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# | Using lists exercise | Create a list containing the first 10 square numbers
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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 frmSquares.cs in the above folder to import it into your project, then edit Program.cs to make this the default form.
The aim of this exercise is to make the following work:
When you click on the button, your code should create a list containing the first 10 squares, then display the items in this list in the listbox.
Help follows for how to do this on the next page!
To get this code to work, start by creating a list. Since the syntax is so hard to remember, here's a help:
How to create a list in C#.
As this shows, lists don't have to contain just bits of text: they can contain numbers, dates or anything else for that matter.
Now create a loop which goes from 1 to 10, adding the square of the number to the list for each iteration round the loop.
Finally, set the listbox's data source to be the list that you've created:
// show this list of squares
lstSquares.DataSource = squares;
That's it for this exercise!