Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

DateTime Constructor (Int64)

Updated: September 2010

Initializes a new instance of the DateTime structure to a specified number of ticks.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
public DateTime(
	long ticks


Type: System.Int64
A date and time expressed in the number of 100-nanosecond intervals that have elapsed since January 1, 0001 at 00:00:00.000 in the Gregorian calendar.

ticks is less than DateTime.MinValue or greater than DateTime.MaxValue.

The Kind property is initialized to Unspecified.

For applications in which a limited degree of time zone awareness is important, you can use the corresponding DateTimeOffset constructor.

The following example demonstrates one of the DateTime constructors.

// This example demonstrates the DateTime(Int64) constructor.
using System;
using System.Globalization;

class Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      // Instead of using the implicit, default "G" date and time format string, we 
      // use a custom format string that aligns the results and inserts leading zeroes.
      string format = "{0}) The {1} date and time is {2:MM/dd/yyyy hh:mm:ss tt}";

      // Create a DateTime for the maximum date and time using ticks.
      DateTime dt1 = new DateTime(DateTime.MaxValue.Ticks);

      // Create a DateTime for the minimum date and time using ticks.
      DateTime dt2 = new DateTime(DateTime.MinValue.Ticks);

      // Create a custom DateTime for 7/28/1979 at 10:35:05 PM using a 
      // calendar based on the "en-US" culture, and ticks. 
      long ticks = new DateTime(1979, 07, 28, 22, 35, 5,
     new CultureInfo("en-US").Calendar).Ticks;
      DateTime dt3 = new DateTime(ticks);

      outputBlock.Text += String.Format(format, 1, "maximum", dt1) + "\n";
      outputBlock.Text += String.Format(format, 2, "minimum", dt2) + "\n";
      outputBlock.Text += String.Format(format, 3, "custom ", dt3) + "\n";
      outputBlock.Text += String.Format("\nThe custom date and time is created from {0:N0} ticks.", ticks) + "\n";
This example produces the following results:

1) The maximum date and time is 12/31/9999 11:59:59 PM
2) The minimum date and time is 01/01/0001 12:00:00 AM
3) The custom  date and time is 07/28/1979 10:35:05 PM

The custom date and time is created from 624,376,461,050,000,000 ticks.



Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.




September 2010

Expanded the ticks parameter description.

Customer feedback.

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2014 Microsoft. All rights reserved.