Connecting to Oracle 11g Database With Asp.Net Core 6, Entity Framework, and C#

The goal of this article is to help you build a C# Asp.Net Core 6 application that can connect to an oracle backend database, enabling you to create and run CRUD operations against the data in the database.

Introduction

Oracle databases are one of the most popular databases in the world. They are used by businesses of all sizes, from small businesses to large enterprises. Oracle databases are known for their reliability and performance.

Asp.Net Core is a Microsoft framework that can be used to build web applications and services. Entity Framework is a data access technology that can be used with Asp.Net Core to connect to Oracle databases.

In this article, we will show you how to connect to an Oracle database using Asp.Net Core, Entity Framework, and C#. We will also show you how to execute some basic SQL queries.

Create A New Project With Asp.Net Core 6 Using Entity Framework

Creating a new project with ASP.NET Core 6 and Entity Framework is easy. You can use the "dotnet new" command to create a new project template.

Once you have created the project, you need to add the necessary dependencies. For this tutorial, you will need to add the following dependencies:

Microsoft.EntityFrameworkCore.Oracle

Npgsql.EntityFrameworkCore.PostgreSQL

These dependencies will allow you to connect to an Oracle database and a PostgreSQL database using Entity Framework Core.

Once you have added the dependencies, you need to configure the connection strings for your databases. In the appsettings.json file, add the following connection strings:

"OracleConnection": "Server=localhost;Port=1521;Database=orcl;User Id=system;Password=password;"

"PostgresConnection": "Server=localhost;Port=5432;Database=postgres;User Id=postgres;Password=password;"

You can now start writing your code!

Connect to Oracle Database on Windows

There are a few different ways to connect to an Oracle database on Windows. One way is to use the Oracle .NET driver. This driver can be downloaded from the Oracle website and installed on your machine. Once you have installed the driver, you will need to add it to your project in Visual Studio. To do this, open your project in Visual Studio and go to the “References” folder. Right-click on the “References” folder and select “Add Reference…”. In the “Add Reference” dialog, click on the “Browse” tab and navigate to the location of the Oracle .NET driver on your machine. Select the driver and click “OK”.

Another way to connect to an Oracle database on Windows is to use the Microsoft ODBC Driver for Oracle. This driver can be downloaded from the Microsoft website. Once you have downloaded and installed the driver, you will need to create an ODBC data source for your Oracle database. To do this, open the “ODBC Data Sources” dialog (you can find this in the Control Panel). Click on the “Add” button and select “Oracle Database”

Data Operations In The Database (Insert, Update, Delete)

When working with databases, it is often necessary to perform data operations such as inserting, updating, and deleting data. These operations can be performed using the Asp.Net Core and Entity Framework.

To insert data into a database using Asp.Net Core and Entity Framework, the following code can be used:

using (var context = new MyContext()) {

    var entity = new MyEntity();

    // Set values for entity properties here

    context.MyEntities.Add(entity);

    context.SaveChanges();

}

This code will insert a new record into the database table that corresponds to the MyEntity class. The values for the entity's properties will need to be set before adding it to the context. After adding the entity to the context, the SaveChanges method must be called in order to actually insert the data into the database.

Updating data in a database is similar to inserting data. The following code can be used to update an existing record:

using (var context = new MyContext()) {

    var entity = context.MyEntities.FirstOr

Conclusion

If you're working with Oracle databases in ASP.NET Core and Entity Framework, this article has shown you how to connect to the database and run queries using C#. You've also seen how to use LINQ to query data from the database. By following the steps in this article, you should be able to get started working with Oracle databases in no time.