Visual C# | Writing LINQ exercise | Iterate over star signs using LINQ, projecting into text

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.

Software ==> Visual C#  (79 exercises)
Version ==> Any version of C#
Topic ==> Writing LINQ  (2 exercises)
Level ==> Average difficulty
Subject ==> C# training
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.

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:

Star signs button

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:

List of summery star signs

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!

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.
This page has 0 threads Add post