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Multipurpose Digital Clock Control using .NET

, 20 Feb 2004
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A digital clock user control which can be used as a regular clock, stop watch or count down timer. Options include changing display color, freezing the clock and setting multiple alarms.


The Digital Clock Control is a versatile user control with options for:

  • Digital clock
  • Stop watch
  • Count down timer
  • Setting multiple alarms
  • Freezing the clock
  • Multiple color display
  • Resizable display

The digits can be displayed in three different colors - Red, Blue and Green.

The control adjusts the digits size with the size of the rectangle of the control. A ratio of 1:2 is maintained between the height and the width of the large digits and half the size for smaller ones. The clock control also supports 2 types of formats - 12 hour and 24 hour.

Using the Digital Clock control

Place the SriClocks.dll and Digital.bmp files in a single directory. At design time, right click in the ToolBox of Visual Studio, browse for and select SriClocks.dll file. The following image shows the control selected:

On pressing OK, the control is added to the ToolBox as shown below:

Now, drag and drop the control on to a form to create the Digital Clock control as any other user control.

Demo project - TestClock.exe

The demo project included shows all the capabilities and usage of the Clock control. Here is a screenshot.

Code to use the DigitalClockCtrl

To display a normal watch, which is also the default, just set the clock type to DigitalClock as shown below. Optionally, you may set the 24 hour or 12 hour format using ClockDisplayFormat of DigitalClockCtrl. The 12 hour format will display 'A' for AM and 'P' for PM. The default is the 12 hour format.

// set the clock type to DigitalClock
digitalClockCtrl.SetClockType = SriClocks.ClockType.DigitalClock;
// setting display to 24 hour format
digitalClockCtrl.ClockDisplayFormat = SriClocks.ClockFormat.TwelveHourFormat;

To use the countdown timer, create and add delegates to the clock control's CountDownDone event. Then set the clock type to CountDown. When the countdown is over, the clock control will fire the CountDownDone event.

// declare a callback method which implements the countdown 
// delegate declared in DigitalClockCtrl and add it to CountDownDone events
private void OnCountDownDone()
// Add the delegate method to CountDownDone events
// Whenever a countdown is over the clock control calls this delegate
digitalClockCtrl.CountDownDone += new DigitalClockCtrl.CountDown(OnCountDownDone);
// set the countdown time
digitalClockCtrl.CountDownTime = ms; // ms - milliseconds
digitalClockCtrl.SetClockType = SriClocks.ClockType.CountDown;

To start the stop watch, set the clock type to ClockType.StopWatch.

// Start the stop watch
digitalClockCtrl.SetClockType = SriClocks.ClockType.StopWatch;

To freeze the clock display, set the clock type to ClockType.Freeze. This will freeze the clock till the clock type is reset to DigitalClock, CountDown or StopWatch. The functionality is particularly useful when using the stopwatch.

// to freeze the clock display
digitalClockCtrl.SetClockType = SriClocks.ClockType.Freeze;

To change the display color, set the SetDigitalColor property of the control to one of the DigitalColor enumerations.

// setting the digits color to GreenColor
digitalClockCtrl1.SetDigitalColor = SriClocks.DigitalColor.GreenColor;

To set alarms, create delegates and add them to RaiseAlarm event of the clock control. When an alarm is raised by the control, it fires the RaiseAlarm events.

// Create the Alarm delegates
public void OnRaiseAlarm()
// add the delegate to the RaiseAlarm event
digitalClockCtrl.RaiseAlarm += new DigitalClockCtrl.Alarm(OnRaiseAlarm);
// set the alarm which accepts values as System.DateTime structure.
// DateTime.Parse is used here to parse the input text from user
// When the alarm is raised by the control
// the OnRaiseAlarm method declared above is called
digitalClockCtrl.AlarmTime = DateTime.Parse(Alarmtime.Text);


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Sriram Chitturi
United States United States
No Biography provided

Comments and Discussions

GeneralLove it!!! Pinmemberraananv13-Mar-12 1:59 
QuestionStopWatch PinmemberMr Apprentice13-Mar-12 0:11 
QuestionAwesome job PinmemberMister Horse11-Nov-11 12:22 
QuestionGreat Job Pinmembercarterlist1-Oct-11 2:09 
QuestionHow to use this in a Form Created Using Expression Blend Pinmemberewics13-Aug-11 2:34 
GeneralGeneric GDI+ error Pinmembersecurigy22-Aug-10 5:59 
GeneralRe: Generic GDI+ error PinmemberMember 461314621-Aug-11 19:29 
GeneralMore colors for digits? [modified] PinmemberThe Mighty Atom27-May-10 7:47 
QuestionMany Instants Not Working.... PinmemberASysSolvers10-Oct-09 8:41 
I am going to show time of 5 contries in one page. I drag and drop 5 controld and gave the all properties for each like colot; hour format, datetime but when i run code it shows one clock running all the time others r freezed. i have not freeze value even.
If you plase tell me where should i check it would be greatful.
Thankz ur corperation is appriciated!
Questionwhy use 111 for A char ? Pinmemberfiras_maher2-Sep-09 20:47 
QuestionCompact Framework? PinmemberPengie4-Dec-08 15:22 
QuestionAlarm Set help Pinmemberjackchow13-Nov-08 15:19 
Questionvb 2005? Pinmembergaryjohn_20006-Sep-07 12:56 
QuestionStart time of Stopwatch Pinmemberfightclub77717-Jul-07 20:56 
QuestionLicense? PinmemberKcodeProj5-Jul-07 6:54 
AnswerRe: License? PinmemberSriram Chitturi5-Jul-07 7:02 
GeneralRe: License? PinmemberKcodeProj5-Jul-07 23:45 
GeneralClock Control Freeze Vales PinmemberMark Gales30-Jun-07 13:38 
GeneralCountdown Timer PinmemberBrizee17-May-07 0:05 
GeneralRe: Countdown Timer PinmemberSriram Chitturi17-May-07 10:52 
QuestionClock for VB.NET - aspx? PinmemberTmuld15-Mar-07 9:13 
AnswerRe: Clock for VB.NET - aspx? PinmemberSriram Chitturi17-May-07 10:55 
QuestionNewbie Trouble importing DigitalClock Control to VS 2005 Pinmemberstabarinde17-Jan-07 12:09 
Questionmultiple clocks Pinmemberlnae26-Sep-06 3:14 
AnswerRe: multiple clocks Pinmemberskst31-Oct-06 6:44 
GeneralRe: multiple clocks PinmemberChristopherZ12-Jun-10 18:46 
GeneralClock disabled Pinmemberjackieflan12-May-06 3:07 
GeneralSetting the time Pinmemberbighoss18-Apr-06 13:12 
QuestionIf i want to get the time shown on the your Control , what should i do? PinmemberYour details have been updated6-Sep-05 19:34 
GeneralGMT PinmemberLee Becham8-Jul-05 10:54 
GeneralUsing two clocks at the same time Pinmembercarlotino3-Jun-05 13:50 
GeneralRe: Using two clocks at the same time Pinmemberlnae14-Oct-06 22:38 
GeneralProblem with Digital.bmp Pinmembercarlotino13-May-05 12:07 
GeneralRe: Problem with Digital.bmp PinmemberSriram Chitturi14-May-05 3:19 
GeneralRe: Problem with Digital.bmp PinmemberVinceHolmes28-Nov-05 6:49 
GeneralRe: Problem with Digital.bmp Pinmemberpinturic6-Dec-05 0:17 
GeneralRe: Problem with Digital.bmp Pinmemberpinturic6-Dec-05 0:27 
JokeRe: Problem with Digital.bmp PinmemberLillebrorDE23-Jan-06 2:33 
GeneralRe: Problem with Digital.bmp PinmemberJuba27-Dec-06 5:23 
GeneralPartially strange behavior Pinmemberloizzi22-Apr-05 6:13 
QuestionCountDownDone...How to set Clocktime to 00:00:00? Pinmemberanarcho30-Nov-04 12:50 
GeneralSaved me some time PinmemberTony D. Abel4-Nov-04 10:51 
GeneralSolid Functional Building Block PinmemberFlashMerlot22-Oct-04 5:05 
GeneralNot revolutionary... PinmemberRobert Rohde16-Feb-04 0:09 
GeneralRe: Not revolutionary... PinmemberSriram Chitturi16-Feb-04 3:54 

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