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How to show confirmation box at page load ?

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Ajax
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Bibhudutta
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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">
<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 />
                <br />
                <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

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Shinu
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Rank 2
answered on 11 Apr 2013, 04:55 AM
Hi,

Try the following code to show radconfirm.
C#:
protected void Button2_Click(object sender, EventArgs e)
   {
       string radalertscript = "<script language='javascript'>function f(){callConfirm(); Sys.Application.remove_load(f);}; Sys.Application.add_load(f);</script>";
       Page.ClientScript.RegisterStartupScript(this.GetType(), "radalert", radalertscript);
   }
JS:
function callConfirm() {
        radconfirm('Are you sure?', confirmCallBackFn);
    }

Thanks,
Shinu
0
Bibhudutta
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Rank 1
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);
0
Bibhudutta
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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);
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Ajax
Asked by
Bibhudutta
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Answers by
Shinu
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Bibhudutta
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