I have an asp.net button on the page. I am trying to do this:
$("#btn").click(function(e) {
e.preventDefault();
alert('hi');
}
But the alert never shows up. I have to use an ASP.NET button only and not a HTML one.
Try to have the method return false as well and in your buttons onclick you add the javascript. Like this:
$("#btn").click(function(e) {
e.preventDefault();
alert('hi');
return false;
}
or add it as an onclientclick function like this:
function ClickFunction() {
alert('hi');
return false;
}
<asp:Button OnClientClick="return Clickfunction();" />
Make sure you reference the ClientID of the button, not the "normal" ID.
$("#<%= MyControl.ClientID %>").click(function() {
alert(...);
return false;
}
Also make sure this is inside a document.ready() handler:
$(document).ready(function() {
$("#<%= MyControl.ClientID %>").click(function() {
alert(...);
return false;
}
});
Ok I got the answer over here
Using jQuery to Prevent ASP.NET Server Side Events from Occuring
I was missing the $(document).ready(function() . So silly of me!
Related
I have a TemplateField in a GridView in an UpdatePanel with a button called btnDelete. Rather than the standard OnClientClick="return confirm('Are you sure?')" I'd like to use jQuery Dialog.
So far, I'm able to set the jQuery using btnDelete.Attributes["onclick"] and setting the jQuery Dialog code in the code-behind. However, it posts back to the server in all cases before I have a chance to click "Confirm" or "Cancel".
Here is the HTML it produces:
<input type="submit" rel="Are you sure?" class="action-link delete" id="ctl00_c1_gvTransfers_ctl02_btnDelete" onclick="return function() {
$('#delete-transfer-confirm').dialog({
buttons: {
'Confirm' : function() { $(this).dialog('close'); return true; },
'Cancel' : function() { $(this).dialog('close'); return false; }
}
});
$('p.message').text($(this).attr('rel'));
$('#delete-transfer-confirm').dialog('open');
};" value="Delete" name="ctl00$c1$gvTransfers$ctl02$btnDelete">
What am I doing wrong that is causing this function not to block until either button is clicked?
Conversely, the standard confirm works just fine:
<input type="submit" class="action-link delete" id="ctl00_c1_gvTransfers_ctl02_btnDelete" onclick="try{if (!window.confirm('Are you sure?')){return false;};}catch(e1){alert("Unexpected Error:\n\n" + e1.toString());return false;};" value="Delete" name="ctl00$c1$gvTransfers$ctl02$btnDelete">
Thanks,
Mark
UPDATE:
Ultimately, I had to use UseSubmitBehavior="false" to get the name="" attribute to render. Then I had to override the OnClientClick, setting the value to "return;" so the default __doPostBack() doesn't get executed. Then I was able to wire up a .live() click handler, which invokes the __doPostBack() on Confirm:
$('input.delete').live('click', function(e) {
var btnDelete = $(this);
alert($(btnDelete).attr('name'));
e.preventDefault();
$('#delete-transfer-confirm').dialog({
buttons: {
'Confirm': function() {
$(this).dialog('close');
__doPostBack($(btnDelete).attr('name'), '');
return true;
},
'Cancel': function() {
$(this).dialog('close');
return false;
}
}
});
$('p.message').text($(this).attr('rel'));
$('#delete-transfer-confirm').dialog('open');
});
Check the selected answer for this question for an example: How to implement "confirmation" dialog in Jquery UI dialog?
A couple of notes:
Don't put your onclick functionality in an onclick attribute. One of the great benefits of jQuery is that it allows you to do Unobtrusive Javascript. Instead, do something like this:
$(function() {
$('.delete').click(function(e) {
e.preventDefault() //this will stop the automatic form submission
//your functionality here
});
});
Also, make sure that your dialog is instantiated outside the click event, so that it is initialized before the first click event happens. So, something like this would be your result:
$(function() {
$("#delete-transfer-confirm").dialog({
autoOpen: false,
modal: true
});
$('.delete').click(function(e) {
e.preventDefault();
$('#delete-transfer-confirm').dialog({
buttons: {
'Confirm': function() {
$(this).dialog('close');
return true;
},
'Cancel': function() {
$(this).dialog('close');
return false;
}
}
});
$('p.message').text($(this).attr('rel'));
$('#delete-transfer-confirm').dialog('open');
});
});
That should do the trick for you.
$(document).ready(function () {
$('#btnCancel').click(function (e) {
e.preventDefault();
$("<div><span><b>Are you sure you want to cancel this order?</b></span></div>").dialog({
modal: true,
draggable: false,
resizable: false,
width: 430,
height: 150,
buttons: {
"No": function () {
$(this).dialog("destroy");
},
"Yes": function () {
$("#btnCancel").unbind();
$(this).dialog("destroy");
document.getElementById('<%= btnCancel.ClientID %>').click();
}
}
});
});
});
Then in the Page Body
<asp:button id="btnCancel" runat="server" cssclass="button_major" text="Cancel" style="float: right"
onclick="btnCancel_ClickEvent" clientidmode="Static" />
I'd like to use jQuery UI's dialog to implement a confirm dialog which is shown when the user clicks a delete-link (implemented using an asp:LinkButton).
I'm using code as shown below (copied from the jquery ui documentation):
<!-- the delete link -->
<asp:LinkButton ID="btnDelete" runat="server" Text="Delete"
OnClick="btnDelete_Click" CssClass="btnDelete"></asp:LinkButton>
<!-- the confirm-dialog -->
<div id="dialog-confirm-delete" title="Delete?" style="display:none;">
<p>Are you sure you want to permanently deleted the selected items?</p>
</div>
<script>
$(document).ready(function () {
// setup the dialog
$('#dialog-confirm-delete').dialog({
autoOpen: false,
modal: true,
buttons: {
"Delete all items": function () {
$(this).dialog("close");
// ===>>> how to invoke the default action here
},
Cancel: function () { $(this).dialog("close"); }
}
});
// display the dialog
$('.btnDelete').click(function () {
$('#dialog-confirm-cancel').dialog('open');
// return false to prevent the default action (postback)
return false;
});
});
</script>
So in the click event handler, I have to prevent the default action of the LinkButton (the postback) and instead display the dialog.
My question is: how can I then invoke the default action (the postback) of the delete link to perform the postback in case the user clicked the "Delete all items" button in the dialog?
OK, here's my approach (it works, but it might not be the best solution):
$(document).ready(function () {
$('#dialog-confirm-cancel').dialog({
autoOpen: false,
modal: true,
buttons: {
"Delete all items": function () {
// invoke the href (postback) of the linkbutton,
// that triggered the confirm-dialog
eval($(this).dialog('option', 'onOk'));
$(this).dialog("close");
},
Cancel: function () { $(this).dialog("close"); }
}
});
$('.btnDelete').click(function () {
$('#dialog-confirm-delete')
// pass the value of the LinkButton's href to the dialog
.dialog('option', 'onOk', $(this).attr('href'))
.dialog('open');
// prevent the default action, e.g., following a link
return false;
});
});
If you're not doing anything more than confirming you can add an attribute to the button.
<asp:LinkButton ID="btnDelete" runat="server" Text="Delete"
OnClientClick="if(!confirm('Are you sure?'))return false;" CssClass="btnDelete"></asp:LinkButton>
If you look at the Project Awesome on Codeplex it has a generic implementation of a Confirm Dialog that you can inspect for your scope.
So you prevented the default action of the link(following the link), right? So adding location.replace('path/to/file'); after $(this).dialog('close'); would solve your problem.
Not sure I understood your question right though.
Try adding $("#yourformid").submit(); at this spot // ===>>> how to invoke the default action here.
According to the docs: "... the default submit action on the form will be fired, so the form will be submitted."
Edit
You can try to do something like this:
$('.btnDelete').click(function (event, confirmed) {
if (confirmed) {
return true;
} else {
$('#dialog-confirm-cancel').dialog('open');
// prevent the default action, e.g., following a link
return false;
}
});
And then in your delete all items function:
"Delete all items": function () {
$(this).dialog("close");
$('.btnDelete').trigger("click", [true]);
},
$('#dialog-confirm-delete').dialog({
autoOpen: false,
modal: true,
buttons: {
Cancel: function() {
$(this).dialog("close");
},
"Delete all items": function() {
$(this).dialog("close");
// ===>>> how to invoke the default action here
}
}
});
If you are using a LinkButton you can do this:
__doPostBack("<%= lnkMyButton.UniqueID %>", "");
I am creating an ASP.NET custom control.
I want to set the body onload event of the ASPX page where the control resides.
Please note I cannot rely on the body tag in the ASPX page having runat="server".
any ideas??
Cheers.
Inline javascript! Just incase you can't use jQuery
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function')
{
window.onload = func;
} else {
window.onload = function() {
if (oldonload) {
oldonload();
}
func();
} } }
addLoadEvent(initialize);
link to read http://www.webreference.com/programming/javascript/onloads/
Credits goto http://simonwillison.net/
If you include jQuery in your project you can use this:
jQuery(document).ready(function ()
{
// page load code here
});
You can run these multiple times on a page, ie handy within a control
Try this,
<script type="text/javascript">
window.onload = initialize();
function initialize() {
//your stuff
}
</script>
I have a need to check two unrelated conditions when the user clicks submit, and request user feedback for each.
I can get one jquery dialog up working great but I will sometimes need two in a row, and then have it complete the button event.
Here's the gist:
I have button
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
and then some Jquery checking a certain condition that if true pops up a dialog. If the dialog opens I return false so the original click event doesn't occur but in most case I want to let it pass through:
$("#<%=btnSubmit.ClientID %>").click(
function() {
if (Condition) {
$('#Dialog').dialog('open');
return false;
}
return true;
}
);
I'm not using the regular dialog buttons but have another asp:button that calls a different OnClick Event in the code-behind:
$("#Dialog").dialog({
bgiframe: true,
autoOpen: false,
height: 90,
width: 450,
modal: true,
close: function() {}
<div id="Dialog">
<asp:Button ID="Button1" runat="server" Text="OK" OnClick="btnDeleteSomethingThenSubmit_Click" />
<input type="button" value="Cancel" id="btnCancelDialog" />
</div>
Which is all great. Works anyway. But I also need another condition checked, with a different dialog but this time just a yes/no flag and I don't need to hit a server side event, so how can I get one to pop first, wait for response and set a value, pop the second, and then go to the OnClick event? Something like :
$("#<%=btnSubmit.ClientID %>").click(
function() {
if (OtherCondition) {
$('#Dialog2').dialog('open');
}
if (Condition) {
$('#Dialog').dialog('open');
return false;
}
return true;
}
);
Which obviously doesn't work.
Couldn't you have something like:
$("#<%=btnSubmit.ClientID %>").click(
function() {
var success = true;
if (OtherCondition) {
$('#Dialog2').dialog('open');
success = false;
}
if (Condition) {
$('#Dialog').dialog('open');
success false;
}
return success;
}
);
Basically, catch either dialog returning false in a variable, otherwise return true and allow the form to submit?
jQuery dialogs are non-blocking and don't behave like native JavaScript dialogs, which is why you cannot do
$("#<%=btnSubmit.ClientID %>").click(function() {
if (OtherCondition) {
$('#Dialog2').dialog('open');
}
if (Condition) {
$('#Dialog').dialog('open');
return false;
}
return true;
});
You need to use the close callback like this:
$("#<%=btnSubmit.ClientID %>").click(function() {
if (OtherCondition) {
$('#Dialog2').dialog('open', {
close: function() {
if (Condition) {
$('#Dialog').dialog('open', {
// Call some function here to report the status
close: function() {}
});
} else {
// Call some function here to report a different status
}
}
});
}
});
I am trying to attach an event handler to form.submit on asp.net rendered pages with no success. I want to intercept every postback, and doc. says that I should be able. Am I doing something wrong?
$(document).ready(function() {
$("form").submit(function() {
alert('Form submit');
debugger;
});
});
Don't know if you are still looking for it, but here is the solution I have. I don't think it works with event canceling if using, say, stopPropagation() but it will let you run some script before submitting the form.
<script type="text/javascript">
$(function () {
var oldSubmit = __doPostBack;
var newSubmit = function (eventTarget, eventArgument) {
alert('custom submit function');
return oldSubmit(eventTarget, eventArgument);
};
__doPostBack = newSubmit;
});
</script>
This is something I did on a legacy WebForm application:
//trigger jquery form submit event handlers on __doPostBack
$(function() {
var oldPostBack = __doPostBack;
__doPostBack = function() {
$("form").triggerHandler("submit");
oldPostBack.apply(this, arguments);
};
});
This allows you to wire "submit" events using jQuery the way you normally would:
$("#myForm").submit(function() { alert("submitted!"); });
Typical doPostBack hijacking, but only once. It triggers "submit" handlers on any form elements before doing the old postback. This is necessary because, while asp.net does call the onsubmit function attached to the form dom object, it doesn't look like jquery's events work that way.
asp.net webforms are generally enveloped in only one big form (hence the term web forms).
if I'm not mistaken, all links and submit buttons call __doPostBack manually, so it bypasses the calling form submit and delegates that responsibility to the __doPostBack function.
you would probably need to overwrite this function.
<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['aspnetForm'];
if (!theForm) {
theForm = document.aspnetForm;
}
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
//]]>
</script>
though I'm trying to understand your "debugger;" line in your function. perhaps it should be this?
$(document).ready(function() {
$("form").submit(function() {
alert('Form submit');
});
});