Develop Reference

Panel not displayed in UpdatePanel

<form runat="server" id="from1">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<script src='https://www.google.com/recaptcha/api.js'></script>
<asp:Panel runat="server" ID="pnlSiteQuestions">
>>>>> CONTROLS removed for brevity <<<<<
<asp:Button ID="btnContinue" runat="server" Text="Continue" OnClick="btnContinue_Click" ValidationGroup="Questions" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<asp:Panel ID="pnlNotRequired" runat="server" Visible="false">
Sorry you do not qualify.
</asp:Panel>
<asp:Panel runat="server" ID="pnlAdditionalDetails" Visible="false">
<asp:ValidationSummary runat="server" ID="ValidationSummary1" />
Name
<asp:RequiredFieldValidator runat="server" ID="ValidatorName" ControlToValidate="ContactFormNameTextBox" ErrorMessage="Name is required" CssClass="ErrorClass">Required</asp:RequiredFieldValidator>
<asp:TextBox runat="server" ID="txtName" />
<div class="g-recaptcha" data-sitekey="ABC123"></div>
<asp:Button runat="server" ID="button1" Text="Confirm" OnClick="button1_Click" />
</asp:Panel>
</form>
I have the above form and decided to add an update panel. When a user clicks Continue, it goes to a database and determines if the user qualifies. If not pnlNotRequired message is displayed otherwise pnlAdditionalDetails is displayed.
Everything is/was working until i added the update panel. So removing the UP has everything working.
I tried adding a trigger but i didnt fully understand how it should be configured as i dont completely understand why this is occurring?
No Javascript errors listed either. Anyway to overcome this issue?

Update panel should cover all panels. Add property to update panel "UpdateMode='Conditional'" than add trigger block

OnSelectedIndexChanged not working within the asp:updatePanel

I have a dropdown in which list of countries will be listed.During the select OnSelectedIndexChanged event country code such as +91 will be shown in a textbox. The dropdown should be in <asp:Update panel> tag and the update panel just working fine. OnSelectedIndexChanged event also working in the code behind. but the problem is the country code value not displayig in the textbox.
Here is my code..
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:DropDownList
runat="server"
ID="ddl_country"
AutoPostBack="true"
OnSelectedIndexChanged="ddl_country_SelectedIndexChanged">
</asp:DropDownList>
<asp:RequiredFieldValidator
ControlToValidate="ddl_country"
ID="reqCountry"
ValidationGroup="req"
class="validation-msg"
ErrorMessage="Please select a country"
InitialValue="0"
runat="server"
Display="Dynamic">
</asp:RequiredFieldValidator>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger
ControlID="ddl_country"
EventName="ddl_country_SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
<asp:TextBox runat="server" ID="text_countrycode"/>

text_countrycode is outside any update panel in the code above. So it's in the form and the entire form needs to post back for this to change it's text.
You're probably using Updatepanels because you don't want the entire form to flash and post back.
Changing the dropdown list doesn't refresh the entire page because it's in an Update Panel. If you want the Textbox to be updated without an whole page post back, put it in it's own updatepanel and trigger it from the first one.
Or even easier, just put them together in the same one.

Add Textbox Control Inside the <ContentTemplate>.
Try this code :
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:DropDownList runat="server" ID="ddl_country" AutoPostBack="true"
OnSelectedIndexChanged="ddl_country_SelectedIndexChanged"></asp:DropDownList>
<asp:RequiredFieldValidator ControlToValidate="ddl_country" ID="reqCountry"
ValidationGroup="req" class="validation-msg" ErrorMessage="Please select a country"
InitialValue="0" runat="server" Display="Dynamic">
</asp:RequiredFieldValidator>
<asp:TextBox runat="server" ID="text_countrycode"/>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ddl_country" EventName="ddl_country_SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>

TextBox OnTextChanged / PostBack not working

My problem is that I can't seem to get my textbox to fire the OnTextChanged event. I also checked and it doesn't seem like it is doing an autopostback despite the fact that it is set to true.
Basically, I am trying to validate the text in the textbox and either enable or disable a button based on the validation status.
Here's my code:
<asp:Panel ID="panelAccessControl" runat="server" Visible="false">
<asp:Panel ID="panelAddMileageRate" runat="server" BorderWidth="2" >
<h2>Add Mileage Rate</h2>
<asp:ScriptManager ID="scriptManagerMileageRate" runat="server" />
<asp:UpdatePanel ID="updatePanelAddMileageRate" runat="server">
<ContentTemplate>
<p>
Purpose:
<asp:DropDownList ID="ddlAddPurpose" runat="server"
AutoPostBack="true" Width="200px"></asp:DropDownList>
<br />
Country:
<asp:DropDownList ID="ddlAddCountry" runat="server"
AutoPostBack="true" Width="200px" >
</asp:DropDownList>
<br />
Effective Date:
<asp:Calendar ID="calAddEffectiveDate" runat="server">
</asp:Calendar>
<br />
Mileage Rate:
<asp:TextBox ID="txtAddMileageRate" runat="server"
AutoPostBack="true" Width="200px"
CausesValidation="true"
ontextchanged="txtAddMileageRate_TextChanged">
</asp:TextBox>
<asp:RegularExpressionValidator
ID="validatorAddMileageRate"
ControlToValidate="txtAddMileageRate" runat="server"
SetFocusOnError="true"
ErrorMessage="Only Numbers allowed"
ValidationExpression="^\d{1,20}(\.\d{0,4})?$">
</asp:RegularExpressionValidator>
</p>
</ContentTemplate>
</asp:UpdatePanel>
<p>
<asp:Button ID="buttonAddSecurityGroup" runat="server"
Text="Submit" onclick="buttonAddSecurityGroup_Click" />
</p>
</asp:Panel>
<asp:Label ID="lblStatus" runat="server" Text=""></asp:Label>
</asp:Panel>
The text box in question is txtAddMileageRate.

Set the EventName property for your txtAddMileageRate AsyncPostBackTrigger to TextChanged.
Add following codes inside your update panel and outside of ContentTemplate
<Triggers>
<asp:AsyncPostBackTrigger ControlID="txtAddMileageRate"
EventName="TextChanged" />
</Triggers>
Other sugguestion:
Have you tried looking at the AutoComplete (http://www.asp.net/ajax/ajaxcontroltoolkit/samples/autocomplete/autocomplete) control that is part of the AjaxControlToolKit? Its behaves the same way you want your solution to behave.

Page jumps to the top of the page even when using an Update Panel

I'm running into a bit of an issue. I have some asp.net controls wrapped in an update panel, but when I click the submit button it jumps to the top of the page. I've read a bunch of posts on here, and they either require use of some javascript or say set the MaintainPagePostion to "true" in the page directive. I tried setting it to true, that did not work. I really don't want to use a javascript script to accomplish this either. I was under the impression that this is one of the benefits to using an update panel. However, the part that I find most confusing, is it used to not do this. I don't remember changing anything on the website that would have caused this. Any help with this problem is appreciated. Thanks.
Here is the code I'm using.
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Panel ID="pnlEmailStuff" runat="server">
Name: <asp:TextBox ID="txtName" runat="server" Width="202px"></asp:TextBox><br />
Email: <asp:TextBox ID="txtEmail" runat="server" Width="203px"></asp:TextBox><br />
<span style="font-size:12px; font-weight:normal; margin-left:55px;">**Please double check email**</span><br />
Message:<br />
<asp:TextBox ID="txtMessage" runat="server" Width="370px" TextMode="MultiLine" Font-Names="Tahoma" Font-Size="Small" Height="75px"></asp:TextBox><br />
<asp:Label ID="lblEmailError" runat="server" Text="" Font-Size="Small" ForeColor="Red"></asp:Label>
<asp:ImageButton Height="25px" Width="60px" CssClass="EmailSubmit" ImageUrl="Images/MailingListBtnSubmit2.png" ID="btnSubmit" runat="server" onclick="btnSubmit_Click"/>
</asp:Panel>
<asp:Panel ID="pnlThankYou" runat="server" Visible="false">
<p style="text-align:center; font-size:30px;">Thank you!<br /><span style="font-size:20px;">Your Email has been sucessfully submitted.</span></p>
</asp:Panel>
</ContentTemplate>

You can do it in 4 ways :
From Code-behind - Page.MaintainScrollPositionOnPostBack = true;
From Page Directive - MaintainScrollPositionOnPostback="true"
From Web.config - <pages maintainScrollPositionOnPostBack="true" />
Using Javascript. You can use the code from following link. It worked for me -
http://weblogs.asp.net/andrewfrederick/archive/2008/03/04/maintain-scroll-position-after-asynchronous-postback.aspx

I think, it's not jump to the top of the page. It's refreshing the page. What's your update panel's UpdateMode? Is it Conditional? If it's conditional, check trigger. ControlID should be button ID and EventName='Click'. Then check the area of Update Panel .
Sample Code Here :
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="pnlEmailStuff" runat="server">
Name: <asp:TextBox ID="txtName" runat="server" Width="202px"></asp:TextBox><br />
Email: <asp:TextBox ID="txtEmail" runat="server" Width="203px"></asp:TextBox><br />
<span style="font-size:12px; font-weight:normal; margin-left:55px;">**Please double check email**</span><br />
Message:<br />
<asp:TextBox ID="txtMessage" runat="server" Width="370px" TextMode="MultiLine" Font-Names="Tahoma" Font-Size="Small" Height="75px"></asp:TextBox><br />
<asp:Label ID="lblEmailError" runat="server" Text="" Font-Size="Small" ForeColor="Red"></asp:Label>
<asp:ImageButton Height="25px" Width="60px" CssClass="EmailSubmit" ImageUrl="Images/MailingListBtnSubmit2.png" ID="btnSubmit" runat="server" onclick="btnSubmit_Click"/>
</asp:Panel>
<asp:Panel ID="pnlThankYou" runat="server" Visible="false">
<p style="text-align:center; font-size:30px;">Thank you!<br /><span style="font-size:20px;">Your Email has been sucessfully submitted.</span></p>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>

Have you specified the triggers in the update panel? If you specify the triggers in the triggers section then the update panel will update without jumping on top.Also you need to give updatemode = "conditional". It can be done like this:
<asp:UpdatePanel ID="ex" runat="server" UpdateMode="Conditional">
<ContentTemplate>
//your controls here
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="yourbuttonid" />
</Triggers>
</asp:UpdatePanel>

Well thank you to everyone that gave me suggestions. As it turns out the Page Routing is what caused this issue. So all I had to do to get it working was add and ignore line for that page in my RegisterRoutes code block:
void RegisterRoutes(RouteCollection routes)
{
routes.Ignore("Mobile");
routes.Ignore("Booking.aspx*");//<---- This Fixed it.
routes.MapPageRoute("Gallery", "Gallery/{Name}", "~/Gallery.aspx");
routes.Ignore("*");//<---- This is better for me. It acts as a catch all.
}
This helped me solve the issue: http://forums.asp.net/t/1743640.aspx
EDIT
I added the "routes.Ignore("");" code to it to act as a catch all, so I really don't need to ignore "Booking.aspx" specifically. Keep in mind though the order is important here. The Ignore("") needs to be the last one or else none of the other routing will work.
Thanks again Everyone.

Please try PageRequestManager handlers
<script>
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function EndRequestHandler(sender, args) {
try {
sender._controlIDToFocus = null;
}
catch (e) {
}
}
</script>

I was stuck for a few hours with a similar problem. I was convinced the problem was the UpdatePanel but it ended up being the defaultfocus & defaultbutton attributes in the form tag that was causing the page to jump up to focus the first textbox at the top of the page.
<form id="form1" runat="server" defaultbutton="buttonId" defaultfocus="textboxId">
This is something else to look at when facing this kind of issue.

asp.net Disable Button after Click while maintaining CausesValidation and an OnClick-Method

.aspx
<asp:TextBox ID="txtInvite" Width="170px" Height="20px" runat="server"
Font-Size="Small" ></asp:TextBox>
<AjaxToolkit:TextBoxWatermarkExtender ID="tbexInvite"
runat="server" SkinID="skinTextBoxWatermarkExtender"
TargetControlID="txtInvite" WatermarkText="Email"></AjaxToolkit:TextBoxWatermarkExtender>
<asp:RequiredFieldValidator ID="rfvInvite" runat="server"
Display="None" ValidationGroup="Inivitation" SetFocusOnError="true"
ControlToValidate="txtInvite" ErrorMessage="Enter Email."></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="regExpInvite" runat="server"
Display="None" ValidationGroup="Inivitation" SetFocusOnError="true"
ValidationExpression="\s*\w+([-+.]\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*\s*"
ControlToValidate="txtInvite" ErrorMessage="Invalid Email Format."></asp:RegularExpressionValidator>
<div class="ButtonLogin" style="margin-top:-27px;margin-right:143px;_margin-right:105px;">
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
<ContentTemplate>
<asp:Button ID="btnInvite" runat="server" CssClass="cssLoginButton blue" Text="Invite" ToolTip="Invite" ValidationGroup="Inivitation" CausesValidation="true" onclick="btnInvite_Click" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1" DisplayAfter="0">
<ProgressTemplate>
<asp:Image ID="Image1" ImageUrl="~/App_Themes/Lifetrons/images/progressbar.gif" AlternateText="Processing" runat="server" />
</ProgressTemplate>
</asp:UpdateProgress>
Page_load Code
.CS
this.btnInvite.Attributes.Add("onclick", "this.disabled=true;" + Page.ClientScript.GetPostBackEventReference(this.btnInvite, "").ToString());
I want to disable button after clicking on it with maintaining validation and Onlick method. I refer to this question my problem is same like this question but I haven't solve my problem. How can I solve?

There is no need to mess around with your code-behind Page_Load event. In your button control, just add the following snippet:
OnClientClick="if(Page_ClientValidate('Inivitation')){this.disabled=true;}"
So that your button looks like
<asp:Button ID="btnInvite" runat="server" CssClass="cssLoginButton blue" Text="Invite"
ToolTip="Invite" ValidationGroup="Inivitation" CausesValidation="true"
onclick="btnInvite_Click" OnClientClick="if(Page_ClientValidate('Inivitation')){this.disabled=true;}" />

You should be able to disable the button using the Button_Click method. Make your first line something like this:
Button.Enabled = False;
There is a problem with this method though. If the page loads too quickly or the code freezes it will not disable the button properly. Just remember to re-enable the button at the end of the method if the validation fails or times out.
Another method you may try is to hide it using CSS. I am a big fan of this because it always works and it is very simple. You need a technology like jQuery where you can add classes on the fly. You can use the AddClass and RemoveClass API in jQuery to add/remove CSS classes at runtime. Take a look here. http://jqueryui.com/addClass/

you can use Like this
<asp:Button ID="btnInvite" runat="server" CssClass="cssLoginButton blue" Text="Invite" ToolTip="Invite" ValidationGroup="Inivitation" CausesValidation="true" UseSubmitBehavior = False"onclick="btnInvite_Click" />