Stephens' C# Programming with Visual Studio® 2010 24-Hour Trainer

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LESSON 15 Working With Dates anD times

Normally the TimeSpan’s ToString method displays a value in the format d.hh:mm:ss.fffffff.

In this example, you use

string.Format to display the elapsed time in the format hh:mm:ss.ff.

You can download the code and resources for this Try It from the book’s web

page at

www.wrox.com or www.CSharpHelper.com/24hour.html. You can find

them within the Lesson15 folder.

Lesson Requirements

Create the form shown in Figure 15-1. In addition to the controls that are visible, give the

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form a Timer with Interval = 1. Initially disable the Stop button.

When the user clicks the Start button, start the

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Timer, disable the Start button, and enable

the Stop button.

When the user clicks the Stop button, stop the

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Timer, enable the Start button, and disable the

Stop button.

When the

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Timer’s Tick event fires, display the elapsed time in the format hh:mm:ss.ff.

Hints

TimeSpan

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doesn’t use the same formatting characters as a DateTime, so for example, you

can’t simply use a format string such as

hh:mm:ss.ff. Instead use the TimeSpan properties

to get the elapsed hours, minutes, seconds, and milliseconds and then format those values.

Step-by-Step

Create the form shown in Figure 15-1. In addition to the controls that are visible, give the

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form a Timer with Interval = 1. Initially disable the Stop button.

1. Add the Start and Stop buttons and a Label to the form ...