In this article I will explain with an example, how to use ADO.Net in ASP Net Core (.Net Core 8) MVC.
Note: For beginners in ASP.Net Core (.Net Core 8) MVC, please refer my article ASP.Net Core 8: Hello World Tutorial with Sample Program example: Hello World Tutorial with Sample Program example.
 
 

Installing System.Data.SqlClient package

By default like ASP.Net, ASP.Net MVC and .Net Core 3.0, System.Data.SqlClient package is not available in ASP Net Core (.Net Core 8) MVC.
Thus, in order to use System.Data.SqlClient package, you need to install the System.Data.SqlClient package from Nuget using Package Manager Console.
Note: For more details on how to install System.Data.SqlClient package in ASP Net Core (.Net Core 8) MVC, please refer my Using System.Data.SqlClient package in .Net Core 8.0.
 
 

Database

I have made use of the following table Customers with the schema as follows.
Using ADO.Net in .Net Core 8.0
 
I have already inserted few records in the table.
Using ADO.Net in .Net Core 8.0
 
Note: You can download the database table SQL by clicking the download link below.
            Download SQL file
 
 

Namespaces

You will need to import the following namespaces.
using System.Data;
using System.Data.SqlClient;
 
 

Controller

The Controller consists of the following Action methods.

Action method for handling GET operation

Inside this Action method, the records are fetched from the Customers Table using ADO.Net.
Then, the records are inserted into a DataSet using Fill method of the SqlDataAdapter class object.
Finally, the DataSet is returned to the View.
public class HomeController : Controller
{
    public IActionResult Index()
    {
        string constr = @"Data Source=.\SQL2019;Initial Catalog= AjaxSamples;integrated security=true";
        string sql = "SELECT CustomerId, Name, Country FROM Customers";
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(sql, con))
            {
                using (DataSet ds = new DataSet())
                {
                    sda.Fill(ds);
                    return View(ds);
                }
            }
        }
    }
}
 
 

View

HTML Markup

Inside the View, the System.Data namespace is inherited.
For displaying the records, an HTML Table is used. A FOR EACH loop will be executed over the rows of the DataTable which will generate the HTML Table rows with the Customer records.
@using System.Data;
@{
    Layout =  null;
}
 
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <table cellpadding="0" cellspacing="0">
        <tr>
            <th>CustomerId</th>
            <th>Name</th>
            <th>Country</th>
        </tr>
        @foreach (DataRow  row in Model.Tables[0].Rows)
        {
            <tr>
                <td>@row["CustomerId"]</td>
                <td>@row["Name"]</td>
                <td>@row["Country"]</td>
            </tr>
        }
    </table>
</body>
</html>
 
 

Screenshot

Using ADO.Net in .Net Core 8.0
 
 

Downloads

ADO.Net_Core_8.zip