Solved

Create Multiple ModalPopupExtenders Dynamically in C#

Posted on 2009-04-07
2
3,248 Views
Last Modified: 2012-05-06
Hello,

I am trying to create multiple buttons and associated modalpopupextenders, dynamically.  When I create only one button and one modalpopupextender, the popup works.  But when I try to create more than one button and more than one modalpopupextender, the buttons and popups don't work.

I'd very much appreciate any insights.  The code is below and can be tested just by pasting it into a new .aspx file.  To test the creation of multiple versus single sets of buttons and associated modalpopupextenders, just change the value of "numberOfButtonsAndModalPopups" on line 7 below.

 This code will work for " numberOfButtonsAndModalPopups = 1 ", but not for 2, 3, 4 or more...
 
Thanks in advance for any help!
<%@ Page Language="C#" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">    
    protected void Page_Load(object sender, EventArgs e)
    {
        int numberOfButtonsAndModalPopups = 1;
        
        for (int i = 1; i <= numberOfButtonsAndModalPopups; i++)
        {
            Button btnNew = new Button();
 
            btnNew.ID = "BtnPopup" + i.ToString();
 
            btnNew.Text = "Click Me to Show PopUp Number " + i.ToString();
 
            AjaxControlToolkit.ModalPopupExtender modalPop = new AjaxControlToolkit.ModalPopupExtender();
 
            modalPop.ID = "MpePopUp" + i.ToString();
 
            modalPop.PopupControlID = "ModalPanel";
 
            modalPop.TargetControlID = "BtnPopup" + i.ToString();
 
            modalPop.DropShadow = true;
 
            modalPop.CancelControlID = "btnCancel";
 
            this.Panel1.Controls.Add(modalPop);
 
            this.Panel1.Controls.Add(btnNew);
        }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:Panel ID="Panel1" runat="server"></asp:Panel>
            <asp:Panel ID="ModalPanel" runat="server" Style="display: none" BackColor="Gray">
                Dynamic ModalPopup!
                <asp:Button ID="btnCancel" runat="server" Text="Close Me" />
            </asp:Panel>
        </ContentTemplate>
        </asp:UpdatePanel>
    </form>
</body>
</html>

Open in new window

0
Comment
Question by:suchandsuch
2 Comments
 
LVL 14

Accepted Solution

by:
GiftsonDJohn earned 500 total points
ID: 24094247
Hi,

The issue is because of the DropShadow behavior. Whenever you enable the DropShadow Property, the dom will initiate the Shadow behavior for the Modal Popup Panel. So when you enable multiple modal popup extenders for the same panel, it gets conflict and it is not able to initiate the shadow effect and will throw the following javascript error.

Sys.InvalidOperationException: Two components with the same id 'ModalPanel$DropShadowBehavior' can't be added to the application.

The above error states that already a behavior for DropShadow is added to the ModalPanel object. So another control can't create a shadow behavior for the same.

If you make DropShadow=false your code will work.
0
 
LVL 1

Author Closing Comment

by:suchandsuch
ID: 31567808
Fantastic - thanks Giftson - I didn't even see the Javascript error.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question