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QuestionPlease help me to figure out a purpose of this code. Pin
Pew_new4-Sep-18 10:00
memberPew_new4-Sep-18 10:00 
This is in a Class called ST:

 public Class ST
{
   private readonly System.Timers.Timer _timer;
   private DateTime _lastScanTime;
  
 public ST()
        {
            
            _timer = new System.Timers.Timer();
            _timer.Interval = 250;
            _timer.Start();
            _timer.Elapsed += OnTimerElapsed;
        }



         public TimeSpan ScanTime { get; private set; }

          private void OnTimerElapsed(object sender, ElapsedEventArgs e)
        {
            try
            {
                _timer.Stop();
                ScanTime = DateTime.Now - _lastScanTime;
                
                OnValuesRefreshed();
            }
            finally
            {
                _timer.Start();
            }
            _lastScanTime = DateTime.Now;
        }
        
        private void OnValuesRefreshed()
        {
            ValuesRefreshed?.Invoke(this, new EventArgs());
        }
}


Then a value of Scantime is being transferred via MVVM pattern (ViewModel) to UI.
The major question is what do we really have valuable when we do a substraction as follows: ScanTime = DateTime.Now - _lastScanTime? This point I can't figure out.

Thanks in advance!
AnswerRe: Please help me to figure out a purpose of this code. Pin
Mycroft Holmes4-Sep-18 11:29
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Pew_new4-Sep-18 18:31
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Mycroft Holmes4-Sep-18 19:18
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Pew_new4-Sep-18 22:25
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AnswerRe: Please help me to figure out a purpose of this code. Pin
Richard MacCutchan4-Sep-18 21:52
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Pew_new4-Sep-18 22:30
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GeneralRe: Please help me to figure out a purpose of this code. Pin
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Pew_new4-Sep-18 22:45
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GeneralRe: Please help me to figure out a purpose of this code. Pin
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GeneralRe: Please help me to figure out a purpose of this code. Pin
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GeneralRe: Please help me to figure out a purpose of this code. Pin
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GeneralRe: Please help me to figure out a purpose of this code. Pin
Mycroft Holmes5-Sep-18 11:21
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GeneralRe: Please help me to figure out a purpose of this code. Pin
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AnswerRe: Please help me to figure out a purpose of this code. Pin
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