In this article I will explain with an example, how to Delete data from SQL Server database using ADO.Net in ASP.Net MVC.
Note: If you want to learn how to insert data into database, please refer my article ASP.Net MVC Razor: Create Form and Insert data into Database.
 
 
Database
I have made use of the following table Customers with the schema as follows.
Delete data into Database in ASP.Net MVC
 
I have already inserted few records in the table.
Delete data into Database in ASP.Net MVC
 
Note: You can download the database table SQL by clicking the download link below.
          Download SQL file
 
 
Model
The Model class consists of following property.
public class CustomerModel
{
   public int CustomerId { get; set; }
}
 
 
Namespaces
You will need to import the following namespaces.
using System.Configuration;
using System.Data.SqlClient;
 
 
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 the Action Method, the CustomerId is fetched from TextBox using CustomerModel class object and passed as parameter to SqlCommand object..
The ExecuteNonQuery function is executed and the records are deleted into the SQL Server database table using ADO.Net.
Note: For more details on how to use ExecuteNonQuery function, please refer Understanding SqlCommand ExecuteNonQuery in C# and VB.Net
 
Then, the check is performed whether the record is deleted or not an appropriate message is set into a ViewBag object.
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ActionResult Index(CustomerModel customer)
    {
        string query = "DELETE FROM Customers WHERE CustomerId=@CustomerId";
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand(query, con))
            {
                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
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 Html.BeginForm method with the following parameters.
ActionName – Name of the Action. In this case the name is Index.
ControllerName – Name of the Controller. In this case the name is Home.
FormMethod – 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 created using Html.TextBoxFor method and a Submit Button.
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 MessageBox.
@model Delete_Database_MVC.Models.CustomerModel
@{
    Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    @using (Html.BeginForm("Index", "Home", FormMethod.Post))
    {
        <table cellpadding="1" cellspacing="1">
            <tr>
                <td style="width: 60px">
                    Id<br />
                    @Html.TextBoxFor(m => m.CustomerId)
                </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>
        }
    }
</body>
</html>
 
 
Screenshot
Delete data into Database in ASP.Net MVC
 
 
Downloads
Download Code