VISUAL C# EXERCISES▼
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Visual C# | LINQ with Entity Frameworks exercise | Return an anonymous type from LINQ to show event details
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.
- Go into SQL Server Management Studio;
- Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
- Execute this script.
This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).
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If you haven't already got one, create a Windows Forms project (using Visual C#, obviously) called wiseowl. Also if you haven't already done so, right-click in Solution Explorer and add an ADO.NET Entity Data Model based on the WorldEvents database (tick all of the tables).
Create a form called frmEventsList containing a datagridview, and get this to show a list of events when you load the form (but see notes below for how to do this):
You should use an anonymous type to return a list of events, as shown below. See below for more on how to proceed!
To get this to work, write a LINQ statement which selects rows from the tblEvent table in ascending date order, and from this return an anonymous type containing the following fields:
|What||The event name|
|When||The event date|
|Country||The country name from the tblCountry table|
|Category||The category name from the tblCategory table|
The entity model should include relationships brought in from the SQL Server database, so you shouldn't need to create any joins. To get the first 5 events, use Take.
When everything is working OK, you can close down your form!