Develop Reference

ASP.NET show div on button click

am trying to show a loading div on button click, but it is not working at the moment.
Javascript :
<script type="text/javascript">
$(document).ready(function (e) {
$('#BtnSend').click(function () {
$('#<%= loading.ClientID %>').toggle("slow");
});
});
</script>
Div:
<div id="loading" class="Loading" runat="server" visible="false">
<div class="loadingImg">
<img src="../Images/loading.gif" alt="loading" />
</div>
</div>
Button:
<asp:Button ID="BtnSend" runat="server" Text="SEND"
onclick="BtnSend_Click" CssClass="pressbutton2" Height="36px" ClientIDMode="Static" />
the div is set to runat server so that I can change its visibility also through code.

Use the onClientClick for the asp button. Then make the jquery function that you ahve called BtnSend_Click
If you want to do it via Client side:
jQuery
function BtnSend_Click () {
$('#<%= loading.ClientID %>').toggle("slow");
}
ASP Button
<asp:Button ID="BtnSend" runat="server" Text="SEND"
onClientClick="BtnSend_Click" CssClass="pressbutton2" Height="36px" ClientIDMode="Static" />
If you want to do it via the server:
C#
protected void BtnSend_Click(object sender, EventArgs e){
loading.Visibility = 'visible' //not sure on syntax to show it in code behind off the top my head
}
ASP Button
<asp:Button ID="BtnSend" runat="server" Text="SEND"
onClick="BtnSend_Click" CssClass="pressbutton2" Height="36px" ClientIDMode="Static" />

The ASP.Net AJAX library has an UpdateProgress control that sounds like it would fit your needs.

I've tried adding in a prevent default, as the code as described below would postback before the loading div was shown otherwise.
<script type="text/javascript">
$(document).ready(function (e) {
$('#<%= BtnSend.ClientID %>').click(function (e) {
e.preventDefault();
$('#<%= loading.ClientID %>').toggle("slow");
});
});
</script>
Another thing I've noticed is you have set Visible="false":
<div id="loading" class="Loading" runat="server" visible="false">
This means the div doesn't exist as its not output from the server side. Look in the view source when the page loads, it wont be there and hidden, its just not there. Remove the visible="false" and use CSS to hide it to start off with.

Messagebox pop-in in asp, javascript not Recognized?

I've got an issue with a messagebox user control. I wish for a control which can be given a message and the user can dismiss with a click of a button, which can be inserted into many places.
I have applied the javascript into the messagebox control in a hope i can keep everything to do with the messagebox centralized, however when browsing to a page with the messagebox control added i get this error:
CS1061: 'ASP.components_messagebox_ascx' does not contain a definition for 'HideBox' and no extension method 'HideBox' accepting a first argument of type 'ASP.components_messagebox_ascx' could be found
The control is as thus:
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Messagebox.ascx.cs" Inherits="FosterNetwork.Components.Messagebox" %>
<script type="text/Javascript">
function HideBox() {
document.getElementById("PNL_Messagebox").setAttribute("visible", false);
}
</script>
<asp:Panel ID="PNL_Messagebox" runat="server">
<asp:Label ID="LBL_Message" runat="server" />
<asp:Button ID="BTN_Ok" Text="Ok" OnClick="HideBox()" runat="server" /> <!--Error happens on this line-->
</asp:Panel>
I'm fairly certain i've done this right but obviously i've done something wrong if it's not working. Any light on the situation at all would be grand.
Addendum: If i comment out the Button control the page loads fine, and the script loads fine too (Viewed page source)

The control ID's you're referencing are not the client ID's, but server ID's. So retrieve the 'ClientID' from the control in the JavaScript function and second, use the 'OnClientClick' property to show the JavaScript message.
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Messagebox.ascx.cs" Inherits="FosterNetwork.Components.Messagebox" %>
<script type="text/Javascript">
function HideBox() {
document.getElementById("<%= PNL_Messagebox.ClientID %>").setAttribute("visible", false);
}
</script>
<asp:Panel ID="PNL_Messagebox" runat="server">
<asp:Label ID="LBL_Message" runat="server" />
<asp:Button ID="BTN_Ok" Text="Ok" OnClientClick="HideBox()" runat="server" /> <!--Error happens on this line-->
</asp:Panel>

Onclick looks for a server side function, and not javascript. either, define your button as <input type='button' onclick='HideBox' or change the current code to:
<script type="text/Javascript">
function HideBox() {
document.getElementById("<%= PNL_Messagebox.ClientID %>").setAttribute("visible", false);
return false;
}
</script>
<asp:Button ID="BTN_Ok" Text="Ok" OnClientClick="return HideBox()" runat="server" />
returning false in OnClientClick, prevents the asp button from postback.
Edit: as Monty mentioned, your panel control's client id is not correctly set in your code.

Disable buttons onclick in asp wizard

I have an asp wizard on my page with three steps.
<asp:Wizard ID="wizardBestellen" runat="server" ActiveStepIndex="0" DisplaySideBar="False" onfinishbuttonclick="wizard_NextButtonClick" onnextbuttonclick="wizard_NextButtonClick" onpreviousbuttonclick="wizard_PreviousButtonClick">
<StartNavigationTemplate></StartNavigationTemplate>
<StepNavigationTemplate></StepNavigationTemplate>
<FinishNavigationTemplate></FinishNavigationTemplate>
<WizardSteps>
<asp:WizardStep runat="server" ID="step1" StepType="Start">
<uc1:control ID="uc1" runat="server" />
</asp:WizardStep>
<asp:WizardStep runat="server"ID="step2" StepType="Step">
<uc2:control ID="uc2" runat="server" />
</asp:WizardStep>
<asp:WizardStep ID="step3" runat="server" StepType="Finish">
<uc3:control ID="uc3" runat="server" />
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
Now every control has a next and a previous button which after the click validates your data and sends you to the next step. The buttons all look like:
<asp:LinkButton ID="bntPrevious" runat="server" CommandName="MovePrevious" CssClass="buttonOrange" CausesValidation="false"><span>Previous</span></asp:LinkButton>
<asp:LinkButton ID="btnNext" runat="server" CommandName="MoveNext" CssClass="buttonOrange" CausesValidation="true"><span>Next</span></asp:LinkButton>
So far it all works perfectly..
Now i wanted to disable the buttons after clicking on it and show a div with a loader image. So i created a div named divLoader and a javascript function which hides the div the buttons are in and shows the div with the loader.
function ToggleDiv(divButton, divLabel)
{
if (divButton.style.display == 'block')
{
divButton.style.display = 'none';
divLabel.style.display = 'block';
}
else
{
divButton.style.display = 'block';
divLabel.style.display = 'none';
}
}
But i can't get this to work. The ToggleDiv function works great in another situation, so thats not the problem.
I've tried calling the function from the OnClick attribute in the linkbutton but this gave me an error. I tried the OnClientClick, but this didn't work and i also tried setting the onclick attribute in the code behind, this also was a dead end.
Can anybody explain to me what i am doing wrong or is there another way to prevent users clicking the button twice?

Sounds like you're not getting the binding to work.
The first thing I would do is check the emitted control IDs by doing a view-source. Some implementation of the .NET framework add extra fluff to these control IDs, so can't guarantee that it will be the same as appears on the form.
Next, I would try some JavaScript late binding. If you have a JavaScript file, put it there. If not create one or add a JavaScript block to the foot of your form (create a new file for preference).
All this would be much easier with a JAvaScript lbrary such as jQuery, but for the moment lets assume you don't have one.
Add a window onload event handler
window.onload = function(){
//code to go here
}
Now add the click binding for your button:
window.onload = function(){
document.getElementById("***YOUR BUTTON ID***").onclick = function(){
ToggleDiv(this, document.getElementById("***YOUR LABEL ID***"));
}
}
I said this would be a little easer with jQuery, well, this is the equivalent implementation:
$(document).ready(function(){
$("#***YOUR BUTTON ID***").click(function(){
$(this).toggle();
$("#***YOUR LABEL ID***")).toggle();
});
});
The above sample removes the need for your ToggleDiv function entirely.

Trigger Jquery event from ASP.NET server-side code?

I have a simple JQuery enabled ASP.NET page:
<script>
$(document).ready(function() {
$("#accordion").accordion();
});
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div id="accordion">
<h3><a id="Accordion1" href="#">Accordion Panel 1</a></h3>
<div>
A form input...
<asp:Button id="btnSubmit" runat="server" onclick="btnSubmit_Click" />
</div>
<h3><a id="Accordion2" href="#">Accordion Panel 2</a></h3>
<div>
Some content...
</div>
</div>
</ContentTemplate>
</asp:UpdatePanel>
If you'll notice, I'm using an UpdatePanel also.
btnSubmit_Click event does something like this:
protected void btnSubmit_Click(object sender, EventArgs e)
{
//Some MySql INSERT, etc.
}
Now what I want to do is for server-side btnSubmit_Click to trigger JQuery to "click" Accordion Panel 2 (so it will open Accordion Panel 2 and close 1). How to do this?
UPDATE: Sorry guys I forgot to mention earlier that It's got an UpdatePanel

Oh well, I just used the "change the value of a hiddenfield after postback then let jquery read that hiddenfield" approach. Thanks guys!
Jquery:
var tag = $("#contentBody_hfTag1").val();
if (tag=="1") { $(".Accordion").accordion({ active: 1 }); }
else { $(".Accordion").accordion({ active: 0 }); }
.aspx
<asp:HiddenField ID="hfTag1" ClientIDMode="Predictable" Value="0" runat="server" />
C#
protected void btnMyButton_Click(object sender, EventArgs e)
{
hfTag1.Value = "1";
}

You can't. Jquery runs on the client, your handler is on the server. You will need to trigger the event on the client when the page reloads after the post back.

You can't do that as Jquery works on client side, from a server side event, as the page reloads. And the state of the accordion will be lost. So what you can do is, instead of making a post back, you can do the same work in a Jquery AJAX call on the button click to do whatever you want and then close the accordion 1 and show accordion 2.

<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate>
<i88:InlineScript runat="server">
<script type="text/javascript">
$('Accordion2').click()
</script>
</i88:InlineScript>
<asp:Button ID="cmd" runat="server" Text="Update" />
</ContentTemplate>
</asp:UpdatePanel>
You can put inlineScript which will get Executed every time you update the Panel.
You can also use jQuery.Trigger(); for other event's.

PostingBack from ModalPopup, but keeping it visible?

I have a ModalPopup that will contain a gridview and 4 fields to enter items into the gridview itself.
Is it possible to postback to the server and update the gridview while keeping the modal open?
When you submit the fields and the postback occurs the modal closes has anyone done this before? Someone mentioned a solution using jQuery, but this was long ago.

Wrapping the popup's content (i.e. not the popup itself!) in an UpdatePanel worked for me.
My popup content is a search panel with sortable/pageable grid of results. The UpdatePanel gave me the exact behaviour I require with no additional code.
Thanks to Patel Shailesh for the idea.
<asp:Panel runat="server" ID="PopupPanel" Height="650" Width="900" Style="display: none">
<asp:UpdatePanel runat="server" ID="UpdatePanel1">
<ContentTemplate>
<!-- popup content -->
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<ajax:ModalPopupExtender runat="server" ID="PopupExtender" PopupControlID="PopupPanel"
TargetControlID="PopupButton" />
<asp:Button runat="server" ID="PopupButton" Text="Popup" />

The key to doing this is going to be using AJAX of some flavor -- Microsoft.Ajax or jQuery Ajax. If the UpdatePanel is not working, then I'd suggest using jQuery to submit back to the server using AJAX. This would involve creating a WebMethod to accept the AJAX post on the server side and instrumenting the client-side with jQuery to send the request/receive the response. Without seeing your HTML it's a little hard to be very specific.
Basic idea:
$(function() {
$('#modalSubmitButton').click( function() {
$.ajax({
url: 'path-to-your-web-method',
dataType: 'json', // or html, xml, ...
data: function() {
var values = {};
values['field1'] = $('#field1ID').val();
...
values['field4'] = $('#field4ID').val();
return values;
},
success: function(data,status) {
... update page based on returned information...
}
... error handling, etc. ...
});
return false; // stop any default action from the button clicked
});
});

I am not sure if this would work, but try to put whatever inside the modalpopup in a UpdatePanel
Please if this works don't hate me after you release, I hate updatepanels too

A kind of ugly option is to force a postback when showing the modal popup in the first place and setting a ViewState["ModelPopupOn"] = true; and then check that on page load and finally postback again and set it to false/remove it from viewstate when closing the popup.
(these kind of issues are why I hate the ajax toolkit)

I was experimenting with the modalpopupextender, and find a ugly solution.
If the modal panel has a button that makes the postback to happen
<asp:Panel runat="server" ID="PopupPanel" Height="650" Width="900" Style="display: none">
<asp:Button ID="OkButton" runat="server" Text="OK" OnClick="OkBtn_Click" />
</asp:Panel>
If the OkBtn_Click in the code-behind has a call to:
System.Web.HttpContext.Current.Response.Write("<script></script>");
Then the modalpopupextender is not closed.
This happened too to this guy:
http://forums.asp.net/t/1591860.aspx