| public GetNextValidTimeAfter ( DateTimeOffset date ) : DateTimeOffset? | ||
| date | DateTimeOffset | the date/time at which to begin the search for the next valid date/time |
| return | DateTimeOffset? | |
/// <summary>
/// Understanding how to generate the
/// </summary>
/// <param name="crondetailsstring"></param>
/// <param name="startDate"></param>
/// <param name="endDate"></param>
/// <returns></returns>
public static DateTime?ReturnNextOccurrenceDate(string crondetailsstring, DateTime startDate, DateTime endDate)
{
try
{
if (!string.IsNullOrEmpty(crondetailsstring))
{
//var crontabCheck = CrontabSchedule.Parse(crondetailsstring);
//var nextDueTime = crontabCheck.GetNextOccurrence(startDate, endDate);
//var occurrences = crontabCheck.GetNextOccurrences(startDate, endDate);
CronExpression exp = new Quartz.CronExpression(crondetailsstring);
var nextFire = exp.GetNextValidTimeAfter(DateTime.Now);
//var quartzoccurrences = crontabCheck.GetNextOccurrences(startDate, endDate);
//Console.WriteLine(string.Join(Environment.NewLine, from t in quartzoccurrences
// select $"{t:ddd, dd MMM yyyy HH:mm}"));
// return nextDueTime;
return(nextFire?.UtcDateTime);
}
else
{
}
return(null);
}
catch (Exception ex)
{
throw ex;
}
}
private DateTime? UpdateNext(DateTime previous)
{
var exp = new CronExpression(txtCron.Text);
var next = exp.GetNextValidTimeAfter(previous.ToUniversalTime());
if (next.HasValue)
{
var dt = next.Value.DateTime.ToLocalTime();
lbFires.Items.Add(dt.ToString("MM/dd/yyyy hh:mm:ss tt"));
return dt;
}
return null;
}
private void CronNextForm_Load( object sender, EventArgs e )
{
if( !string.IsNullOrEmpty( cronString ) ) {
try {
CronExpression ce = new CronExpression( cronString );
DateTime dt = lastFinished.HasValue ? lastFinished.Value.ToUniversalTime() : DateTime.Now.ToUniversalTime();
for( int i = 0; i < 10; i++ ) {
DateTime? next = ce.GetNextValidTimeAfter( dt );
if( !next.HasValue ) {
break;
}
dt = next.Value;
listView1.Items.Add( dt.ToLocalTime().ToString( "yyyy-MM-dd HH:mm:ss" ) );
}
listView1.AutoResizeColumns( ColumnHeaderAutoResizeStyle.ColumnContent );
} catch {}
}
}
public void TestCronExpression()
{
//[秒] [分] [小时] [日] [月] [周] [年]
//实例化表达式类，把字符串转成一个对象
CronExpression expression = new CronExpression("0 15 10 * * ? 2012");
while (true)
{
DateTimeOffset utcNow = SystemTime.UtcNow();
Console.WriteLine("UtcNow - " + utcNow);
//Console.WriteLine("GetFinalFireTime - " + expression.GetFinalFireTime());这个方法没有实现
//得到给定时间下一个无效的时间
Console.WriteLine("GetNextInvalidTimeAfter - " + expression.GetNextInvalidTimeAfter(utcNow));
//得到给定时间的下一个有效的时间
Console.WriteLine("GetNextValidTimeAfter - " + expression.GetNextValidTimeAfter(utcNow));
//得到给定时间下一个符合表达式的时间
Console.WriteLine("GetTimeAfter - " + expression.GetTimeAfter(utcNow));
//Console.WriteLine("GetTimeBefore - " + expression.GetTimeBefore(utcNow));这个方法没有实现
//给定时间是否符合表达式
Console.WriteLine("IsSatisfiedBy - " + expression.IsSatisfiedBy(new DateTimeOffset(2012, 4, 6, 2, 15, 0, TimeSpan.Zero)));
Console.WriteLine(expression.TimeZone);
Console.WriteLine("------------------------------------");
Console.WriteLine(expression.GetExpressionSummary());
Console.Read();
}
}
private void UpdateNext()
{
//string snr = null;
if( !Configuration.IsServiceRunning() ) {
lblNextStart.ForeColor = Color.Red;
//if( !string.Equals( lblNextStart.Text, "Service is not running" ) ) {
// lblNextStart.ForeColor = Color.Red;
// //snr = "Service is not running";
//}
} else {
lblNextStart.ForeColor = SystemColors.ControlText;
}
try {
CronExpression ce = new CronExpression( job.CronConfig );
DateTime? next = ce.GetNextValidTimeAfter( job.LastFinished.HasValue ? job.LastFinished.Value.ToUniversalTime() : DateTime.Now.ToUniversalTime() );
if( next.HasValue ) {
string ts = next.Value.ToLocalTime().ToString( "yyyy:MM:dd HH:mm:ss" );
DateTime lt = next.Value.ToLocalTime();
if( DateTime.Now > lt ) {
next = ce.GetNextValidTimeAfter( DateTime.Now.ToUniversalTime() );
if( next.HasValue ) {
ts = next.Value.ToLocalTime().ToString( "yyyy:MM:dd HH:mm:ss" );
}
}
//if( snr != null ) {
// ts += " ({0})".FillBlanks( snr );
//}
lblNextStart.Text = ts;
}
} catch {
}
}
/// <summary>
///
/// </summary>
/// <param name="lastRun"></param>
/// <param name="cronString"></param>
/// <returns></returns>
private string GetNextRun( DateTime? lastRun, string cronString )
{
try {
CronExpression ce = new CronExpression( cronString );
DateTime dt = lastRun.HasValue ? lastRun.Value.ToUniversalTime() : DateTime.Now.ToUniversalTime();
if( DateTime.Now > dt ) {
dt = DateTime.Now.ToUniversalTime();
}
DateTime? next = ce.GetNextValidTimeAfter( dt );
return next.HasValue ? next.Value.ToLocalTime().ToString( "yyyy-MM-dd HH:mm:ss" ) : "Never";
} catch {
return "Never";
}
}