In this article I will explain with an example, how to delete data from MySQL database with Stored Procedure in ASP.Net Core MVC.
Note: For beginners in ASP.Net Core 7, please refer my article ASP.Net Core 7: Hello World Tutorial with Sample Program example.
 
 

Database

I have made use of the following table Customers with the schema as follows.
Delete data from MySQL Database with Stored Procedure in ASP.Net Core
 
I have already inserted few records in the table.
Delete data from MySQL Database with Stored Procedure in ASP.Net Core
 
Note: You can download the database table SQL by clicking the download link below.
          Download SQL file
 
 

Stored Procedure

The following Stored Procedure will be used to Delete data from the MySQL database table.
This Stored Procedure accepts CustomerId parameter, which is used to DELETE the records in Customers Table.
DELIMITER //
CREATE PROCEDURE Customers_DeleteCustomer(
    IN CustomerId INT
)
BEGIN
    DELETE FROM Customers
    WHERE Customers.CustomerId = CustomerId;
END//
DELIMITER ;
 
 

Model

The Model class consists of following property.
public class CustomerModel
{
    public int CustomerId { get; set; }
}
 
 

Namespaces

You will need to import the following namespace.
using System.Data;
using MySql.Data.MySqlClient;
 
 

Controller

The Controller consists of following Action methods.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
 

Action method for handling POST operation

This method accepts CustomerModel class object as a parameter.
Inside this Action method, first the connection is read from the ConnectionStrings section of the AppSettings.json file.
Note: For more details on how to read Connection String from AppSettings.json, please refer my article .Net Core 7: Read Connection String from AppSettings.json file.
 
The CustomerId value is fetched form their respective TextBox using CustomerModel class object and passed as parameter to MySqlCommand class object.
Then, the ExecuteNonQuery function is executed and the record is deleted from the MySQL database using Stored Procedure.
Note: For more details on how to use ExecuteNonQuery method, please refer my article Understanding MySqlCommand ExecuteNonQuery in C# and VB.Net.
 
Finally, based on whether the record is deleted or not an appropriate message is set into ViewBag object and View is returned.
public class HomeController : Controller
{
    public IConfiguration Configuration { get; set; }
 
    public HomeController(IConfiguration _configuration)
    {
        this.Configuration = _configuration;
    }
 
    public IActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public IActionResult Index(CustomerModel customer)
    {
        string spName = "Customers_DeleteCustomer";
        string constr = this.Configuration.GetSection("ConnectionStrings")["MyConn"];
        using (MySqlConnection con = new MySqlConnection(constr))
        {
            using (MySqlCommand cmd = new MySqlCommand(spName, con))
            {
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@CustomerId", customer.CustomerId);
                con.Open();
                int i = cmd.ExecuteNonQuery();
                con.Close();
                if (i > 0)
                {
                    ViewBag.Message = "Customer record deleted.";
                }
                else
                {
                    ViewBag.Message = "Customer not found.";
                }
            }
        }
        return View();
    }
}
 
 

View

HTML Markup

Inside the View, in the very first line the CustomerModel class is declared as Model for the View.
The View consists of an HTML Form which has been created using the following TagHelpers attributes.
asp-action – Name of the Action. In this case the name is Index.
asp-controller – Name of the Controller. In this case the name is Home.
method – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
The View also consists of an HTML Table, which consists of a TextBox and a Submit Button.
 

Submitting the Form

When the Delete Button is clicked then, the ViewBag object is checked for NULL and if it is not NULL then, the value of the ViewBag object is displayed using JavaScript Alert Message Box.
@model Delete_SP_MySQL_Core.Models.CustomerModel
@addTagHelper*, Microsoft.AspNetCore.Mvc.TagHelpers
@{
      Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <form method="post" asp-controller="Home" asp-action="Index">
        <table cellpadding="1" cellspacing="1">
            <tr>
                <td style="width: 60px">
                    Id<br />
                    <input type="text" asp-for="CustomerId" style="width:25px;" />
                </td>
                <td style="width: 200px">
                    <br />
                   <input type="submit" value="Delete" />
                </td>
            </tr>
       </table>
       @if (ViewBag.Message != null)
       {
            <script type="text/javascript">
                window.onload = function () {
                    alert("@ViewBag.Message");
                };
            </script>
        }
    </form>
</body>
</html>
 
 

Screenshot

Delete data from MySQL Database with Stored Procedure in ASP.Net Core
 
 

Downloads

Download Code