I have a ModalPopupExtender inside an UpdatePanel which opens an input form. The problem is when I click the "Edit" button (which is also inside the UpdatePanel) I want to fill the form with existing values using server side code. But it OnClick method of the button doesn't seem to work.
My question is: How can I make the serverside code run first, than show the edit form?
You need to show the ModalPopupExtender from server side.
First, link the ModalPopupExtender's TargetControlID to a dummy hiddenfield or a button with style="display:none" instead of the "Edit" button. I know it's sound stupid, but it's a know workaround.
Then make sure the asp.net the "Edit" button is set as a asyncpostbacktrigger if children as trigger is set to false.
Also set CausesValidation="false" to avoid the postback to be blocked by unrelated validators on the page.
Finally, At the end of "Edit" button's click event, call ModalPopupExtender.Show() to display the pop up.
Related
Here is the thing:
I have a Master Page, and a couple of other Web Forms. All of them invoke User Controls, and inside the User Controls, there is an Update Panel.
Now that I add a button in the Master Page (all the pages will need that button, that's why it is in the Master Page), I need that button to show a Popup. That's ok.
The problem is that when I click the button, the page rendered again. So I put the button inside an Update Panel and set it as an Async Trigger for the Update Panel.
(imagine something like that:
Master page{
update panel {
button
}
content place holder
}
)
Now the page does not render again, but still launch the Page Load, and that is a problem.
If a page takes 5 seconds to show, because it is loading the content, the button in the master page will take 5 seconds too, because it will load all again.
Does someone know something to fix that?
I assume it's an asp.net standard button like
<asp:Button ID="Button1" runat="server" Text="Button" />
So on click of this button it fires a postback event. But the button needs to show a popup only and if no server code processing is required, better to use
<input type="button" id="Button1" value="Button"/>
Remove UpdatePanel.
how stop postback on any button click. My page is reloading as soon as i click on reset button on the registration page, i want to reset the form without reloading the page itself.
You have two possibilities:
Simply set the attribute AutoPostBack="false" on your button or whatever control.
As an alternative you could also add the following javascript to the click event of the button :
onclick="return false"
This prevents the button from submitting.
Try following:
<asp:button runat="server".... OnClientClick="return false;" />
First you have to know about Sever Control and normal HTML control.
If you used Server Button Control then your Page reload on each click.
If you wan to stop it then you have to use AutoPostBack="false", using this your server side method calling is stop.
Otherwise use Normal HTML Button Control and use JavaScript to reset your form.
I have a website that uses the AJAX TabContainer and has several tab panels. Each tab panel consists of a customer user control with many controls on it. I need to be able to set the active tab whenever server-side button click event is executed. How would I go about accessing the TabContainer from the custom controls C# code behind?
My markup is structured like this:
<cc1:TabContainer ID="TabRoot" runat="server" Width="100%" CssClass="ajax__tab_yuitabview-theme" onActiveTabChanged="TabRoot_ActiveTabChanged"
OnClientActiveTabChanged="SetIndex" ActiveTabIndex="0" AutoPostBack="True">
<cc1:TabPanel ID="TabPatientRoot" runat="server" HeaderText="Patient">
<ContentTemplate>
<custom:Patient ID="PatientInfo" runat="server" Visible="False"></custom:Patient>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
It is necessary that the server side codes executes a SaveData function before the tab panel is changed because whenever the active tab changes it loads the information for the newly selected tab panel, thus losing any information that wasn't saved on the previous tab panel.
How can I accomplish executing the server side SaveData function, and then have access to TabRoot to change the active tab? Currently I was using a javascript function (in the OnClientClick for the save button) to set the active tab but it is being executed before the server-side SaveData function. This seems to be a problem for users in IE9, only.
try like this and refer this examples Ajax Control toolkit
TabRoot.ActiveTabIndex = 0; // set your active tab index to display.
Try setting ActiveIndex of tab inside your button postback event.
I have a button which right now is set as a type "submit". This calls the controller, execute some code and returns back to the view. When I use jquery to hide the button, I see that when I click on the button, what I have hides the button but as soon as the view is returned, the button is not hidden no more. Whereas with type "button", when I click the button, this hides the button but doesnt execute the code in the controller. Is there a way to hide the type "submit" button so when the view returns, the button is still hidden?
$('#btnAdd').click(function() {
$('#btnAdd').hide();
});
<input type='submit'> creates a button that submits a form to a server and triggers your server code. If you want the button hidden when the page comes back, you need to add logic to your page to do that. How you do this will depend on your server technology (php, .net, etc.).
The reason the behavior with <button> is different is that <button>s don't submit the form (unless you add more code to make them do that)...so the above mentioned stuff never happens. It's not so much that a <button> stays hidden as much as the page never changes/reloads. If you added code to the <button> to make it refresh the page, it'd reappear, too.
The button is shown because the page is newly displayed after submiting the form. Your "old" page, where clicked and hid the button is history.
What do you want?
Pressing a button, do something on serverside, do not change your current page:
Use a button of type button, use ajax to call the server side.
Or use a button of type submit and do what Pablo said http://en.wikipedia.org/wiki/Post/Redirect/Get on serverside.
Pressing a button, do something on serverside, give user feedback:
Use <form method="post" to markup your form. Use a submit button to call the server side. On serverside hide the submit button, if it is called by method post (calling a page with link or typing it into the address field is calling it with method = get).
What is the difference between type submit and type button?
A submit button works without javascript to send some input to serverside. The surrounding form is send to the server and the response is rendered in browser.
A button button needs a javascript onclick handler, a javascript function. The onclick handler is called when the user pressed the button.
Since the page will be reloaded upon pressing the submit button, the button will reappear. One quick and dirty to get what you want is...
First, create a hidden field
<input type="hidden" id="hidden" value="" />
Then, when you press submit, in a click event for submit button, do something like this..
$('#submit').click(function() {
$('#hiddenField').val("1");
$('#form').submit();
return false;
});
Now in your controller, use the value of hiddenField of pass some variable to the view which can be used like this...
<?php if($hidden == "1"): ?>
<input type="submit" id="submit" value="Submit" />
<?php endif; ?>
As far as the button not submitting the form is concerned, it won't submit the form, until you submit the form yourself on the click event of button. Something like this...
$('button').click(function() {
$('#form').submit();
});
Of course, as I mentioned this is a quick and dirty way to implement the function you want, there are better ways - using AJAX, also the implementation can change depending on what server side language you use (I used php over here).
When your form is submitted and your controller process the data, if certain criteria is met, you can set a temporary session variable or a cookie in server side code. So, basically the page will check for this variable on every page load. Example in PHP:
if( empty($_SESSION['temp']['hideSubmitButton']) ) {
$submitButton = '<button type="submit">Normal Button</button>';
} else {
$submitButton = '<button type="submit" disabled="disabled">Disabled Button</button>';
// or $submitButton = '';
}
But then you have to decide when to unset() the $_SESSION['temp'] or $_COOKIE['temp'] variable.
I have an updatepanel,a modal popup extender inside that and an image button to open the pop up(it has not any click event). The 'div' for the modal pop up is outside the updatepanel. In the modal pop up the records come in a table with a link in each table row.When the link is clicked,a javascript function causes a hidden control to postback and fetch values from database.First time it is working fine,but next time the image button(TargetControlID for modal pop up extender) does not work and it is causing a postback and loading the page.Help plz...
Thanks in advance.
Mohak
Are you using myLink.ClientID or did you hardcoded the ID of the link in the Javascript function?
The ID of the link is probably changed when doing the first postback, the second time ASP.NET has generated a new ID (not visible in the HTML because of the AJAX-request) for your link and this doesn't match anymore with the ID in your Javascript function.
The solution would be to use myLink.ClientID