I have a small requirement..
if the user dint sign off or log off then he try's to close the browser IE clicking on 'X' (top right of IE or Firefox browser ) then i need to ask a conformation message like "Are you sure you want to close ?" ...
I am using Master page in my application and i tried the event : "window.onbeforeunload " in my master page its works fine, shows an alert(conformation) message. but if i press back button on the browser(IE on IE or Firefox) then also its firing(but it should not) is there any way to full fill my requirement ..I hope i had explained u clearly...if not pl z let me know........
what i mean to say is.. if the Session("USerid") is active or if it contains any value ie.
Session("USerid")="XXX"
at that moment if user trys to close the browse(click in 'X'/Close button browser either IE or Firefox ) it should give prompt a message "are u sure do u want to close?"..
Its all about design steps - but the close and the back button is the same, the close the page, so maybe its impossible to have them all together.
To open, close your script you can make a simple trick. Place them inside a literal and open or close it.
<asp:literal run="server" id="txtCloseAlert">
<script>
... you code here ....
</script>
</asp:literal>
and on code behind.
txtCloseAlert.visible = !string.IsNullOrEmpty(Session("USerid"));
I've looked into this recently and there does not appear to be a standard / consistent way to do this cross-browser hence you back-button problem.
On IE at least you get an event object passed as a parameter to the onbeforeunload method that you can use to get the mouse position, but in FireFox you don't and you would need some other way to determine whether a confirmation is required. It is quite posible that you could get the mouse position in some other way as I haven't looked into that. Point is that if your mouse is not on your form you probably want a confirmation.
You can look at this SO question:
Prevent browser from closing in asp.net
Or do an Internet search on 'onbeforeunload prevent browser closing'.
In your case a synchronous ajax call can be made to the server to do the test.
HTH
Related
for reason I won't bore you with, I'm writing an asp.net application that must open some pages in new browser windows.
I managed to open them within a postback (don't ask why, I just needed to) with this code:
script = String.Format(#"window.open(""{0}"", ""{1}"");", url, target);
ScriptManager.RegisterStartupScript(page, typeof(Page), "Redirect", script, true);
Now I have new windows each one with a button that should close it. I have simply an onclick="window.close()" (but that prompts me when I'm closing the browser) or window.open('','_self','');window.close() (horrible, I agree but it's the only way I found to avoid the JS prompt)
On firefox it works perfectly but on IE7 (the browser our customers have) after 2-3 times I use that button to close the window I can't open other windows (in both cases, with or without the JS prompt). With the method above it does nothing, and with a click me a new window is opened but hangs on loading (it doesn't even calls the Page_Load).
What could be the cause? How can I solve this?
Thank you.
EDIT:
I forgot to mention that I'm using MS Ajax in most of the pages, and that may be the reason that forces me to use window.open('','_self',''); before window.close()
I don't know if this could cause also the hanging of IE
EDIT: Ignore that, it does still prompt the user - sorry!
For your first issue about closing the window, have you tried:
self.close();
Not too sure about the hanging issue though, I use window.open() and have never experienced issues in IE7.
I finally came to a solution:
on the attribute assignment there was a return false; missing.
Now it works perfectly with "window.open('','_self','');window.close();return false;".
I would like to open a document after my ASP.NET page loads in a separate window. I would like to do this with the document not attempt to be blocked by a pop-up blocked. I tried and I am getting the prompt to ask if I would like to allow the popup. Is the best way to do this using a timer control or is there a better way in the lifecylce?
I have tried several events, but they are all launching the document prior to page load.
Fundamentally what you're trying to do is exactly the thing that pop-up blockers are designed to prevent - load a pop-up window without an explicit user interaction. There may be various tricks you could use to get around certain particular pop-up blockers, but you'll never be able to solve this in the general case.
The best solution is to have a link on your page to open the document in question in a new window. Pop-up blockers do not prevent links targeted to a new window.
I use
function openpage(page) {
if (document.getElementById('hf_open').value == 1) {
openChild(page, 'nueva');
document.getElementById('hf_open').value = 0;
}
}
and in the body onload ="openpage('whateverpage.aspx');"
and in an ASP.NET event I set if I want the popup to be open or not a particular time by setting hf_open to 1 if the pop up has to be opened at that time.
In Internet Explorer 7 with pop up blocker: turn on checked - it works.
How are users getting to your page? You could place the popup JavaScript in the link that takes users to your page.
You could use the onload JavaScript event.
function open_page()
{
popupWin = window.open('windowURL','windowName', ' resizable,dependent,status,width=500,height=400,left=0,top=0')
}
Then have the following body tag
<body onload="open_page()">
However, this won't get around your popup blocking issue.
I have this linkbutton with post-back disabled ... I should have done it with an html control but just did it that way .. It is toggling a language bar on top (marara.com.tr - language link)
It needs to be clicked twice in order to get the div to fade-in. I can correct the problem but just want to know why it behaves like that. .. in the first click it adds a # sign to the address bar then on the second click it does what it is supposed to.. any leads?
thanx in advance
Emre
I had a similar problem. It depends on the browser you are using (This occurred when I was using Firefox but not when I was testing in IE6). It seemed like the browser looks at the URL and sees that nothing has changed (except the #...) so it doesn't reload the URL, causing the #... not to register. You can trick it into thinking the query string has changed by adding a '&' before the '#' so that you add &#... to the URL.
I'm showing a modal dialog via "window.showModalDialog(..." which happens in a vbscript function (the page shown is aspx). I'd like to do some resizing of the window based on the number of rows in a datatable that's coming back. So naturally I go to register a startup script that resizes the window based on the number of rows. Well, that didn't work, so I tried to register a script that just showed a msgbox.
The code looks like (in the OnLoad event handler):
if (!this.ClientScript.IsStartupScriptRegistered(typeof(MyPageClassName), "hello"))
{
this.ClientScript.RegisterStartupScript(typeof(MyPageClassName), "hello",
#"<script language=vbscript>
sub fnWindowOnLoad()
MsgBox ""hello""
end sub
<script>", false);
}
if (!this.ClientScript.IsStartupScriptRegistered(typeof(MyPageClassName), "hello"))
{
throw new Exception("Failed to load script");
}
To me it looks like this should work and show a message box that says "hello" when the page loads (I've got the window's onload event set to fnWindowOnLoad). But what happens is nothing, no exception, no alert. I've tried every Type I could think of in the typeof call. Nothing seems to work. The only thing I can think of is that since the dialog is a modal ClientScript.RegisterStartupScript won't run properly. But that doesn't make any sense to me.
I put the MsgBox "hello" call into my script block directly and the alert showed, so it's possible. But I need to modify some arguments in the code behind so I have to use RegisterStartupScript as far as I can tell.
Have you tried opening your window via window.open() rather than window.showModalDialog()? I've seen some postings on the web about incompatibilities between showModalDialog() and RegisterStartupScript.
showModalDialog() is an IE only method, so it's not recommended anyway. I know it's convenient because it returns a value, but there are various ways to simulate this functionality.
Edit: The other problem with showModalDialog() is that IE often caches the results. This means that if one time you calling the dialog, you do not resize it, then another time you do, then 2nd time might get your the first cached dialog. A way to get around this is to add a unique querystring at the end. Like MyDialog.aspx?q=320934 (randomly generated or generated based on server tics).
The solution for this was to have a script that read a value out of a hidden field and then resized the dialog. The value was set on the Page_Load. Using RegisterStartupScript never seemed to work, neither did RegisterClientScript, so I'm pretty sure modal dialog and RegisterXxx don't get along. Need to use window.dialogHeight & window.dialogWidth in the vbscript.
I am writing an intranet application and am considering the use of a pop up window. I am not worried about accessibility since it's an intranet app.
The scenario is such as I need to be able to have the same code be used in a server page as well as in the middle of a process; which is why I decided when using it in the middle of the process, it's best to have it as a pop up window to running out of the real estate on the screen.
Any thoughts on this? I am hesitant to use a pop up window in such a manner as I usually only use it for error messages.
I don't completely understand what you're trying to do, but I think a popup window might be somewhat of an issue if the user's browser automatically blocks popup windows. Plus, if you were trying to run a process in the popup window, the user could close it and no longer have a way to check on the process.
Would it be possible to use Ajax to call back to a web service that gives the page information about the process? You could give the user a way to make the Ajax call to check on the status of the process or just have it continually polling in the background.
Edit:
You said you weren't too familiar with Ajax. For the most part, there are libraries to handle all the of hard details. I'll recommend jQuery because that's what I've been using for a while now.
If you go the Ajax route you'll be able to contain everything on one page and make the updates you need to make when the Ajax call is successful. Depending on how you write the code, it should be pretty reusable if you do it right. It really depends on how specific the your needs on each page.
Take a look at the jQuery documentation though. It may have what you need already built into it. Otherwise, someone else might be able to suggest some reasons why their favorite JavaScript library works better for what you're trying to do.
I think you might want to do something like this:
Inside of the parent page:
<input id="btnShowModal" runat="server" type="button" value='Show Modal' onclick="ShowModal()" />
function ShowModal()
{
var retVal = window.showModalDialog("MyPopup.aspx?param1=value","","center=yes;dialogWidth=200px;dialogHeight=200px;status:0;help:0")
if(retVal != "" && retVal != undefined)
{
//This code will be executed when the modal popup is closed, retVal will contain the value assigned to window.returnValue
}
}
Inside of the modal popup:
<input id="btnSave" runat="server" type="button" value='Save' onclick="Save()" />
function Save()
{
window.returnValue = "Whatever you want returned to the parent here"
window.close()
}
The usual argument against popup windows is that they are unreliable. The user may have disabled script initiated popups, I know I have.
In a controlled environment, such as an inranet, you may be able to be guaranteed that this is not the case, but even so, why risk it, there is an alternative.
Instead of popping up a new window just insert a new, absolutely positioned <div> into the document and insert your content into that using ajax or even an <iframe>. There are lots of examples/libraries on the web.
Thickbox for jQuery for example. There are of course scripts that don't require libraries.
I generally use a div with a z-index and absolute positioning; the .show() can be written and called on demand, it would have a button to .close(), and AJAX can make it seem modal so it must be clicked to close if you so desire. Then again, I hate messageboxes.
I was trying to avoid AJAX, simply because I have never used and don't have the time frame to learn it now. However, I am not totally opposed to it.
In short what I need to do is for the pop up window interact back with the page. Imagine that on the page I am building the links of the chain. Each link has unique properties. When user clicks on "ADD LINK" button, I was thinking have a pop up window with the little form and a Save button. The only issue with this is that a pop up needs to interact with the page; we need to know when something has been saved or not saved.
A div on the same page is one way. A pop up is yet another way. Another catch is that this code (adding new link) needs to be reusable, because I am also going to have a page that just creates new links.