NKC/NKC_WF/WebUserControls/cmp_barcode.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="cmp_barcode.ascx.cs" Inherits="NKC_WF.WebUserControls.cmp_barcode" %>
<asp:UpdatePanel runat="server" ID="uplBCode">
    <ContentTemplate>
        <asp:UpdateProgress ID="UpdateProgressDisplay" runat="server" DisplayAfter="0" DynamicLayout="true">
            <ProgressTemplate>
                <div class="d-flex">
                    <div class="progress w-100" style="height: 0.5em">
                        <div class="progress-bar progress-bar-striped progress-bar-animated" style="width: 80%"></div>
                    </div>
                </div>
            </ProgressTemplate>
        </asp:UpdateProgress>
        <div class="bigText">
            <asp:TextBox runat="server" ID="txtBarcode" class="form-control" autofocus="true" OnTextChanged="txtBarcode_TextChanged"></asp:TextBox>
            <asp:LinkButton runat="server" ID="lbtReset" OnClick="lbtReset_Click" CssClass="btn btn-block bnt-default">
                <asp:Label ID="lblOutput" runat="server" />
                <i class="fa fa-refresh" aria-hidden="true"></i>
            </asp:LinkButton><asp:HiddenField ID="hfLastCmd" runat="server" />
        </div>
        <asp:HiddenField runat="server" ID="hfLastDtInput" />
        <asp:Timer ID="UiTimer" runat="server" Interval="10000" OnTick="UiTimer_Tick">
        </asp:Timer>
    </ContentTemplate>
</asp:UpdatePanel>