimer.Enabled = True
Else
' Stops the timer.
exitFlag = True
End If
End Sub
Public Shared Sub Main()
' Adds the event and the event handler for the method that will
' process the timer event to the timer.
AddHandler myTimer.Tick, AddressOf TimerEventProcessor
' Sets the timer interval to 5 seconds.
myTimer.Interval = 5000
myTimer.Start()
' Runs the timer, and raises the event.
While exitFlag = False
' Processes all the events in the queue.
Application.DoEvents()
End While
End Sub
End Class
[C#]
public class Class1 {
static System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
static int alarmCounter = 1;
static bool exitFlag = false;
// This is the method to run when the timer is raised.
private static void TimerEventProcessor(Object myObject,
EventArgs myEventArgs) {
myTimer.Stop();
// Displays a message box asking whether to continue running the timer.
if(MessageBox.Show("Continue running?", "Count is: " + alarmCounter,
MessageBoxButtons.YesNo) == DialogResult.Yes) {
// Restarts the timer and increments the counter.
alarmCounter +=1;
myTimer.Enabled = true;
}
else {
// Stops the timer.
exitFlag = true;
}
}
public static int Main() {
/* Adds the event and the event handler for the method that will
process the timer event to the timer. */
myTimer.Tick += new EventHandler(TimerEventProcessor);
// Sets the timer interval to 5 seconds.
myTimer.Interval = 5000;
myTimer.Start();
// Runs the timer, and raises the event.
while(exitFlag == false) {
// Processes all the events in the queue.
Application.DoEvents();
}
return 0;
}
}
[C++, JScript] 没有可用于 C++ 或 JScript 的示例。若要查看 Visual Basic 或 C# 示例,请单击页左上角的语言筛选器按钮 。