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[Solved] How to show confirmation box at page load ?

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Ajax

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

Bibhudutta asked on 10 Apr 2013, 01:58 PM

Hi,

I have a login page, in which if the user enters an username which has been already been used by somebody else to login in the application, then i want to show a confirmation message. The confirmation message has to be shown only if the user provides a valid credentials and that username is already been used for another session.
I have already written down the code for this in the code behind, but I am unable to show a confirmation box at page load. I have tried with the Page.ClientScript.RegisterClientScriptBlock() and Page.ClientScript.RegisterStartupScript() but its not working. This is my aspx page's code :

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="ERPx.Web.Login" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title>BluWare</title>

<style type="text/css">

*

{

margin: 0;

padding: 0;

}

body

{

font-family: Calibri, Verdana, Helvetica, sans-serif;

background: url(images/login-page-bg.jpg) top center no-repeat #c4c4c4;

color: #3a3a3a;

}

.clear

{

clear: both;

}

form

{

width: 406px;

margin: 170px auto 0;

}

fieldset

{

border: 0;

}

</style>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager runat="server" ID="RadScriptManager1" />

<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="CheckBoxes, RadioButtons, Buttons, Textbox, Textarea, Fieldset, Label, Select, Zone, GridFormDetailsViews" />

<telerik:RadWindowManager ID="rwmMain" runat="server" />

<div>

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" Height="100%">

<asp:Panel ID="pnlLogin" runat="server" DefaultButton="btnLogin">

<asp:Image runat="server" ID="CompanyLogo" ImageUrl="~/Images/GenericLogo.png" Height="55px"

Style="position: absolute; top: 25px" />

<table width="406px" cellspacing="10px">

<tr>

<td>

Email Address

</td>

<td>

<telerik:RadTextBox ID="txtEmailAddress" runat="server" Width="260px" MaxLength="50" />

</td>

</tr>

<tr>

<td>

Password

</td>

<td>

<telerik:RadTextBox ID="txtPassword" TextMode="Password" runat="server" Width="260px"

MaxLength="50" />

</td>

</tr>

<tr>

<td>

</td>

<td>

<asp:CheckBox ID="chkRememberMe" Text="Remember Me?" runat="server" />

</td>

</tr>

<tr>

<td>

<a href="RequestLogin.aspx">Request Login</a>

</td>

<td align="right">

<asp:Button ID="btnLogin" runat="server" Text="Login " Width="75px" OnClick="btnLogin_Click" />

</td>

</tr>

<tr align="center">

<td colspan="2">

<asp:Label ID="lblError" ForeColor="Red" runat="server" Text="Invalid login. Please try again."

Visible="false" />

</td>

</tr>

</table>

<br />

BluWare <asp:Label ID="lblSoftwareVersion" runat="server" />

</asp:Panel>

</telerik:RadAjaxPanel>

</div>

</form>

</body>

</html>

protected void Page_Load(object sender, EventArgs e)

{

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Session.Abandon();

FormsAuthentication.SignOut();

if (IsPostBack)

{

if (!(String.IsNullOrEmpty(txtPassword.Text.Trim())))

{

txtPassword.Attributes["value"] = txtPassword.Text;

}

protected void btnLogin_Click(object sender, EventArgs e)

{

Users usr = new Users();

DataTable dt = usr.ValidateUser(txtEmailAddress.Text, Encryptor.Encrypt(txtPassword.Text));

if (dt.Rows.Count > 0)

{

DataRow dr = dt.Rows[0];

if (!bool.Parse(dr["UserSessionExists"].ToString()))

{

}

else

{

// Over here I am registering the starup script

Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "LoginError", "confirm('Ovverride ?');", true);

Page.ClientScript.RegisterStartupScript(this.GetType(), "LoginError", "confirm('Ovverride ?');");

}

else

{

ErrorMessage = "Invalid login information supplied.";

}

But the confirmation box is not showing. Please help me out !

3 Answers, 1 is accepted

answered on 11 Apr 2013, 07:41 AM

Thanks Shinu for the reply, but it did not work for me.
I tries with this and it shows a confirmation box, but it does not do a post back to the server on 'OK' button click. Can you tell me how to do a post back on 'OK' button click.

string markup = Format.EncodeJsString("This user has already logged in. Do you want to override current session ?");

string errorScript = @"

embedHtml({0});

function embedHtml(result)

{{

confirm(result)

}}";

ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "Confirm", string.Format(errorScript, markup), true);

answered on 11 Apr 2013, 10:48 AM

I achieved it in this way,

string overrideConfirmationScript = @"

ShowOverrideConfirmation();

function ShowOverrideConfirmation()

{{

if(confirm('This user has already logged in. Do you want to override current session ?'))

{{

__doPostBack( 'OverrideConfirmed', 'Override');

return true;

}}

}}";

ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "Confirm", string.Format(overrideConfirmationScript), true);