code add to database

=============== code add to database
  Try
            If (con.State = ConnectionState.Open) Then
                con.Close()
            End If
            cmd.CommandType = System.Data.CommandType.Text

            cmd.CommandText = "Insert Into dbo.tbCar values ('" & txtModel.Text & "','" & txtYear.Text & "'," & txtPrice.Text & "," & txtQty.Text & ")"
            cmd.Connection = con
            con.Open()
            cmd.ExecuteNonQuery()
            strQ = "SELECT * FROM tbCar ORDER BY [Model]"
            load_data(strQ)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
 
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