///<summary>Updates local time and Refreshes all time variables. Saves NIST server URL as preference.</summary>
private void SynchTimes()
{
this.Cursor = Cursors.WaitCursor;
//Get NistTime Offset
double nistOffset = GetNistOffset();
if (nistOffset == double.MaxValue) //Timed out
{
MsgBox.Show(this, "No response received from NIST time server. Click synch time after four seconds.");
this.Cursor = Cursors.Default;
return;
}
if (nistOffset == double.MinValue) //Invalid Nist Server Address
{
this.Cursor = Cursors.Default;
return;
}
double serverOffset = (MiscData.GetNowDateTimeWithMilli() - DateTime.Now).TotalMilliseconds;
//Get current times from offsets
_timeLocal = DateTime.Now;
_timeServer = _timeLocal.AddMilliseconds(serverOffset);
_timeNist = _timeLocal.AddMilliseconds(nistOffset);
try {
WindowsTime.SetTime(_timeNist); //Sets local machine time
}
catch {
MsgBox.Show(this, "Error setting local machine time.");
}
_timeLocal = DateTime.Now; //Update time since it has now been set
this.Cursor = Cursors.Default;
refreshDisplays();
}
///<summary>Called from FormOpenDental.Load. Updates local time and checks to see if server time is in synch, with a fast db call (only acurate to seconds, not miliseconds).</summary>
public bool TimesInSynchFast()
{
this.Cursor = Cursors.WaitCursor;
textNistUrl.Text = PrefC.GetString(PrefName.NistTimeServerUrl);
double nistOffset = GetNistOffset();
if (nistOffset == double.MaxValue) //Timed out
{
MsgBox.Show(this, "No response received from NIST time server. Click synch time after four seconds.");
this.Cursor = Cursors.Default;
return(false);
}
if (nistOffset == double.MinValue) //Invalid Nist Server Address
{
this.Cursor = Cursors.Default;
return(false);
}
//Get current times from offsets
_timeLocal = DateTime.Now;
Stopwatch stopwatch = new Stopwatch(); //Used to keep NIST time in time even when system fails to set local machine time (Can't pull it later)
stopwatch.Start();
_timeNist = _timeLocal.AddMilliseconds(nistOffset);
try {
WindowsTime.SetTime(_timeNist); //Sets local machine time
}
catch {
MsgBox.Show(this, "Error setting local machine time.");
}
_timeLocal = DateTime.Now; //Update time since it has now been set
double serverOffset = (MiscData.GetNowDateTime() - DateTime.Now).TotalSeconds; //Cannot get milliseconds from Now() in Mysql Pre-5.6.4, Only gets whole seconds.
_timeServer = _timeLocal.AddSeconds(serverOffset);
if (ServerInSynchFast() && LocalInSynch()) //All times in synch
{
return(true);
}
//Some times out of synch, so form will open, but we don't want to make another call to NIST server.
serverOffset = (MiscData.GetNowDateTimeWithMilli() - DateTime.Now).TotalSeconds; //_timeServer needs to be more accurate before displaying
_timeLocal = DateTime.Now;
stopwatch.Stop();
_timeServer = _timeLocal.AddSeconds(serverOffset);
_timeNist = _timeNist.AddMilliseconds(stopwatch.ElapsedMilliseconds);
this.Cursor = Cursors.Default;
return(false);
}