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How can I disable Back-arrow of browser in asp.net c#

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This is a migrated thread and some comments may be shown as answers.

Jenny asked on 06 Dec 2018, 09:53 AM

Posted 23 hours ago
Hello,
I have homepage with login page. When I am login in it should redirect to homepage but on homepage back arrow of browser should disabled but not forword arrow.
Below i have attached code which i have tried:

This is my Login page code:

<%@ Page Title="" Language="C#" MasterPageFile="~/Login.Master" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="EmployeePortal.Login" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">

<style type="text/css">

.content {

max-width: 700px;

margin: auto;

margin-top: 5px;

background: #fbfdff;

color:#000066;

}

.auto-style3

{

width: 210px;

}

.auto-style4

{

width: 6px;

}

.auto-style5

{

width: 10px;

}

.btnPass{

cursor: pointer;

border-style: none;

background-color: #fbfdff;

}

.txbox{

border-color:#c5e4ed;

border-radius:3px;

border-width:2px;

}

.auto-style6 {

width: 6px;

height: 49px;

}

.auto-style7 {

width: 10px;

height: 49px;

}

.auto-style8 {

width: 210px;

height: 49px;

}

.auto-style9 {

height: 20px;

}

.auto-style10 {

width: 6px;

height: 51px;

}

.auto-style11 {

width: 1px;

height: 20px;

}

.auto-style12 {

height: 51px;

}

</style>

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

<script type="text/javascript">

function preventBack() { window.history.forward(); }

setTimeout("preventBack()", 0);

window.onunload = function () { null };

</script>

<script type="text/javascript">

window.onload = pageLoad;

function btnPasswordClick()

{

             window.radopen("ResetPass.aspx?email=" + document.getElementById('<%=txtEmployeeID.ClientID%>').value.trim(), "Reset Password",580,400,10,10).center;

}

function RadWindowClose(sender, args)

{

var refresh = args.get_argument();

if (refresh != true) return false;

}

function showBrowserEntry()

{

var lbl = document.getElementById('<%= txtBrowser.ClientID%>').style.display = 'inherit';

}

</script>

<telerik:RadScriptManager runat="server"></telerik:RadScriptManager>

<telerik:RadWindowManager ID="RadWindowManager1" runat="server" RenderMode="Lightweight" EnableShadow="true" ReloadOnShow="true" ShowContentDuringLoad="false" VisibleStatusbar="false" Modal="true" Behaviors="Close, Move" OnClientClose="RadWindowClose">

</telerik:RadWindowManager>

<table width="100%" align="center" cellpadding="0" cellspacing="0">

<tr>

<td colspan="2" align="center" style="color:darkblue">

<font face="arial" font-size="x-large" font-weight="300">Welcome to the CPS Portal</font>

<p colspan="2" align="center" style="font-size:smaller;font-weight:200">

<font face="arial" font-size="smaller"> Enter Your Login Information</font>

</p>

</td>

</tr>

<tr>

<td colspan="4" align="center">

<table width="100%" border="0" cellpadding="10px" cellspacing="5px" >

<tr id="trlblError2" runat="server">

<td colspan="4" align="center">

<asp:Label runat="server" ID="lblErrormessage" SkinID="Error" ForeColor="Red"></asp:Label></td>

</tr>

<tr id="trlblEmployeeID">

<td colspan="4" class="auto-style3">

<asp:Label ID="lblEmail" runat="server" Text="Email Address" Font-Size="smaller" Font-Names="arial"></asp:Label><br />

<asp:TextBox ID="txtEmployeeID" runat="server" Width="350px" Height="20px" CssClass="txbox" align="center" colspan="4"></asp:TextBox>

</td>

</tr>

<tr id="trlblPassword">

<td colspan="4" class="auto-style8">

<asp:Label ID="lblPassword" runat="server" Text="Password" Font-Size="smaller" Font-Names="arial"></asp:Label><br/>

<asp:TextBox ID="txtPassword" TextMode="Password" runat="server" MaxLength="20" CssClass="txbox" Width="350px" Height="20px" align="center" colspan="4"></asp:TextBox><br/>

<div style="margin-top:10px;">

<asp:Button runat="server" CssClass="btnPass" CausesValidation="false" OnClientClick="btnPasswordClick(); return false;" ID="btnForgotPass" Text="Forgot Password?" Font-Names="arial" Width="350px" ForeColor="#000066" align="center" />

</div>

</td>

</tr>

<tr>

<td align="center" colspan="4">

<div><asp:RequiredFieldValidator ID="rfEmployeeID" runat="server" ErrorMessage="Enter Email Address"

ControlToValidate="txtEmployeeID" Display="Dynamic" SetFocusOnError="true" Font-Names="arial" Font-Size="14px" ForeColor="Red"></asp:RequiredFieldValidator></div>

<div><asp:RequiredFieldValidator ID="rfPassword" runat="server" ErrorMessage="Enter Password"

ControlToValidate="txtPassword" Display="Dynamic" SetFocusOnError="true" Font-Names="arial" Font-Size="14px" ForeColor="Red"></asp:RequiredFieldValidator></div>

</td>

</tr>

<tr>

<td align="left" style="width:2px; padding:0px;" colspan="1" class="auto-style11" oncontextmenu="showBrowserEntry()">

<asp:TextBox ID="txtBrowser" runat="server" Style="display: none;" Text="N/A"></asp:TextBox> </td>

<td class="auto-style12" align="center" colspan="4">

<asp:ImageButton ID="btnLogin" runat="server" ImageUrl="~/Images/Login2.gif" Color="#000066" OnClick="btnLogin_Click" />

</td>

</tr>

</table>

<div align="center">

<asp:Panel ID="pnlLogin1" runat="server">

</asp:Panel>

</div>

</td>

</tr>

</table>

<asp:HiddenField runat="server" ID="hdfBrowser" />

</asp:Content>

This is my home page:

<%@ Page Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="HomePage.aspx.cs" Inherits="EmployeePortal.HomePage" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">

<script type="text/javascript">

function RadWindow1_ClientClose(sender, args) {

//$find("RadToolBar1").findItemByValue("Delete").click();

__doPostBack('pdfStamper', 'PdfSave');

}

function CloseRadWindow() {

//get a reference to the current RadWindow

var wndow = GetRadWindow();

wndow.Close();

}

function OnClientResizeEnd(sender, eventArgs) {

logEvent("<strong>OnClientResizeEnd</strong>: RadWindow is resize ended");

}

function UseRadWindow() {

var oManager = GetRadWindowManager();

var oWnd = oManager.getWindowByName("DialogWindow");

oWnd.show();

oWnd.setSize(400, 400);

oWnd.minimize();

oWnd.maximize();

oWnd.restore();

}

function OnClientResizeStart(sender, eventArgs) {

logEvent("<strong>OnClientResizeEnd</strong>: RadWindow is resize started");

}

function GetRadWindow() {

var oWindow = null;

if (window.radWindow) oWindow = window.radWindow;

else if (window.frameElement.radWindow) oWindow = window.frameElement.radWindow;

return oWindow;

}

function showReport(pdfPath) {

var mywindow;

// pdfPath = "../HR/Forms/PDF_Files/DEMOCO/152-02-2018_W-4.pdf";

mywindow = window.radopen(pdfPath, "RadWindowPDF");

}

function OnClientValidationFailed(sender, args) {

            var fileExtention = args.get_fileName().substring(args.get_fileName().lastIndexOf('.') + 1, args.get_fileName().length);

if (args.get_fileName().lastIndexOf('.') != -1) {//this checks if the extension is correct

if (sender.get_allowedFileExtensions().indexOf(fileExtention)) {

alert("Only PDF files are allowed.");

}

else {

alert("Wrong file size!");

}

else {

alert("not correct extension!");

}

function promptCallBackFn(arg) {

$get("<%= hdfPrompt.ClientID %>").value = arg;

__doPostBack();

}

</script>

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<telerik:RadWindowManager ID="RadWindowManager1" runat="server" VisibleOnPageLoad="True" AutoSizeBehaviors="Width"

Height="768px" Width="1024px" Skin="Office2007" Behaviors="Default" KeepInScreenBounds="True" Style="z-index: 12345"

Modal="false" VisibleStatusbar="false" ShowContentDuringLoad="true" DestroyOnClose="true">

<Windows>

<telerik:RadWindow Title="RadGrid PDF Output" runat="server" ID="RadWindowPDF" Skin="Office2007" KeepInScreenBounds="true" Style="overflow-x: hidden; overflow-y: hidden; z-index: 1000"

ReloadOnShow="true" VisibleOnPageLoad="false" Behaviors="Close,Maximize,move" OnClientClose="RadWindow1_ClientClose"

Width="700px" Height="800px" MaxWidth="1000px" MaxHeight="900px">

</telerik:RadWindow>

</Windows>

</telerik:RadWindowManager>

<asp:HiddenField runat="server" ID="hdfPrompt" Value="" />

<style type="text/css">

.label {

border-color: #000066;

color: darkblue;

font-family: Arial, Helvetica, sans-serif;

margin-top: 7px;

padding: 5px;

}

.td {

border-color: #000066;

}

.RadButton.rbButton.rbPrimary {

padding-left: 3.5em !important;

}

.img-circle {

width: 50px;

height: 50px;

}

</style>

<table style="width: 99%; height: 340px;">

<tr>

<td style="vertical-align: top; width:10%; height:10%">

<div style="float: initial" id="imgpic">

<telerik:RadBinaryImage ID="RBILogo" runat="server" Width="35px" />

</div>

</td>

<td rowspan="2" style="border-style: none; border-color: inherit; border-width: medium; width: 35%; padding-left: 2px" class="td">

<asp:TextBox ID="txtmsg" ReadOnly="true" Font-Size="Medium" ForeColor="darkblue" Style="resize: none" BackColor="#ebf0ff" SkinID="bootstrap" BorderStyle="solid" BorderColor="#c5c7c5" TextMode="MultiLine" Width="97%" Height="300px" runat="server" CssClass="label" EnableTheming="False"></asp:TextBox>

</td>

<td rowspan="2" style="border-style: none; width: 35%; margin-top: 2px; padding-right: 20px; color: darkblue">

<telerik:RadDockLayout ID="RadDockLayout1" runat="server" OnLoad="RadDockLayout1_Load" Skin="Windows7">

<telerik:RadDockZone ID="RadDockZone1" runat="server" Height="300px" Width="100%" MinHeight="100px" Style="float: left; margin-top: 2px; margin-left: 8px; margin-right: 0px;" RenderMode="Lightweight" Skin="Windows7" ForeColor="DarkBlue">

</telerik:RadDockZone>

</telerik:RadDockLayout>

</td>

</tr>

</table>

<table style="width: 98%; height: 150px; margin-left: 5px;">

<tr>

<td style="width: 30%;">

<telerik:RadButton RenderMode="Lightweight" runat="server" ID="rbtnMyProfile" Height="80px" Width="200px" Text="My Profile" OnClick="RadMyProfile_Click" Skin="Bootstrap" ForeColor="#ffffff" BackColor="#15D67F" Font-Size="20px">

<Icon PrimaryIconUrl="images/profile.png" PrimaryIconTop="16px" PrimaryIconLeft="20px" PrimaryIconWidth="50px" PrimaryIconHeight="50px"></Icon>

</telerik:RadButton>

</td>

<td style="width: 30%;">

<telerik:RadButton RenderMode="Lightweight" runat="server" ID="rbtnMyDD" Height="80px" Width="200px" Text="Direct Deposit" OnClick="RadMyDD_Click" Skin="Bootstrap" ForeColor="#ffffff" BackColor="#0876b4" Font-Size="20px">

<Icon PrimaryIconUrl="images/deposit.png" PrimaryIconTop="16px" PrimaryIconLeft="20px" PrimaryIconWidth="50px" PrimaryIconHeight="50px"></Icon>

</telerik:RadButton>

</td>

<td style="width: 30%;">

<telerik:RadButton RenderMode="Lightweight" runat="server" ID="rbtnMyDeds" Height="80px" Width="200px" Text="Deductions" OnClick="RadMyDeds_Click" Skin="Bootstrap" ForeColor="#ffffff" BackColor="#15D67F" Font-Size="20px">

<Icon PrimaryIconUrl="images/deductions.png" PrimaryIconTop="16px" PrimaryIconLeft="20px" PrimaryIconWidth="50px" PrimaryIconHeight="50px"></Icon>

</telerik:RadButton>

</td>

<td style="width: 30%;">

<telerik:RadButton RenderMode="Lightweight" runat="server" ID="rbtnForms" Height="80px" Width="200px" Text="Forms & Documents" OnClick="RadForms_Click" Skin="Bootstrap" ForeColor="#ffffff" BackColor="#0876b4" Font-Size="20px">

<Icon PrimaryIconUrl="images/filesdocs.png" PrimaryIconTop="16px" PrimaryIconLeft="20px" PrimaryIconWidth="50px" PrimaryIconHeight="50px"></Icon>

</telerik:RadButton>

</td>

</tr>

</table>

<table>

<tr>

<td style="width: 80%; border: solid 1px; border-color: #c5c7c5; padding: 5px; padding-bottom: 20px">

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1" Height="100%" BorderColor="#000066">

<asp:Label ID="lblRecentPay" Style="text-align: right;" runat="server" Text="My Recent Pay Check:" CssClass="label" ForeColor="darkblue" Font-Names="arial">

</asp:Label>

<asp:DropDownList ID="ddlChecks" runat="server" Width="200px" AutoPostBack="true" OnSelectedIndexChanged="ddlChecks_SelectedIndexChanged" CssClass="RadDropDownList_CustomDD">

</asp:DropDownList>

<br />

<telerik:RadGrid ID="RadgridRecentPay" runat="server" EnableEmbeddedSkins="False" Skin="Custom1" Width="100%" Height="105px" Font-Names="Arial" Font-Size="Small" RenderMode="Lightweight">

<ClientSettings>

<Scrolling AllowScroll="True" UseStaticHeaders="true" />

</ClientSettings>

<GroupingSettings CollapseAllTooltip="Collapse all groups" />

<MasterTableView AutoGenerateColumns="false" ForeColor="DarkBlue" Font-Size="Smaller">

<Columns>

<telerik:GridBoundColumn DataField="GROSSPAY" HeaderText="Gross Pay">

<HeaderStyle HorizontalAlign="Center" />