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 (2)
- The form as a class (1)
- Data structures (4)
- Inheritance (4)
- Interfaces (2)
- Delegates and events (2)
- Writing LINQ (1)
- Advanced LINQ (3)
- LINQ to SQL models (1)
- Writing LINQ to SQL (2)
- Grouping using LINQ (2)
Visual C# | Conditions exercise | Validation the choices made on a dating agency form
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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:
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:
|If the first one is blank ...||If the second one is blank ...|
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:
Wise Owls can't afford to be fussy ...
Close down any forms that you've left open!