In this article I will explain with an example, how to delete data from MySQL database with Stored Procedure in ASP.Net using C# and VB.Net.
 
 

Database

I have made use of the following table Customers with the schema as follows.
Delete with Stored Procedure from MySQL Database in ASP.Net
 
I have already inserted few records in the table.
Delete with Stored Procedure from MySQL Database in ASP.Net
 
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 ;
 
 

HTML Markup

The HTML Markup consists of following controls:
TextBox – For capturing CustomerId of the Customer record to be deleted.
Button – For deleting the record.
The Button has been assigned with an OnClick event handler.
<table border="0" cellpadding="0" cellspacing="0">
    <tr>
        <td style="width: 60px">Id<br />
            <asp:TextBox ID="txtId" runat="server" Width="50px" />
        </td>
        <td style="width: 200px">
            <br />
            <asp:Button Text="Delete" runat="server" OnClick="OnDelete" />
        </td>
    </tr>
</table>
 
 

Namespaces

You will need to import the following namespaces.
C#
using System.Data;
using System.Configuration;
using MySql.Data.MySqlClient;
 
VB.Net
Imports System.Data
Imports System.Configuration
Imports MySql.Data.MySqlClient
 
 

Deleting with Stored Procedure from MySQL Database in ASP.Net

When Delete button is clicked, first the connection is read from Web.Config file.
Note: For more details on how to read connection string from Web.Config file, please refer my article Read or Write Connection Strings in Web.Config file using ASP.Net using C# and VB.Net.
 
The CustomerId is fetched from the TextBox and passed as parameter.
Then, using ExecuteNonQuery method record is deleted from the MySQL database using Stored Procedure.
Note: For more details on ExecuteNonQuery method, please refer my article Understanding MySqlCommand ExecuteNonQuery in C# and VB.Net.
 
Finally, based on whether record is deleted or not, an appropriate message is displayed in JavaScript Alert Message Box using RegisterStartupScript method.
C#
protected void OnDelete(object sender, EventArgs e)
{
    string spName = "Customers_DeleteCustomer";
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (MySqlConnection con = new MySqlConnection(constr))
    {
        using (MySqlCommand cmd = new MySqlCommand(spName,con))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@CustomerId", txtId.Text);
            con.Open();
            int i = cmd.ExecuteNonQuery();
            con.Close();
 
            if (i > 0)
            {
                ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Customer record deleted.');",true);
            }
            else
            {
                ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Customer not found.');",true);
            }
        }
    }
}
 
VB.Net
Protected Sub OnDelete(ByVal sender As Object, ByVal e As EventArgs)
    Dim spName As String = "Customers_DeleteCustomer"
    Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As MySqlConnection = New MySqlConnection(constr)
        Using cmd As MySqlCommand = New MySqlCommand(spName, con)
            cmd.CommandType = CommandType.StoredProcedure
            cmd.Parameters.AddWithValue("@CustomerId", txtId.Text)
            con.Open()
            Dim i As Integer = cmd.ExecuteNonQuery()
            con.Close()
 
            If i > 0 Then
                ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('Customer record deleted.');",True)
            Else
                ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('Customer not found.');",True)
            End If
        End Using
    End Using
End Sub
 
 

Screenshot

Delete with Stored Procedure from MySQL Database in ASP.Net
 
 

Downloads

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