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ASP.NET: UpdatePanel not displaying even when Visible set to True

I have two Update Panels in an aspx page and one ModalPopupExtender inside each of them. The problem I am facing is that, I have set the Visible property to false in the aspx page and set it to True when it needs to be displayed. But the UpdatePanel is not showing up even though I have set Visible=True property.
aspx code:
<%--Request closed --%>
<asp:UpdatePanel ID="udpModalReqClose" runat="server" Visible="false">
<ContentTemplate>
<div style="display:none">
<asp:Button ID="btnDummyButton_ReqClose" UseSubmitBehavior="true" runat="server" Text="DummyButton" Style="display: none;" />
</div>
<asp:Panel ID="pnlCloseReq" runat="server" BackColor="White" BorderStyle="Solid" BorderColor="Black" BorderWidth="1px">
<div>
<table id="Table24" runat="server" border="0" cellpadding="4" cellspacing="10" width="400px">
<tr>
<td align="center">
<asp:Label ID="lblcloseSuccessOPR" runat="server" Font-Bold="true" ForeColor="Red" />
</td>
</tr>
<tr>
<td style="height: 5px;"></td>
</tr>
<tr>
<td align="center">
<asp:Button ID="btn_okclose" runat="server" SkinID="btnSearch" CssClass="btnSearch" OnClick="btnPOCPIRedirect_Click"
CausesValidation="false" align="center" Text="OK" Width="65px" />
</td>
</tr>
<tr>
<td style="height: 5px;"></td>
</tr>
</table>
</div>
</asp:Panel>
<cc1:ModalPopupExtender ID="mpeClosedSuccess" runat="server" PopupControlID="pnlCloseReq" TargetControlID="btnDummyButton_ReqClose"
BackgroundCssClass="modalPopup1" DropShadow="true" BehaviorID="mpe">
</cc1:ModalPopupExtender>
</ContentTemplate>
</asp:UpdatePanel>
<%--Request declined --%>
<asp:UpdatePanel ID="udpModalReqDecline" runat="server" Visible="false">
<ContentTemplate>
<div style="display:none">
<asp:Button ID="btnDummyButton_ReqDecline" UseSubmitBehavior="true" runat="server" Text="DummyButton" Style="display: none;" />
</div>
<asp:Panel ID="pnlRequestDecline" runat="server" BackColor="White" BorderStyle="Solid" BorderColor="Black" BorderWidth="1px">
<div>
<table id="Table17" runat="server" border="0" cellpadding="4" cellspacing="10" width="400px">
<tr>
<td align="center">
<asp:Label ID="lblRequestDecline" runat="server" Font-Bold="true" ForeColor="Red" />
</td>
</tr>
<tr>
<td style="height: 5px;"></td>
</tr>
<tr>
<td align="center">
<asp:Button ID="Button4" runat="server" SkinID="btnSearch" CssClass="btnSearch" OnClick="btnPOCPIRedirect_Click"
CausesValidation="false" align="center" Text="OK" Width="65px" />
</td>
</tr>
<tr>
<td style="height: 5px;"></td>
</tr>
</table>
</div>
</asp:Panel>
<cc1:ModalPopupExtender ID="mpeRequestDecline" runat="server" PopupControlID="pnlRequestDecline" TargetControlID="btnDummyButton_ReqDecline"
BackgroundCssClass="modalPopup1" DropShadow="true" BehaviorID="mpe">
</cc1:ModalPopupExtender>
</ContentTemplate>
</asp:UpdatePanel>
Link buttons which triggers the modalpopup in aspx:
<ItemTemplate>
<asp:LinkButton ID="LinkButton3" OnClick="lnkCloseReleaseHL" runat="server"
Text="Close"></asp:LinkButton>
</ItemTemplate>
<asp:TemplateColumn HeaderText="Decline">
<ItemTemplate>
<asp:LinkButton ID="lnkDeclineHLRelease" runat="server" OnClick="lnkDeclineHLRelease_Click">Decline All</asp:LinkButton>
</ItemTemplate>
Code behind:
public void lnkCloseReleaseHL(object sender, System.EventArgs e)
{
udpModalReqClose.Visible = true;
string successMsg = "Request has been closed Succesfully.";
lblcloseSuccessOPR.Text = successMsg;
mpeClosedSuccess.Show();
}
protected void lnkDeclineHLRelease_Click(object sender, EventArgs e)
{
udpModalReqDecline.Visible = true;
string successMsg = "Request has been declined.";
lblRequestDecline.Text = successMsg;
mpeRequestDecline.Show();
}
If I do not set the Visible=False property in the aspx page, one of the ModalPopup is shown on the webpage, blank with the 'OK' button I have inserted in the popup.
Also, if I have just one UpdatePanel in my aspx page, the popup works perfectly fine without setting Visible property. Once I add another UpdatePanel below it, this problem occurs(screenshot in the link), where the panel with 'OK' button is displayed on page load.
Panel appearing on page with the 'OK' button
I tried searching for every possible solutions on the web but nothing has helped me. If someone can please guide me how I can resolve this, it would be of great help. I just want to know how I can make multiple UpdatePanels work without having this issue.

I'm not sure, but you can try using
style="display:none"
instead of
Visible="false"

Refreshing ListView in asp:webform using UpdatePanel

I have a listview that I want to update every 5 seconds or so, the update panel does refresh but to no effect.
<asp:Timer runat="server" ID="UP_Timer" Interval="5000" />
<asp:UpdatePanel runat="server" ID="Proc_UpdatePanel">
<ContentTemplate>
<asp:ListView ID="ListView1" runat="server"
DataKeyNames="procName"
ItemType="SerMon.RemoteProcess" SelectMethod="fetchFromQueue">
<EmptyDataTemplate>
<table>
<tr>
<td>No data was returned.</td>
</tr>
</table>
</EmptyDataTemplate>
<EmptyItemTemplate>
<td />
</EmptyItemTemplate>
<LayoutTemplate>
<table runat="server" id="table1" class="table table-striped table-hover ">
<thead>
<tr runat="server">
<th>#</th>
<th>Process</th>
<th>Status</th>
<th>Machine</th>
</tr>
<tr id="itemPlaceholder" runat="server"></tr>
</thead>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server">
<td>1</td>
<td>
<asp:Label runat="server" ID="lblId"><%#: Item.ProcName%></asp:Label></td>
<td>
<asp:Label runat="server" ID="Label1"><%#: Item.Procstatus%></asp:Label></td>
<td>
<asp:Label runat="server" ID="Label2"><%#: Item.mcName%></asp:Label></td>
</tr>
</ItemTemplate>
</asp:ListView>
</ContentTemplate>
</asp:UpdatePanel>
The whole page refreshes, yet the method to be called for populating the listview is not called. Where am I going wrong?

There are 2 different issues here.
First of all the Timer is outside the UpdatePanel, so of course it will do a full PostBack. Move the timer inside the UpdatePanel.
Second, you did not specify an OnTick event for the timer. Without it the Timer will just refresh the page.
<asp:UpdatePanel runat="server" ID="Proc_UpdatePanel">
<ContentTemplate>
<asp:Timer runat="server" ID="UP_Timer" Interval="5000" OnTick="UP_Timer_Tick" />
</ContentTemplate>
</asp:UpdatePanel>
Code behind:
protected void UP_Timer_Tick(object sender, EventArgs e)
{
//update the ListView
}

<asp:UpdatePanel > doesn't work inside a table <tr>?

I have a problem getting an <asp:UpdatePanel..> to work inside a <table>.. <tr> </tr> structure and I don't know why. When the UpdatePanel is commented out everything works fine, but when I un-comment the UpdatePanel the contents of the <tr> </tr> tag doesn't even show up in Visual Studio 2010. This content does display when I run the web page but the UpdatePanel doesn't work. Non of my other web pages in this project have this problem but, then again, I use <div>s instead of <table>s in them.
One other thing. The is in my MasterPage.
Here is my script:
<asp:UpdatePanel ID="W9UpdatePanel" runat="server" UpdateMode="Always">
<ContentTemplate>
<tr>
<td colspan="6">
<div class="branchSetupSectionTitle">W-9 Information:</div>
</td>
</tr>
<tr>
<td colspan="2">
<asp:Button ID="btnDownloadW9Pdf" runat="server"
Text="Download W-9" onclick="btnDownloadW9Pdf_Click" AutoPostBack="True" />
<%--<asp:RegularExpressionValidator ID="RegularExpressionValidator24"
runat="server" ControlToValidate="txtFirstPaymentAmount" Display="Dynamic"
ErrorMessage="The dollar amount you entered is in the wrong format."
ForeColor="Red" ValidationExpression="^\d+(\.\d\d)?$">*</asp:RegularExpressionValidator>--%>
<asp:CheckBox ID="chkW9FormSubmitted" runat="server" AutoPostBack="True"
oncheckedchanged="chkW9FormSubmitted_CheckedChanged"
Text=" I have submitted this W-9 Form" />
</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</ContentTemplate>
</asp:UpdatePanel>
</tr>
The event fires for both the button and the checkbox but the entire page is refreshed.
Thanks for your help.

UpdatePanel needs to render a div or span in order to function correctly. Since neither of these elements can be rendered between table rows, UpdatePanel does not have a placeholder to render the postback response html, and thus it doesn't work.
A workaround in your case may be to see which part of your page does not need to be inside the update panel and leave it outside. You could leave just the contents of <td colspan="2"> inside the UpdatePanel.

<asp:ScriptManager ID="scm" runat="server">
</asp:ScriptManager>
<fieldset>
<legend>Truck Master Entry Form</legend>
<asp:UpdatePanel ID="upd1" runat="server">
<ContentTemplate>
<table cellpadding="2" cellspacing="1">
<tr>
<td align="right">
Truck no :
</td>
<td align="left">
<asp:TextBox ID="truckno" runat="server" Width="120px" Height="20px" />
</td>
</tr>
<tr>
<td align="right">
Size :
</td>
<td align="left">
<asp:DropDownList ID="drptrucksize" runat="server" Width="120px" Height="20px" DataValueField="WEIGHT"
DataTextField="SIZE" OnSelectedIndexChanged="drptrucksize_SelectedIndexChanged"
AutoPostBack="true" />
</td>
</tr>
<tr>
<td align="right">
Type :
</td>
<td align="left">
<asp:TextBox ID="txttrucktype" runat="server" Width="120px" Height="20px" />
</td>
</tr>
<tr>
<td align="right">
Weight :
</td>
<td align="left">
<asp:TextBox ID="txtweight" runat="server" Width="120px" Height="20px" />
</td>
</tr>
<tr>
<td align="right">
</td>
<td align="left">
<asp:Button ID="btnsave" runat="server" Text="Save" Width="100px" Height="50px" />
<asp:Button ID="btncancel" runat="server" Text="Cancel" Width="100px" Height="50px" />
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>

The update panel need to be put outside the table. Look at
Mohammad Shahnawaz's code.

ValidatorCalloutExtender and ModalPopupExtender Issues on MasterPage

I have just created a website with a MasterPage. I have two conditions that will illustrate my problem:
Condition 1:
I have added a ModalPopupExtender on website.master. It has three fields and each field has a RequiredFieldValidator and a ValidatorCalloutExtender.
Condition 2:
I have a few different pages where you can click on a registration link. When you click the registration link, a registration form will appear. This form also has RequiredFieldValidators and ValidatorCalloutExtenders for each field.
Problem:
If I open a registration form and want to place my feedback, I click on the feedback button. The feedback modal popup displays. If I click on the submit button without filling the feedback form, it should give me the error in ValidatorCalloutExtender format on the ModalPopupExtender panel. However, it doesnt show me any error but the ValidatorCalloutExtender does show on the registation form along with respective validation.
<cc1:ModalPopupExtender CancelControlID="lnk_cancel" ID="popup_change_password" BackgroundCssClass="modalBackground"
runat="server" TargetControlID="ImageButton1" PopupControlID="panel_change_password">
</cc1:ModalPopupExtender>
<asp:Panel ID="panel_change_password" runat="server" Style="display: none; height: 400px;
width: 400px; padding-left:30px; background-repeat:no-repeat;" BackImageUrl="~/Images/background.gif">
<table cellspacing="0" cellpadding="0" border="0">
<tr>
<td colspan="3" valign="top">
<table cellpadding="0" cellspacing="0" width="400px">
<tr>
<td align="right">
<asp:ImageButton ID="lnk_cancel" runat="server" ImageUrl="Images/close.gif" Height="30px"
Width="30px" />
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="3">
<asp:Label ID="lbl_new_password" runat="server" Text="Your feedback is important to us."
CssClass="login_font1"></asp:Label>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
<tr>
<td>
<asp:Label ID="lbl_name" runat="server" Text="Name" CssClass="Label_Styles"></asp:Label>
</td>
<td>
:
</td>
<td>
<asp:TextBox ID="txt_name" runat="server" CssClass="Textbox_Styles"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
<tr>
<td>
<asp:Label ID="lbl_email" runat="server" Text="Email Address" CssClass="Label_Styles"></asp:Label>
</td>
<td>
:
</td>
<td>
<asp:TextBox ID="txt_email" runat="server" CssClass="Textbox_Styles"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
<tr>
<td>
<asp:Label ID="lbl_comment" runat="server" Text="Comments" CssClass="Label_Styles"></asp:Label>
</td>
<td>
:
</td>
<td>
<asp:TextBox ID="txt_comment" runat="server" CssClass="Textbox_Styles" Height="120px"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
</table>
</asp:Panel>

Put the above code in an UpdatePanel with UpdateMode="Conditional" and ChildrenAsTriggers="False".
So it will look something like :
<asp:UpdatePanel ID="sbsModalExtenderUpdatePanel" runat="server" UpdateMode="Conditional"
Visible="False" ChildrenAsTriggers="False">
<ContentTemplate>
<asp:Panel ID="StepByStepBookingPanel" runat="server" Enabled="false" EnableViewState="false"
Style="display: block" CssClass="mediumModalPopup" ScrollBars="Auto" Width="800px"
Height="300px" ViewStateMode="Enabled">
<div id="clientCoordDiv" runat="server">
<table id="StepByStepTable" runat="server">
etc...
</table>
</div>
</asp:Panel>
<ajax:ModalPopupExtender ID="mpeStepByStepBooking" runat="server" BackgroundCssClass="modalBackground"
PopupControlID="StepByStepBookingPanel" CancelControlID="BtnCancel" OnCancelScript="ClearStepByStepPopup"
TargetControlID="hdnStepByStepButton" DropShadow="true" BehaviorID="modalwithinput" />
<asp:CompareValidator ID="ClientCoordinatorCompareValidator" runat="server" ErrorMessage="Please select a Client Coordinator"
ControlToValidate="ddlClientCoordinator" Display="None" Operator="NotEqual" SetFocusOnError="True"
Type="Integer" ValueToCompare="0" ValidationGroup="SelectionRequired">
</asp:CompareValidator>
<asp:CompareValidator ID="CVOCoordinatorCompareValidator" runat="server" ErrorMessage="Please select a CVO Coordinator"
ControlToValidate="ddlCVOCoordinator" Display="None" Operator="NotEqual" ValueToCompare="0"
Type="Integer" SetFocusOnError="True" ValidationGroup="SelectionRequired">
</asp:CompareValidator>
<ajax:ValidatorCalloutExtender ID="CompareClientCoordinatorExt" runat="server" Enabled="True"
TargetControlID="ClientCoordinatorCompareValidator" BehaviorID="ClientValidatorExt">
</ajax:ValidatorCalloutExtender>
<ajax:ValidatorCalloutExtender ID="CVOCoordinatorCompareValidatorExt" BehaviorID="CVOValidatorExt"
runat="server" Enabled="True" TargetControlID="CVOCoordinatorCompareValidator">
</ajax:ValidatorCalloutExtender>
</ContentTemplate>
</asp:UpdatePanel>
This will keep the dialog up while you validate it. Unfortunately, I do not have the full solution since my validator messages are not displaying. So far, from what I am getting on the Net it is a problem with the Ajax library. Ugly!
Oh well, hope this helps someone...

FileUpload not working in update panel(modal popup extender)

i am developing web application and contain modal popup extender in which update panel made and it contain file upload control but file upload control not working in it.
This is my modal popup which contain fileupload control
and my modal popup source code
<cc1:ModalPopupExtender ID="AddNews" runat="server" PopupControlID="pnlPopUp1" BehaviorID="AddNews"
TargetControlID="btnNews" BackgroundCssClass="modalBackground">
</cc1:ModalPopupExtender>
<asp:Panel ID="pnlPopUp1" runat="server" CssClass="modalPopup" Height="450px" Width="660px"
Style="display:none; z-index: 100000">
<asp:UpdatePanel ID="Upanel1" runat="server">
<ContentTemplate>
<div>
<table cellpadding="0" cellspacing="0" width="100%">
<tr style="height: 35px;">
<td style="width:170px">
</td>
<td style="text-align: center">
<h1>
Add News</h1>
</td>
<td style="text-align: right">
<asp:ImageButton ID="ImageButton2" AlternateText="Close Image" runat="server" ImageUrl="~/images/delete_32i.GIF"
OnClientClick="return closePopup('News')" />
</td>
</tr>
<tr>
<td colspan="2">
<asp:Label ID="lblAddNewsError" runat="server" Text="" ForeColor="Red"></asp:Label>
</td>
</tr>
<tr>
<td>News Title:</td><td>
<asp:TextBox ID="txtNewTitle" Width="250px" runat="server" MaxLength="500"></asp:TextBox>
</td><td>
<asp:RequiredFieldValidator ID="rfvNewsTitle" runat="server"
ControlToValidate="txtNewTitle" ErrorMessage="*" ToolTip="Enter news title"
ValidationGroup="AddNews"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>Upload News Video</td><td>
<asp:FileUpload ID="FileUpload1" runat="server" />
</td><td><asp:RegularExpressionValidator ID="RegularExpressionValidator1"
runat="server" ControlToValidate="FileUpload1"
ErrorMessage="Invalid video File"
ValidationExpression="^([0-9a-zA-Z_\-~ :\\])+(.avi|.AVI|.wmv|.WMV|.flv|.FLV|.mpg|.MPG|.mp4|.MP4)$"
ToolTip="Only allow avi, wmv, flv, mpg, mp4 formats video files"
ValidationGroup="AddNews"></asp:RegularExpressionValidator></td>
</tr>
<tr style="height: 5px">
<td>
</td>
</tr>
</table>
<div>
<table cellpadding="0" cellspacing="0" width="100%">
<tr>
<td style="width: 675px">
<FCKeditorV2:FCKeditor ID="FCKAddNewsContent" basepath="~/fckeditor/" runat="server" Height="300px"></FCKeditorV2:FCKeditor>
</td>
<td valign="top">
</td>
</tr>
<tr>
<td style="text-align:right">
<asp:Button ID="btnAddNews" runat="server" Text="Add News"
onclick="btnAddNews_Click" ValidationGroup="AddNews" />
<asp:Button ID="btnClose"
runat="server" Text="Close" OnClientClick="return closePopup('News')"
CausesValidation="False" /></td><td></td>
</tr>
</table>
</div>
</div>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="btnAddNews" />
</Triggers>
</asp:UpdatePanel>
</asp:Panel>
as you see my one button also mentioned in postback trigger as i click on this button the result which i got is
can anyone help me out from this problem.

only one thing i just need in web.config and make it working
<httpRuntime executionTimeout="90" maxRequestLength="2000000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>
Point up my answer if you got your solution.

You can set Triggers on update panel. After that you can get file at server side.
<Triggers>
<ajax:PostBackTrigger ControlID="btnAddNews" />
</Triggers>
Hope it will help.