How to I display alert messages dynamically (modalpopup)

Question

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Code behind:

C#

protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void btn_Click(object sender, EventArgs e)
    {


            WarningModal.Show();
            lblWarning.Text = "This is a popup warning";

    }

Aspx file:

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="admin_webforms_BeforeLogin_Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="rvc" %>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:Button ID="btn" runat="server" onclick="btn_Click" />

<rvc:ModalPopupExtender ID="WarningModal" runat="server"
TargetControlID="btn"

CancelControlID="btnWarning"
DropShadow="true"
PopupControlID="pnlIssues" >
</rvc:ModalPopupExtender>

<!-- Panel -->
<asp:Panel ID="pnlIssues" runat="server"
BorderColor="Black" BorderStyle="Outset"
BorderWidth="2" BackColor="Wheat" Width="500px"  Height="300px">
   <center>
       <h2 class="style2">
           Information</h2>
       <p>

          <asp:Label ID="lblWarning"
runat="server"> </asp:Label>
       </p>

 <!-- Label in the Panel to turn off the popup -->
 <asp:ImageButton ID="btnWarning" runat="server"
                ImageUrl="~/admin/images/1 (4).jpg"  Width="200px" Height="200px"/>
</center>

</asp:Panel>
    </div>
    </form>
</body>
</html>

Posted 8-Nov-14 20:35pm

rahul changlani

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Raul Iloc · Accepted Answer · 2014-11-08T22:20:00

Solution 2

1.In order to activate modal popup extender you have to use also JavaScript.

2.You could have a look in my next article, and provide source code ( ContactPage sub-chapter):
Advanced ASPX GridView Pagination and Data Entities[^]

Posted 8-Nov-14 22:20pm

Raul Iloc

Updated 8-Nov-14 22:21pm

v2