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Cron Expression Descriptor

A .NET library that converts cron expressions into human readable strings.

Author: Brady Holt (http://www.geekytidbits.com)
Contributors: Renato Lima, Ivan Santos, Fabien Brooke, Siarhei Khalipski, Mustafa SADEDİL, TotalMace, Star Peng, LbISS, Arnaud TAMAILLON, Michael Schuler
License: MIT

Features

  • Supports all cron expression special characters including * / , - ? L W, #
  • Supports 5, 6 (w/ seconds or year), or 7 (w/ seconds and year) part cron expressions
  • Provides casing options (Sentence, Title, Lower, etc.)
  • Localization with support for 10 languages

Languages Available

Download

Cron Expression Descriptor releases can be installed with NuGet. Visit the NuGet Package page for more info.

View Releases for release version history.

Usage Examples (as Unit Tests)

Assert.AreEqual("Every minute", ExpressionDescriptor.GetDescription("* * * * *"));
Assert.AreEqual("Every minute", ExpressionDescriptor.GetDescription("*/1 * * * *"));
Assert.AreEqual("Every minute", ExpressionDescriptor.GetDescription("0 0/1 * * * ?"));
Assert.AreEqual("Every hour", ExpressionDescriptor.GetDescription("0 0 * * * ?"));
Assert.AreEqual("Every hour", ExpressionDescriptor.GetDescription("0 0 0/1 * * ?"));
Assert.AreEqual("At 11:00 PM, Monday through Friday", ExpressionDescriptor.GetDescription("0 23 ? * MON-FRI"));
Assert.AreEqual("Every second", ExpressionDescriptor.GetDescription("* * * * * *"));
Assert.AreEqual("Every 45 seconds", ExpressionDescriptor.GetDescription("*/45 * * * * *"));
Assert.AreEqual("Every 05 minutes", ExpressionDescriptor.GetDescription("*/5 * * * *"));
Assert.AreEqual("Every 10 minutes", ExpressionDescriptor.GetDescription("0 0/10 * * * ?"));
Assert.AreEqual("Every 05 minutes", ExpressionDescriptor.GetDescription("0 */5 * * * *"));
Assert.AreEqual("At 11:30 AM, Monday through Friday", ExpressionDescriptor.GetDescription("30 11 * * 1-5"));
Assert.AreEqual("At 11:30 AM", ExpressionDescriptor.GetDescription("30 11 * * *"));
Assert.AreEqual("Every minute between 11:00 AM and 11:10 AM", ExpressionDescriptor.GetDescription("0-10 11 * * *"));
Assert.AreEqual("Every minute, only in March", ExpressionDescriptor.GetDescription("* * * 3 *"));
Assert.AreEqual("Every minute, only in March and June", ExpressionDescriptor.GetDescription("* * * 3,6 *"));
Assert.AreEqual("At 02:30 PM and 04:30 PM", ExpressionDescriptor.GetDescription("30 14,16 * * *"));
Assert.AreEqual("At 06:30 AM, 02:30 PM and 04:30 PM", ExpressionDescriptor.GetDescription("30 6,14,16 * * *"));
Assert.AreEqual("At 09:46 AM, only on Monday", ExpressionDescriptor.GetDescription("46 9 * * 1"));
Assert.AreEqual("At 12:23 PM, on day 15 of the month", ExpressionDescriptor.GetDescription("23 12 15 * *"));
Assert.AreEqual("At 12:23 PM, only in January", ExpressionDescriptor.GetDescription("23 12 * JAN *"));
Assert.AreEqual("At 12:23 PM, only in January", ExpressionDescriptor.GetDescription("23 12 ? JAN *"));
Assert.AreEqual("At 12:23 PM, January through February", ExpressionDescriptor.GetDescription("23 12 * JAN-FEB *"));
Assert.AreEqual("At 12:23 PM, January through March", ExpressionDescriptor.GetDescription("23 12 * JAN-MAR *"));
Assert.AreEqual("At 12:23 PM, only on Sunday", ExpressionDescriptor.GetDescription("23 12 * * SUN"));
Assert.AreEqual("Every 05 minutes, at 03:00 PM, Monday through Friday", ExpressionDescriptor.GetDescription("*/5 15 * * MON-FRI"));
Assert.AreEqual("Every minute, on the third Monday of the month", ExpressionDescriptor.GetDescription("* * * * MON#3"));
Assert.AreEqual("Every minute, on the last Thursday of the month", ExpressionDescriptor.GetDescription("* * * * 4L"));
Assert.AreEqual("Every 05 minutes, on the last day of the month, only in January", ExpressionDescriptor.GetDescription("*/5 * L JAN *"));
Assert.AreEqual("At 02:02:30 PM", ExpressionDescriptor.GetDescription("30 02 14 * * *"));
Assert.AreEqual("Seconds 05 through 10 past the minute", ExpressionDescriptor.GetDescription("5-10 * * * * *"));
Assert.AreEqual("Seconds 05 through 10 past the minute, minutes 30 through 35 past the hour, between 10:00 AM and 12:00 PM", ExpressionDescriptor.GetDescription("5-10 30-35 10-12 * * *"));
Assert.AreEqual("At 30 seconds past the minute, every 05 minutes", ExpressionDescriptor.GetDescription("30 */5 * * * *"));
Assert.AreEqual("At 30 minutes past the hour, between 10:00 AM and 01:00 PM, only on Wednesday and Friday", ExpressionDescriptor.GetDescription("0 30 10-13 ? * WED,FRI"));
Assert.AreEqual("At 10 seconds past the minute, every 05 minutes", ExpressionDescriptor.GetDescription("10 0/5 * * * ?"));
Assert.AreEqual("Every 03 minutes, minutes 02 through 59 past the hour, at 01:00 AM, 09:00 AM, and 10:00 PM, between day 11 and 26 of the month, January through June", ExpressionDescriptor.GetDescription("2-59/3 1,9,22 11-26 1-6 ?"));
Assert.AreEqual("At 06:00 AM", ExpressionDescriptor.GetDescription("0 0 6 1/1 * ?"));
Assert.AreEqual("At 05 minutes past the hour", ExpressionDescriptor.GetDescription("0 5 0/1 * * ?"));
Assert.AreEqual("Every second, only in 2013", ExpressionDescriptor.GetDescription("* * * * * * 2013"));
Assert.AreEqual("Every minute, only in 2013", ExpressionDescriptor.GetDescription("* * * * * 2013"));
Assert.AreEqual("Every minute, only in 2013 and 2014", ExpressionDescriptor.GetDescription("* * * * * 2013,2014"));
Assert.AreEqual("At 12:23 PM, January through February, 2013 through 2014", ExpressionDescriptor.GetDescription("23 12 * JAN-FEB * 2013-2014"));
Assert.AreEqual("At 12:23 PM, January through March, 2013 through 2015", ExpressionDescriptor.GetDescription("23 12 * JAN-MAR * 2013-2015"));