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

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The answer to the exercise will be included and explained if you attend the relevant Wise Owl course (sadly, only in the UK for now).

Software ==> Visual C#  (79 exercises)
Version ==>
Topic ==> Validating forms  (6 exercises)
Level ==> Average difficulty
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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.

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