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Software ==>	Visual C# (55 exercises)
Topic ==>	Conditions (2 exercises)
Level ==>	Relatively easy
Subject ==>	C# training

Use C# if conditions to check a user has filled in a form

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

Before you can do this exercise, you'll need to download and unzip this file .

To avoid having to draw the form needed for this exercise, right-click on the name of your project in Solution Explorer then choose Add --> Existing Item... (you can also press SHIFT + ALT + A to do the same thing).

Choose only the file called frmPreference.cs in the above folder to import it into your project, then edit Program.cs to make this the default form (you may need to overwrite any existing files with the same name). When you run your application, you should now see this:

Preferences form

You must choose options for the two combo boxes before continuing.

Attach code to the OK button so that you see one of the following two messages if you leave either of the combo boxes blank:

Two error messages

To check if a combo box has a value, see if the length of its Text property is greater than 0.

If both combo boxes are filled in, display a suitable confirmation message:

Final message

Wise Owls can't afford to be fussy ...

Close down any forms that you've left open!

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.

You can find other training resources for the subject of this exercise here:

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