Visual C# | LINQ with Entity Frameworks exercise | List world events using LINQ and EF, with most recent first

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.

The answer to the exercise will be included and explained if you attend the course listed below!

Software ==> Visual C#  (79 exercises)
Version ==> Any version of C#
Topic ==> LINQ with Entity Frameworks  (4 exercises)
Level ==> Relatively easy
Course ==> Intermediate C#
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). Once you've done this:
  1. Go into SQL Server Management Studio;
  2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
  3. 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.  For simplicity, it's probably easiest to choose EF 5.0 and select all of the tables in the database:

EF 6.0 would require you to add a NuGet package. Tick all of the tables.

A quick reminder before turning the page - the syntax of LINQ is as follows:

// create data context

var DataContextVariableName =

new EntityModelName();

// simple LINQ statemnt

var IEnumerableVariableName = (

from AnotherVariableName in

DataContextVariableName.TableName

select EntityModelName

);

// set this to be data source of data grid view

dgvEvents.DataSource =

IEnumerableVariableName.ToList();

Create a new form called frmEventsList containing a datagridview, and use LINQ to set it so that when the form loads you see a list of events (with the most recent first):

List of events

What the form might show.

Test this works, then close all your Visual Studio windows.

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