UpdatePanel in a UserControl (a nested Forms problem) - asp.net

I have problem with my UserControl. It has inside the UpdatePanel, but it must be placed inside the tag to get worked (otherwise, the PostBack is not asynchronous)
The problem is, if I put that UserControl in e.g. Default.aspx page, the error appears
"A page can have only one server-side Form tag"
how to cope with that ?
[edit]
the UserControl.ascx code:
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="PodmiotyZwolnioneCtrl.ascx.cs" Inherits="FormularzPodatkowy.PodmiotyZwolnioneCtrl" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<link href="AjaxStyle.css" rel="stylesheet" type="text/css" />
<!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" >
<body>
<form id="form1" runat="server">
<div>
<asp:UpdatePanel ID="UpdatePanel1"
UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<fieldset>
<legend>UpdatePanel content</legend>
<!-- Other content in the panel. -->
<%=DateTime.Now.ToString() %>
<br />
<asp:Button ID="Button1"
Text="Refresh Panel"
runat="server" />
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
the WebForm1.aspx code:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="FormularzPodatkowy.WebForm1" %>
<%# Register src="PodmiotyZwolnioneCtrl.ascx" tagname="PodmiotyZwolnioneCtrl" tagprefix="uc1" %>
<!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">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<uc1:PodmiotyZwolnioneCtrl ID="PodmiotyZwolnioneCtrl1" runat="server" />
</form>
</body>
</html>


Your code should be:
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="PodmiotyZwolnioneCtrl.ascx.cs" Inherits="FormularzPodatkowy.PodmiotyZwolnioneCtrl" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<link href="AjaxStyle.css" rel="stylesheet" type="text/css" />
<div>
<asp:UpdatePanel ID="UpdatePanel1"
UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<fieldset>
<legend>UpdatePanel content</legend>
<!-- Other content in the panel. -->
<%=DateTime.Now.ToString() %>
<br />
<asp:Button ID="Button1"
Text="Refresh Panel"
runat="server" />
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
</div>
It looks like you converted a page to a control and forgot to remove the page-specific elements
Also, if your postbacks are not asynchronous, look at your web.config for:
<xhtmlConformance mode="Legacy"/>
and change it to:
<xhtmlConformance mode="Transitional"/>
I just spent three days at work finding that solution to UpdatePanel always posting back to the server.


You should check both the usercontrol and the page and make sure that you only have one <form id='form1' runat='server'> tag in your markup. Having more than one will give you the error that you're experiencing.
Good luck, and hope this helps some.

Related

Masterpage blocking search bar

I have a page with a gridview that displays results from a query and has paging and a search bar. It works fine when I load it by itself with not master page however when I add the master page to it all the controls disappear. below is the code with the master page and without
<%# Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeFile="Default3.aspx.cs" Inherits="_Default" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent"
Runat="Server">
<%# Import Namespace="GridView" %>
<div>
<div align="center" class="padded" >
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
Font-Size="Large" OnSelectedIndexChanged="Refresh_Click">
</asp:DropDownList>
<asp:Button ID="Refresh" runat="server" OnClick="Refresh_Click"
Text="Search" Visible="False" />
</div>
<div>
<cc1:HTMLGridView ID="HTMLGridView1" runat="server"
OnRowDataBound="OnRowDataBound2"/>
</div>
Here is the code that works with no master page
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs"
Inherits="_Default" %>
<%# Register assembly="GridView" namespace="GridView" tagprefix="cc1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<div align="center" class="padded" >
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
Font-Size="Large" OnSelectedIndexChanged="Refresh_Click">
</asp:DropDownList>
<asp:Button ID="Refresh" runat="server" OnClick="Refresh_Click"
Text="Search" Visible="False" />
</div>
<cc1:HTMLGridView ID="HTMLGridView1" runat="server"
OnRowDataBound="OnRowDataBound2" allowDeleting="False" allowEditing="False"
allowView="False"/>
</form>
</body>
</html>
I also added the reference to the web.config file but I have had no luck
<add tagPrefix="cc1" namespace="GridView" assembly="GridView" />
Where am I going wrong?

Try adding
<%# Import Namespace="GridView" %>
before
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent"
Runat="Server">

Element 'CalendarExtender' is not a known element

I am getting the above error despite include the AjaxControlToolkit.dll in my project and added the below in the .aspx:
<%# Register
Assembly="AjaxControlToolkit"
Namespace="AjaxControlToolkit"
TagPrefix="ajaxToolkit"%>
What could I be missing here?
My page:
<%# Page Language="C#" AutoEventWireup="true" CodeFile="test2.aspx.cs" Inherits="test2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<ajaxToolkit:ToolkitScriptManager id="ToolkitScriptManager1" runat="server"></ajaxToolkit:ToolkitScriptManager>
<div>
<asp:TextBox runat="server" ID="txtDateFerie" autopostback="True"/>
<asp:Button runat="Server" ID="ibtnDateFerie"
CausesValidation="False" />
<ajaxToolkit:CalendarExtender Format="dd/MM/yyyy" ID="cbeDateFerie" runat="server" Enabled="True"
TargetControlID="txtDateFerie" PopupButtonID="ibtnDateFerie" />
</div>
</form>
</body>
</html>

Master page content not showing up in child

I know there is something I am missing on this
But am unable to figure out that
I have this master page:
<%# Master Language="C#" AutoEventWireup="true" CodeBehind="Mains.master.cs" Inherits="Sportsstop.Mains" %>
<!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>Sports Stop</title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
N there is this Child page which should merge with the above master page:
<%# Page Title="" Language="C#" MasterPageFile="~/Mains.Master" AutoEventWireup="true" CodeBehind="Home.aspx.cs" Inherits="Sportsstop.Home" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server" >
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
</asp:Content>

Your textbox should be in child page, inside ContentPlaceholder1. I think that the one in master page is ignored.
If you want to have TextBox in master page, it cannot be inside ContentPlaceholder
Think about placeholder as a place, where the content from child page gets injected

How to open ajax model popup extender just like facebook image viewer?

I want to use ajax ModelpopupExtender control in my .aspx page in visual studio 2010. When user clicks any button,It should open popup like facebook opens popup to show photos. That means pop up should get opened in such a way that it should disable the background until closed button is clicked of that popup. How to open page or panel or any other thing in that popup. Please mention clear steps. I dont have even bit of idea how to do this?
Thanks in advance...

<%# Page Language="C#" AutoEventWireup="true"
CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%# Register Assembly="AjaxControlToolkit"
Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<!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>Ajax Model PopUp Extender With MouseOver Example</title>
<link href="StyleSheet.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript">
function MouseHover()
{
$find("modelPopupExtender1").show();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<ajaxToolkit:ToolkitScriptManager ID="toolKitScriptManager1"
runat="server">
</ajaxToolkit:ToolkitScriptManager>
<p style="background-color: #9999FF; width: 95%;">
Example of using a ModalPopupExtender with with Mouse Over
<br/></p><br/>
Hover over the hyperlink
<asp:HyperLink ID="HyperLink1" runat="server"
onmouseover="MouseHover();"
Font-Underline="True" ForeColor="Blue">
<b>Mouse Over Here to Open PopUp</b>
</asp:HyperLink> to open pop up
<ajaxToolkit:ModalPopupExtender runat="server"
BehaviorID="modelPopupExtender1"
TargetControlID="HyperLink1"
PopupControlID="popUpPanel"
OkControlID="btnOk"
BackgroundCssClass="modalBackground" >
</ajaxToolkit:ModalPopupExtender>
<asp:Panel ID="popUpPanel" runat="server"
CssClass="confirm-dialog">
<div class="inner">
<h2>
Thanks For Visiting This Site</h2>
<div class="base">
<asp:Button ID="btnOk" runat="server" Text="Ok"/>
<asp:LinkButton ID="LinkButton1" runat="server"
CssClass="close"
OnClientClick="$find('modelPopupExtender1').hide(); return false;"/>
</div></div>
</asp:Panel>
</div>
</form>
</body>
</html>
BackgroundCssClass="modalBackground" did you notice this line this is where you define the css for the background.
I think this should work.
Reference

Need help with a simple ASP.NET ModalPopupExtender example

I'm new to ASP.NET and I'm trying to get this Ajax ModalPopupExtender working. This is an example i found on the net, but nothing happens when btnpopup is clicked.
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ModalTestProject._Default" %>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager id="ScriptManager1" runat="server">
</asp:scriptmanager>
<asp:Button ID="btnpopup" runat="server" Text="Button" />
<ajaxToolkit:ModalPopupExtender ID="mpe" runat="server" TargetControlID="btnpopup" PopupControlID="pnlpopup"
CancelControlID="btnCancelpopup" EnableViewState="true" DropShadow="true" />
<asp:Panel ID="pnlpopup" runat="server" Width="400px">
test
<asp:Button ID="btnCancelpopup" runat="server" Text="Button" />
</asp:Panel>
</form>
</body>
</html>

You are missing the PopupControlID="pnlpopup"

Try using ToolkitScriptManager instead of ScriptManager:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="atk" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>
</title>
<style type="text/css" media="screen">
#import url("../css/Main.css");
</style>
<script type='text/javascript' src="../js/jquery-1.7.1.min.js"></script>
</head>
<body class="template">
<form id="form1" runat="server">
<atk:ToolkitScriptManager ID="ScriptManager1"
runat="server" EnableScriptGlobalization="True">
</atk:ToolkitScriptManager>

Make sure your project references 'AjaxControlToolkit.dll'
Make sure your web.confog contains the following section:
<controls>
<add namespace="AjaxControlToolkit" assembly="AjaxControlToolkit" tagPrefix="ajaxToolkit"/>
...
</controls>
Try wrapping the entire thing in an UpdatePanel like so:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="btnpopup" runat="server" Text="Button" />
<ajaxToolkit:ModalPopupExtender ID="mpe" runat="server" TargetControlID="btnpopup" PopupControlID="pnlpopup"
CancelControlID="btnCancelpopup" EnableViewState="true" />
<asp:Panel ID="pnlpopup" runat="server">
test
<asp:Button ID="btnCancelpopup" runat="server" Text="Button" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>

I have never ever ever been able to make the popup extender work! Never, regardless of how simple or basic the page or example is, period!
Even this most basic example will not work! Yes, the tool kit is installed! When the button is pressed, nothing happens!
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!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 id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager id="ScriptManager1" runat="server">
</asp:scriptmanager>
<asp:Button ID="btnpopup" runat="server" Text="Button" />
<asp:ModalPopupExtender ID="mpe" runat="server" TargetControlID="btnpopup" PopupControlID="pnlpopup"
CancelControlID="btnCancelpopup" EnableViewState="true" DropShadow="true" />
<asp:Panel ID="pnlpopup" runat="server" Width="400px">
test
<asp:Button ID="btnCancelpopup" runat="server" Text="Button" />
</asp:Panel>
</form>
</body>
</html>
I've wasted more time with this thing then anyone ever should spend! I've made my own custom popup extender which works flawlessly!

I think you are missing the Register directive. You should add something like
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolKit" %>
after the
`<%# Page ... %>' directive

I have the same problem, and I have ScriptManager inherited from Master page.
Everything doesn't work, if I reverse the control, which means PopUpControlID=btnpopup and TargetControlID=pnlpopup, then it would work, and with DropShadow=True, the btnpopup would have a dropshadow effect. I wonder why the reverse logic for modalpopup works for button and not for panel?
Please note that inherited ScriptManager from Master Page won't work, if you put a single ScriptManager on your page itself, it will work fine.
Cheers!

You can show the popup panel with javascript. I'm not sure if there's any other way, but this works like a charm. I used it for a comment control I created.
function show_panel() {
$find('popup_panel').show();
return false;
}
The control to fire the event:
<input id="btnReply" type="button" class='comment-reply' onclick="show_panel();"
value="reply" runat="server" />
And lastly, the popup extender and the popup panel. Just change the cc1 prefix to whatever you're using, eg. asp, ajaxtoolkit, etc.
<cc1:ModalPopupExtender ID="ModalPopupExtender2" runat="server"
CancelControlID="CancelButton" BehaviorID="popup_panel"
TargetControlID="Hidden1" PopupControlID="PopupReplyPanel"
BackgroundCssClass="modalBackground" DropShadow="true" >
</cc1:ModalPopupExtender>
<asp:Panel ID="PopupReplyPanel" class="popup-panel" runat="server">
<div class="popup-panel">
Your popup panel
<span class="ok-cancel-btns">
<input id="Hidden1" type="hidden" runat="server"/>
<asp:Button ID="okButton" runat="server" Text="Post Comment" />
<input id="CancelButton" type="button" value="Cancel" />
</span>
</div>
</asp:Panel>
Here's the styles I used, you'll obviously need to change some of them to suit your needs.
<style>
/*Modal Popup Styles*/
.modalBackground{background-color:black;opacity:0.4;filter:alpha(opacity=40); /* For IE8 and earlier */}
.popup-panel{padding:5px 5px 20px 5px;background-color:#f7f3ef;}
.ok-cancel-btns{padding-top:10px;float:right;}
.ok-cancel-btns input{margin-left:10px;text-align:right;}
</style>

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