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# | Writing LINQ exercise | Iterate over star signs using LINQ, projecting into text
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If you haven't already got one, create a Windows Forms project (using Visual C#, obviously) called wiseowl.
Right-click on your project in Solution Explorer to add an existing item, and choose the class file StarSign.cs in the above folder.
Right-click again on your project in Solution Explorer to add an existing item, and this time choose the file frmStarSigns.cs in the above folder. Make this the default form in Program.cs.
When you run your project and click on the button, you should see this:
The aim of this exercise is to get this button to list out all of the summer star signs.
The code attached to the button creates a list of objects of type StarSign. Your task is to change this to use a LINQ query expression to iterate over the items in this list, transforming the results into an enumerable collection of strings giving the names of the summer star signs.
Summer is defined as when the start month of the star sign is in May, June, July or August.
When you run your revised code, you should see something like this:
What you should see now when you click on the button.
End your application. If you have spare time, you could fill in the name of the star sign that everyone forgets!