.Net Essentials: Linq For Databases Online Courses

.Net Essentials: Linq For Databases Online Courses

Databases are at the heart of modern application development, and .Net is a powerful tool for working with them. In this article, we will introduce Linq, a powerful query language for databases that you can use in your code. We will then provide an online course that will teach you all about Linq, including how to use it to work with databases. So whether you’re a beginner or an experienced developer, read on to learn more about what Linq can do for you.

What is Linq?

Linq is a powerful language that enables you to query data in your applications. It is used extensively in the .Net platform, and is a key part of the LINQ to SQL library.

With Linq, you can easily access data from databases, web services, and other sources. You can also use it to filter and sort data.

To get started with Linq, check out the following tutorials:

Querying Data with Linq

What is LINQ?

LINQ is a programming language extension that allows you to query data with your code. You can use it to get specific data, or data from a certain place in your data set. You can also filter the results to make them more manageable.

Manipulating Data with Linq

In this post we will be looking at how to manipulate data using the Linq extension for .NET. We will first create a simple LINQ query to retrieve all the cars in a certain location. Next, we will use the Select() method to select only the Make and Model of cars that are registered in Maine. Finally, we will print out a list of all the cars in our dataset.

To begin, let’s create a new console application called “LinqDemo” and add a reference to System.Linq.dll. Next, create a class called Car that has two public properties: Make and Model. Below is an example of what our Car class might look like:

using System; using System.Linq; public class Car { public int Make { get; set; } public string Model { get; set; } }

Now let’s create a simple LINQ query to retrieve all the cars in Boston. To do this, we’ll use the following code:

var cars = from car in db.CarList where car.Location == “Boston” select car;

Once our LINQ query has been created, we can access its results by typing Cars into the console window. The results should look something like this:

Next, let’s use LINQ to select only the make and model of cars that are registered in Maine. To do this, we’ll modify our previous code so that it looks like

Working with Databases using LINQ

If you want to work with databases using LINQ, then you need to take a course like the ones offered online by .Net Academy. In this article, we’ll show you how to use LINQ to query a database.

To start, create a new console application and name it LinqToDatabase. Enter the following code into the Main() method:

static void Main(string[] args) { // create an instance of the DBEngine object var db = new DBEngine(); // open a connection to the database and get its connection string db.Open(“server=.;database=linqtodatabase;”); // execute a LINQ query against the database var products = from p in db.Products where p.Category == “Appliances” select p; for each (var product in products) Console.WriteLine(product); }

In this code, we’re issuing a LINQ query against our database and returning all of the products in that database. Once we’ve executed our query, we can see what results have been returned by running the for each statement against our collection of products:

Appliances ————– Dishwashers ————- Fridge/Freezer ———— Microwave Ovens ————- Refrigerators ————–

Databases are key to any business, and understanding how they work is essential if you want to develop efficient applications. In this article, I’ll be discussing one of the most important .Net features: LINQ (Language Integrated Query). By learning how to use LINQ, you’ll be able to query data sources in a variety of ways and build powerful applications that can handle large amounts of data. So if you’re looking for an online course that will teach you all about .Net databases, then look no further!

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