WISE OWL EXERCISES
VISUAL C# EXERCISES
- Creating forms (4)
- Coding form events (1)
- Laying out your code (2)
- C# variables (4)
- Enumerations and constants (2)
- Conditions (2)
- Modular code (3)
- Arrays (2)
- Looping (2)
- Files and folders (3)
- Properties in C# (3)
- Using lists (3)
- Validating forms (6)
- Toolbars, menus and status bars (1)
- FileDialogs and StreamReaders (1)
- Debugging and trapping errors (1)
- Introduction to DataGridViews (1)
- DataGridView events (3)
- Complex DataGridViews (2)
- Creating classes (4)
- The form as a class (1)
- Data structures (6)
- Inheritance (5)
- Interfaces (2)
- Delegates and events (2)
- Writing LINQ (2)
- Advanced LINQ (2)
- Entity Frameworks (1)
- LINQ with Entity Frameworks (4)
- Grouping using LINQ (2)
- LINQ to SQL (2)
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.
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).
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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:
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.