A Clock User Control for your Windows Form in C#

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A Clock User Control for your Windows Form in C#(mycsharpcorner.com)

submitted by yousefla(675) 5 years, 1 month ago

Making your own Clock control to display on your Windows Form to display and update the current time up to the second is an easy deal using C# Timers. Creating The Clock User Control Step By Step Here is one way to do it:

1 comment |category: C# |Views: 479
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posted by yesthatmcgurk(4063) 5 years, 1 month ago 0

Wow. Ten times a second this control will get the current time and convert it to a long time string. TEN TIMES A SECOND. Ten times a second DateTime.Now() will create a new... no, make that a minimum of three and a maximum of five (and maybe more) DateTime objects, a TimeSpan object, and numerous others in a call stack at least six levels deep, all to do what one DateTime object could be used to do, only once a second. Wow.

A better solution would be to use static timer and DateTime objects. Upon init, set the timer to an interval of 1000 ms. Upon the first firing of the tick event (_currentTime == null) set the var to DateTime.Now (_currentTime = DateTime.Now). Read out the current time. Upon every other tick event, increment _currentTime one second and then update the display. It won't be exact, but it'll be damn close and a whole lot less wasteful of resources.
Other cheap improvements: Give your callers the ability to set the interval (show seconds? minutes? hours? days?). Use another timer to sync _currentTime to DateTime.Now every hour. Stuff like this makes your code much less offensive and adds value with little effort.

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