I have a asp.net button and I am using OnclientClick to close the window
<asp:Button ID="btnCancelSomething" runat="server" class="type-button"
Text="Cancel" OnClientClick = "Javascript:self.close()"
onclick="btnCancelSomething_Click"/>
the onclick event does nothing and I am planning to remove it. However, when I click the button the first time it is loading the page again. I click the button again then the script is fired.
How to make the window close the first time?
If the button isn't going to have any server-side functionality behind it anyway, why make it an asp:Button at all? A regular button will do the trick just fine:
<input type="button" value="Cancel" class="type-button" onclick="self.close()" />
That way it's purely client-side, since that's all the functionality that's needed anyway. It won't cause any "post-back" unnecessarily.
You could even take it a step further and break apart markup from functionality:
<input type="button" value="Cancel" class="type-button" id="cancelButton" />
Then in a script tag elsewhere, or in a separate file:
$('#cancelButton').click(function() {
self.close();
});
(Of course, this example assumes jQuery. But then what doesn't? The separation of markup and functionality if the key point here, though. How you achieve it, even how you identify the element with an id as in my example or some other way, is up to you.)
Related
I have the following code in my aspx file:
<button type="button" id="btnAskQuestion" runat="server" onserverclick="btnAskQuestion_Click">Ask Question</button>
I've tried every combination of onclick="return false;" and onclick="preventDefault()" I can think of, including putting them in the javascript function that gets called. Everything I try has one of two results: either I get a postback, or the server side code (btnAskQuestion_Click) never executes.
Any idea what I might be doing wrong?
You cannot execute server-side code this way, using onserverclick causes postback.
If you wish to prevent full page refresh and still execute server-side code, you have to call a client-side JS function via onclick and execute an AJAX call from there.
Another alternative is to use your button as a trigger for UpdatePanel - this way only partial postback will be performed.
Try using the property UseSubmitBehavior="false" in the button markup.
or you can use a "trick" :
Markup
<button onclick="myFunction()">Click Me!</button>
<div style="display:none">
<asp:Button runat="server" id="btnButton" .../>
</div>
js
function myFunction()
{
if (true statement)
$("[id$=btnButton]").click();
else
alert("false");
}
What this does is that you handle stuff with normal markup and do the logic using js. And you can trigger a click of the button that do something in the server.
There're OnClick, that fires on server and OnClientClick that fires on client browser. You should do this:
<asp:Button ID="btnAskQuestion" runat="server"
OnClick="btnAskQuestion_Click"
OnClientClick="return myfunction();">Ask Question</asp:button>
If myFunction returns true, then you will have a postback to the server.
My answer is appropriate only for ASP:Button, not the button control you are working with. Given the choice, I'd switch to ASP:Button.
You're looking for OnClientClick. If you put your JavaScript code there, it will kill the PostBack before it can hit the server.
On the other hand, if you're looking to execute server code without a PostBack, that's impossible. The PostBack is what triggers the server to act.
I want to use an asp.net button to launch an outlook window using the following html.
<a href="mailto:sample#website.com?subject=Insurance Text">
What do I need to do to file html code from my onClick event?
Try this
<asp:Button runat="server"
ID="btn"
OnClientClick="document.location = 'mailto:sample#website.com?subject=Insurance Text'; return false;"
Text="Mail" />
There are two approaches. If you want the standard button, you could use something like this:
<asp:Button ID="MailToButton"
Text="Send Email"
OnClientClick="javascript: navigate('mailto:blah#blah.com'); return false;"
runat="server" />
EDIT 2: Never mind about the UseSubmitBehavior property - I was incorrect. You'll just have to use return false;. Apparently ASP.NET does not render a regular non-submit button. How to disable postback on an asp Button
If you want an anchor tag, you can just use the NavigateUrl property of the Hyperlink tag:
<asp:HyperLink ID="MailToHyperlink"
Text="Send Email"
NavigateUrl="mailto:blah#blah.com"
runat="server" />
You cannot launch Outlook from the standard click event in the code behind, however. The code behind click event occurs on the server, not on the client's machine, so whatever you do it needs to happen on the client's machine either through standard HTML or through javascript.
Why an ASP.NET button?
Just use a simple HTML button.
They are plenty of example on the web. This one should work: using mailto button click event
I have a form that currently uses an control to submit a form. Everything works perfectly. So now the new requirement is for the "submit' button to be a link. Changing it to a LinkButton control, without changing a SINGLE other thing, breaks the validation.
There is a bit too much code to post in a SO question and I know there's a bit of a lack of detail here, but is there any reason why a LinkButton wouldn't fire ASP.NET validation the same way a Button control would? In theory, they should both operate exactly the same, no?
The current submit button:
<asp:Button ID="btnSubmit" TabIndex="9" Text="Send" ValidationGroup="Forward" runat="server" />
The new submit button:
<asp:LinkButton ID="btnSubmit" TabIndex="9" Text="Send" ValidationGroup="Forward" runat="server" />
The Link button should fires the validation the same way a normal button does, my concerns in your case would be the following:
make sure these is nothing in the server side code stopping this.
make sure in the javascript code there is nothing stopping the "
ASP.NET controls that fire validation has a property called CauseValidation
Be sure all controls should fire validation, has this property set to True
Add attribute CauseValidation="True" to your control but if you want to fire this at particular line at code behind you can use validate the form by the following code:
FormID.Validate();
I know this is old but it has never answered. Did your validator have a "controlTovalidate"? Currently it would appear as if the validator was not firing but in reality it is. It just does not have anything that it is 'watching'. Hope if anyone reaches this thread that this helps even if it is just a little bit.
I was unable to determine the cause of this issue but was able to solve it:
I set the CausesValidation="false" and added at the top of the onclick event this.Validate(linkButton.ValidationGroup) this allows the event to get to the code behind and validation to occur.
I'm using ASP.NET and I have a save button on webform. When that save button is clicked (ONCE) and I'm using IE8 the event handler is executed twice. If I use compatibility mode it works just fine. In FF everything works just fine. I tested IE8 on both Vista and windows 7 and get the same behavior. IE7 works just fine. Just curious is anyone has had a similar issue.
P.S. I am using an advanced layout system which positions and styles the controls based on a layout definition, so it isn't just a standard throw controls on a page setup.
We are using onserverclick on a button tag instead of using an asp.net button. The solution was to set the type of the button to "button". Before no type was set and I think it was defaulting to submit.
Changed
<button id="button1" runat="server" onserverclick="button1_OnClick" />
To
<button id="button1" runat="server" type="button" onserverclick="button1_OnClick" />
Now I do not get the double post back in IE8.
I just fixed a bug with similar symptoms which was caused by two form.submit() calls being made in the client-side javascript event handler for the button.
It appears the second form.submit() was being ignored by other browers but executed in IE8.
I just found a solution to a similar problem I was having troubles with.
Since none of the previous solutions seemed to help me I thought I'd post my own solution.
The problem:
When using an asp button on a webform and using the OnClientClick to run a custom postback mechanism. The postback seems to happen twice (the second time without viewstate being applied)
e.g. :
function ok(){
docustompostbackthing();
}
<asp:Button runat="server" ID="btnOk" Text="Ok" OnClientClick="ok();" cssClass="btn"/>
The solution:
Add a "return false;" after the js function call in the button's OnClientClick.
Adding it in the function itself doesn't do the trick.
e.g. :
function ok(){
docustompostbackthing();
}
<asp:Button runat="server" ID="btnOk" Text="Ok" OnClientClick="ok();return false;" cssClass="btn"/>
Please look at the html as it is rendered on the page:
Every time it's present
<img src=""/>
double postback can happen, for some browser...
If this is the trouble, you can resolve it setting a default, blank, image for every button
<asp:ImageButton ImageUrl="~/Images/blank.gif"...
Just to add to the number of solutions.
It's not just OnClientClick that has issues, the OnClick event does a very similar thing in IE8 as well.
<asp:Button runat="server" ID="btnOk" Text="Ok" OnClick="ok();" cssClass="btn"/>
Can be updated to the following to avoid the second event being fired off.
<asp:Button runat="server" ID="btnOk" Text="Ok" OnClick="ok();return false;" cssClass="btn"/>
I was using jquery(formobj).trigger(submit) this was changed to
jquery(formobj)[0].submit()
Note I am calling submit directly on the form instead of the jquery method
hope this helps someone
I had this same issue happening in IE 11 and managed to fix it by adding type="button" to the button control.
does anyone know how to use jquery modal dialog in asp.net pages?
http://jqueryui.com/demos/dialog/
I've tried creating a simple aspx page, pasted code from the example (http://jqueryui.com/demos/dialog/), it almost works. The dialog briefly shows up and then disappears. It seems that the page is doing a postback. I'm not sure how to stop it, so that the modal dialog stays up.
I've been using jqModal for modal dialogs. I've set it up to use a standard HTML input button to trigger the dialog, and then you can put a regular asp.net button or other controls inside of the hidden div.
Hope this helps.
I assume you have something like:
<asp:Button ID="popupButton" OnClientClick="showModalPopup();" Text="Click me" runat="server" />
I would try adding "return false;" to the OnClientClick property of your Button:
<asp:Button ID="popupButton" OnClientClick="showModalPopup(); return false;" Text="Click me" runat="server" />
Or if you don't need to access the button in code-behind, simply use a standard HTML button and set it's onclick event attribute:
<button onclick="showModalPopup();">Click me</button>