Timer::Change Method (Int64, Int64)

.NET Framework (current version)

Changes the start time and the interval between method invocations for a timer, using 64-bit signed integers to measure time intervals.

Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

public:
bool Change(
	long long dueTime,
	long long period
)

Parameters

dueTime: Type: System::Int64
The amount of time to delay before the invoking the callback method specified when the Timer was constructed, in milliseconds. Specify Timeout::Infinite to prevent the timer from restarting. Specify zero (0) to restart the timer immediately.

period: Type: System::Int64
The time interval between invocations of the callback method specified when the Timer was constructed, in milliseconds. Specify Timeout::Infinite to disable periodic signaling.

Return Value

Type: System::Boolean

true if the timer was successfully updated; otherwise, false.

Exceptions

Exception	Condition
ObjectDisposedException	The Timer has already been disposed.
ArgumentOutOfRangeException	The dueTime or period parameter is less than -1.
NotSupportedException	The dueTime or period parameter is greater than 4294967294.

Remarks

The callback method is invoked once after dueTime elapses, and thereafter each time the time interval specified by period elapses.

If dueTime is zero (0), the callback method is invoked immediately. If dueTime is Timeout::Infinite, the callback method is never invoked; the timer is disabled, but can be re-enabled by calling Change and specifying a positive value for dueTime.

If period is zero (0) or Timeout::Infinite, and dueTime is not Timeout::Infinite, the callback method is invoked once; the periodic behavior of the timer is disabled, but can be re-enabled by calling Change and specifying a positive value for period.

The Change method can be called from the TimerCallback delegate.

Version Information

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0