VB.NET MySQL: How to Create, Read, Update, Delete (CRUD)

To support you in understanding this topic, please read also these articles:

I divide this topic into 4 parts. Make sure you have read the previous article.

The next process is to delete a row. What users do for deleting is they choose a row to delete then click the Delete button. I also add a message for confirmation before the actual delete process. The code below is typed under tbrDelete_Click event.

Private Sub tbrDelete_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles tbrDelete.Click

    If MsgBox("Yakin akan menghapus data?", MsgBoxStyle.YesNo, _
              "Konfirmasi") = MsgBoxResult.No Then Exit Sub

    Dim myCommand As New MySqlCommand

    conn = New MySqlConnection()
    conn.ConnectionString = "server=localhost;user id=root;" & _
                            "password=;database=database"
    Try
        conn.Open()
        SQL = "DELETE FROM class WHERE classcode = " & _
              "'" & grdData.CurrentRow.Cells(0).Value & "'"

        myCommand.Connection = conn
        myCommand.CommandText = SQL
        myCommand.ExecuteNonQuery()

        MsgBox("Data terhapus")

        tbrCancel_Click(Nothing, Nothing)

        conn.Close()
    Catch myerror As MySqlException
        MessageBox.Show("Error: " & myerror.Message)
    Finally
        conn.Dispose()
    End Try
End Sub

Last code to be added is under tbrClose_Click event. Its function is to close the form.

Private Sub tbrClose_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles tbrClose.Click
    Me.Close()
End Sub

All done with CRUD. Let's try to run.