I've updated my .Net web application to use Framework 4.5, after the update, all the input buttons (not asp:Buttons), have stopped firing the onclick javascript code, this is only happening on those buttons that are inside a user control (.ascx).
Just for the record, user controls are neither being loaded dinamically nor inside update panels.
My buttons look like this
<input id="cb" onClick="myfunc()" type="button" value="Close" />
My user controls are included to the page as follows
<cc:actionbar id="theActionBar" runat="server"></cc:actionbar>
and the javascript function, which is also included within the user control, is
function myfunc() {
if (confirm("Before closing, please make sure you saved any changes.\nAre you sure you want to close?") == true) {
__doPostBack('theActionBar:theClose', '');
}
}
this works just fine on Framework 3.5 and previous versions.
any idea why is this happening??? or how can I solve this?? I have tried several suggestions I've found over the internet and nothing seems to work.
Thanks in advance.
.
I can't see an obvious reason, but have you considered simplifying your approach to avoid the custom javascript and hard-coded postback event reference? You can get exactly the same behaviour with an ASP.NET button's OnClientClick property:
<asp:Button runat="server" ID="btnClose" Text="Close" OnClick="btnClose_Click" OnClientClick="return confirm('Before closing, please make sure you saved any changes.\nAre you sure you want to close?')" />
Returning false from the OnClientClick code or function prevents the postback.
Switching to this approach may be preferable and may even solve your issue if it's something to do with the postback event reference.
Related
I'm trying to use the onclickserver on ASP.net to do something when the user clicks on a button but when I click the button nothing happens.
I really can't see what I'm doing wrong.
Here is the button:
<button id="BttnLead" class="bttnBlck" runat="server" onserverclick="BtnLead_OnClick">Lead</button>
And here the event I'm trying to use:
protected void BtnLead_OnClick(object sender, EventArgs e){}
Thank you.
I would bet it has to do with failed validation somewhere on the page, as #kman pointed out in a comment above. Are you using any <asp:FieldValidator/> controls anywhere on the page? If so, and they're not being handled correctly, all you would need to do to cause this button's postback to be triggered is to add the CausesValidation="false" property to the <button> control. This would have the button avoid the validation code that is (if it's the issue, which I really think it is) inevitably failing and thus never reaching the handler method.
P.S. It should be noted that you do NOT have to use an ASP.NET control (i.e. <asp:Button>) and the pure HTML <button> control with the runat="server" property renders a server side control just the same. However, if you're in the ASP.NET world anyway and you have access to these controls, they do provide some benefit that is nice; but that's a different conversation.
I have following checkboxes on my page:
<asp:CheckBox ID="rbBuilding" runat="server" AutoPostBack="True" OnCheckedChanged="HandlerPackageOnCheckedChanged" Checked="True" CausesValidation="False" />
<asp:CheckBox ID="rbContent" runat="server" AutoPostBack="True" OnCheckedChanged="HandlerPackageOnCheckedChanged" CausesValidation="False" />
There is an logic on postback based on combination of checkboxes clicked. Everything is working fine except one case:
I'm opening additional telerik radwindow which has some validation within its own validation group. If I close the window with any validation error, then the first click on any of that checkboxes
does not do postpack.
Only FIRST click is not working. next time I click everything is working fine. I've tried to add check boxes to theirs own validation group and change casing validation to true. But behaviour is exactly the same. When I add test javascript method to onclick for that checkboxes then this method is fired without issue. There is just no postback.
I also tried to reset all validators for window validation group on window close, they are reset, but behaviour is not checking, and first click is not working.
UPDATE:
I've made one more check and realized it only happens if I do in javascript:
window.Page_ClientValidate("MyGroup")
Which I have to do before do some calculations on popup window.
During dynamic validators, when updating validatable controls eveything is working properly, even if validation fails. So the problem is *Page_ClientValidate*
I know this is an old question but I ran into almost the exact issue and thanks to the following link I was able to resolve the issue:
Issue with postbacks and clicking on controls twice
I ended up adding this code to my code behind to add a javascript event handler for the checkbox's click event:
Checkbox1.Attributes.Add("onclick", "checkboxChanged();");
I then added the following javascript:
function checkboxChanged(arg1) {
Page_BlockSubmit = false;
}
The checkbox in my situation was also set to have CausesValidation set to false but I don't think that's required for this fix. Hopefully this helps someone.
In the website I'm working on, there is a bug I'm unable to figure out.
The bug is the following.
I have two different pages (with different functionality/controls). Both of them include the same page header that include a logout button.
<form id="Form1" method="post" runat="server">
<uc1:pageheader id="PageHeader1" title="XXXXX" runat="server"></uc1:pageheader>
<!-- page content goes here -->
</form>
The button is the following (located in pageHeader.ascx)
<INPUT type="button" value="Log out" id="btnLogout" name="btnLogout" runat="server" onserverclick="btnLogout_ServerClick">
With a server side function btnLogout_ServerClick that handle the disconnection.
In one of the page, the button is doing its role just fine.
In the other the btnLogout_ServerClick function is never reached.
I tried to put a breakpoint in the page_Load function of both pages. They both start with a first passage with the IsPostBack value set to True but after going through the loading of every control on the page, the first one end up in the log out function, whereas the other starts a new page_Load cycle with IsPostBack set to False.
There is no trace of error/exception on what could cause this behavior, if anyone could give a hand, either in giving a solution or providing a way to find the problem, that would be welcome.
And I know that I could try to remove every control and add one at a time to see if they prevent the button from working, but both pages have numerous control and it'd be nice if I could avoid that.
Use browser tools (IE dev tools, Firebug etc) to see if the posted data is the same in both cases. If there are any redirects check if other code is not doing redirect before the event is raised.
First thing I would check is the event handler for the button. Are you sure it is correctly registered ?
Possibly related to user control event handler lost on postback
In my asp.net web page, there are a few of buttons and checkboxs. They all can cause postback.
Can I detect which control is clicked? Because I will add code for if clicked a button then do something.
I saw that some examples are done with Jquery.
Can we just do it in C#?
Thanks.
Why are you not just using the click behavior of the button:
ASPX
<asp:Button id="Button1"
Text="Click here for greeting..."
OnClick="GreetingBtn_Click"
runat="server"/>
CS
void GreetingBtn_Click(Object sender,EventArgs e)
{
}
reference here
You could check Request.Form["_EVENTTARGET"] for the control that generated the postback
well if each of the buttons submit a key value to the post or get parameters, and theyre all different it should be pretty easy! :)
localhost/home.html?button=clicked&link=selected
the above is an example of a get parameter url, you can use jquery to get those, or if its a post you would have access to them in a similar way...the previous page would have to have been a form though.
You could eventually do it by checking Request.Form["_EVENTTARGET"] but that is highly unusual and certainly not necessary.
Whatever you need to do, you can do it in the Click event handler of the given control.
You can set a server hidden control specifying the action (checkbox/textbox/button clicked) using javascript & retrieve that server control in page load to check its action & add your code for that action
Im using asp.net c# (webforms)
I want to add a back button to my page. (you land on this page if you incorrectly fill in a form).
if javascript is enabled i want to go back via javascript, but if it is disabled i'll just do a response.redirect("~/home.aspx")...
how can i implement this? is it 2 buttons? how can i hide the other in the 2 different states if so.
thanks
<asp:Button OnClick="serverMethod" OnClientClick="return(jsMethod);" runat="server" ID="redirectButton" Text="Back" />
on the button, but set the OnClientCLick to:
return(javascriptredirect());
and the OnClick to your button click event handler in your code behind.
if javascript is enabled, it will do the javascript redirect, if not enabled the page will post back and you can do your OnClick code behind method whic can to the response.redirect. You can also return false from your function to prevent the postback from occurring such as the case with setting the OnClientClick="return(confirm('Are you sure?'));"
This link guides you how to do it http://aspadvice.com/blogs/azamsharp/archive/2007/09/30/Check-If-the-JavaScript-is-Enabled-on-the-Client_2700_s-Browser.aspx
Happy coding !!!!!!