Visual C# | Validating forms exercise | ErrorProvider controls to check age filled in

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.

You can learn how to do this exercise on the relevant Wise Owl classroom training course (sadly for the moment only in the UK).

Software ==> Visual C#  (79 exercises)
Version ==>
Topic ==> Validating forms  (6 exercises)
Level ==> Average difficulty
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

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Add the form in the above folder to your application, or work with a copy of this form that you have already imported or created.

Add an ErrorProvider control to your form.

Attach code to the Validating event of each of the two text boxes so that:

  • if the length of the name is zero, you show an error next to it
  • if the age isn't an integer, you show an error next to it

Test out your validation:

Visual C Sharp 2005 exercise - Validating forms (image 1)

This shows that you need to be careful when displaying errors next to textbox controls in panels

Check that your application works, then close down its forms.

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