<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="cmp_numRow.ascx.cs" Inherits="MP_MAG.WebUserControls.cmp_numRow" %>


righe:
<asp:TextBox runat="server" ID="txtNumRow" Text="10" Width="2em" AutoPostBack="True" OnTextChanged="txtNumRow_TextChanged" CssClass="text-end"></asp:TextBox>