Is there a simple way to trigger a mobile OS's native pop-up/alert/etc. from some form of web code? I'm writing an ASP.NET mobile web page and I'd like to, for example, have the iPhone's UIAlertView appear.
EDIT: What I'm looking for is not the method with which to detect which mobile browser is accessing the site (I already know how to do that). If the code to trigger a pop-up that will look nice in an Android browser is different than the code to trigger a pop-up that will look nice in an iPhone browser, I can simply throw in a switch statement that redirects the user to the pop-up that corresponds with their browser. I'm trying to find the html/javascript/asp.net code which will create a mobile-friendly pop-up, either in general or for the various popular mobile web browsers specifically.
Don't know whether there is any pre-built functionality in .NET that can achieve this, but you can surely write one yourself.
You can write a method, that returns the code for your popup, based on the user OS (simple switch statement should do).
EDIT after taking a short nap:
I believe you should reconsider using popups. They are quite annoying even on desktop browsers and many people block them automatically. Probably every blog about accessibility will tell you, that you should keep mobile version of your website as simple as possible because of various compatibility issues that you can run into.
Instead, try to think about some interesting way to incorporate messages for users in a different and appealing way, that won't disturb anybody.
What I do is use a div popup (that floats ontop of the page) and eighter make a big close button or set at timeout to remove it.
jquery mobile is a good place to start.
Related
Not a good way to start, but pardon me if this if off-topic, it seems like a programming question though...
From an ASP.NET website I want to open a page in a new browser that has a toolbar at top and an iframe-like window at the bottom. The frame-like window will support tabbed browsing and load a third party website. The toolbar will have buttons that allow the user to manipulate the HTML (form-fill and web-scrape). For example, toolbar buttons may be "Extract Webpage Data" or "Fill Form".
Ideally it would work with IE, Edge, Chrome and Safari, but an absolute minimum requirement is IE, a more preferable minimum requirement is Chrome and Edge.
I have seen this done, well, by other proprietary software. I do not know if they require a specific browser (like IE where they can install a plugin) or how they do it, that is my question.
So I have narrowed this problem down to three possibilities:
Use pure HTML, Javascript, et al. - Using an iFrame almost works perfectly but the content will not be in the same domain so I cannot access the iFrame's HTML.
Use (or write) a proprietary browser - I do not think you can (or want) to launch an EXE from a web page, plus this seems rather complex in itself.
Use (or write) a plug-in - Probably limits use to IE. I think an IE plugin could do what I want based on other plugins I've seen.
I have past desktop programming experience with a web automation and scripting product, while promising, I don't think they offer what I need:
They have an ASP.NET COM component that runs server side so it does not display an interface to the user but can be used to silently fill and scrape a website based on scripts.
They also have a proprietary browser that shows a user interface and runs scripts to fill and scrape. But this is an EXE, so cannot be launched from a web site.
They have an IE Plugin, that adds a companion popup window that attaches itself to IE. Similar to their browser and runs scripts.
Question - This can be done, I've seen it, but what is the mechanism? I'm leaning to an IE plugin.
If plugins are the answer, chrome has extensions, is that a possibility?
How to Disable print, print screen, right click using asp.net
You cant. You cannot avoid content being copied from your pages.
Disabling Right Click is possible, but it doesnt solve your 'problem'. The user could still copy your image, by disabling javascript or just inspecting the source.
And even if you could disable those keys, the user could still just make a photo of his monitor. Good luck disabling that!
Short answer: You don't. You are writing a web application; features of the underlying platform are outside your scope, and you have no business trying to fiddle with them.
Long answer: You can try to capture those keys using javascript, and override the default behaviour, which will somewhat stop very naïve users, but all it takes to disable this "security" is to turn off javascript. Even if you come up with more sophisticated "protection", the essence remains: You are sending content to the client, and once it gets there, it is out of your hands. Given suitable tools (wget is enough for most things), anyone can copy and modify your content in any way they like. Similarly, whatever can be shown on the screen inside a browser can be captured and saved. There is no way around it. If you don't want your content copied, don't send it.
Forget about it. You will irritate your end users who will find a way to con you and do what you didn't want them to do. Forbidden fruit is always the sweetest. By telling them explicitly "you cannot do this", they will wonder why do you want to guard your content and they might try even harder to do stuff you otherwise wouldn't want them to do.
Psychology and technology are against you in this case.
Printing
You could disable printing (well sort of - it's not 100% effective) using a "print" style sheet.
I have not tried it myself, but here is a link that could get you started: http://webdesign.about.com/od/advancedcss/qt/block_print.htm
Print screen
Print screen is something that is typically controlled by the operating system not the browser nor webpage. So you are unlikely to be able to stop this. However, casting my mind back I remember a time (perhaps a long long time ago), where you couldn't take screen shots in Windows (maybe Windows 98) of videos... so if your really in need of disabling print screen - perhaps you could perhaps encode your content in a video... but this will have many many downfalls - namely accessibility, search engine optimisation and it being a royal pain to do... so I wouldn't recommend it under any circumstance.
Right screen
Right click you can disable, but not using a server-side technology (such as ASP.net) instead in a client-side technology such as javascript. A quick search in your favourite search engine will find some help. But disabling right click is rudimentary to get around, so it is not full proof.
An alternative to protect your content is to possibly investigate "rights" in PDFs. I believe you can disable the "right" to print.
However none of these solutions are going to be full-proof. As long as you are making your content available to an end-user on their own computer, there is always going to be a way around your restrictions.
I have implemented for disabling printing using window.onbeforeprint()
Refer this Answer
Can any one tell how to disable focus to a browser.
Hi i am currently working in .net application and i need to disable the tab focus to browser objects such as toolbars,address bar, since the user will not be using these components often
Thank you
Please don't do this, it breaks what the user expects a webpage to do. Messing with the fundamental behavior breaks several things:
My tab button and where I expect it to go
Screen readers for the disabled
Trust in your application
In some cases, you need to ask why? before asking how?, this is one of those. Anything that behaves differently from the other 99.9999% of the web is broken in the eyes of your user.
Well, I agree with Nick Craver. If you have to disable due to some crap requirements, then try opening a new window without toolbar, editable address bar etc and load the page inside the newly opened window.
customers does not want to allow user to use back or forward button. Just a clean page without commandbar and toolbar, same for FF an IE.
Disabling them is not an option as now.
You cannot change that kind of thing in a existing window -- the only way you can make those disappear is by opening a popup, specifying they should not appear in that popup when it's being opened.
Still, note that you should not try to disable those buttons nor have them disappear : your application should work fine with them, handle their actions -- after all, it's one of the few things users have understood in browsers...
And as a user, this is disturbing and annoying :
I don't like popup windows -- and I'm not the only one who doesn't
I don't like when a website tryies to take control over my browser
It will not always work anyway.
And, as a sidenote : even if the back/forward buttons are not displayed, users can still use Ctrl+left/right or some kind of equivalent !
I know this is not easy, but a part of your work as a web-developper is to explain your clients how Internet and web-applications work... not the same way as desktop applications !
If you can force your users into IE (can't believe I'm suggesting use of IE!) you can do this trick. Try running this from the command line
"C:\Program Files\Internet Explorer\iexplore.exe" -k
This will force IE into kiosk (or full screen mode), similar to pressing F11 when in a usual browser session.
PS. I agree with the other answers suggesting this should be discouraged but there are instances (such as when the end user really can't be trusted) that this is a good solution.
No, there's no other way.
However, this is extremely annoying behavior and should be greatly discouraged. This isn't a code issue to solve...this is behavior that shouldn't be implemented at all.
My opinion here, you have a client problem not a code problem. Whatever standard is the expectation, and the user has the expectation of having their back/forward buttons, break that and you break their experience.
Ever see a Windows application that removes the taskbar? That's the equivalent...
I don't think there is a reasonable way to disable the behavior. You may get rid of the buttons in various ways, but the behavior is still there (through keyboard commands, popup menus and so on).
The only reasonable way is to make your web application follow web semantics, and make the client realize this.
many web based ERP (for example) does not tolerate people using navigation buttons. BUT these web applications handle the fact people use these buttons and do not crash. That's what you should do. If each time people use the back button, they get an error message, they will quickly stop using it.
The solution that used to work in IE was adding a startup script with one line:
location.forward();
I am developing an ASP.NET application for an online quiz test. The set of questions would be randomly selected from a pool of questions. The application works fine, but I want to hide the browser menu option (so that user cannot save or print the test) when the quiz page is shown. I do not want to open a new popup window. So how do I do this for the active window.
The application consists of around 5 web pages, and the test is on pages 3 and 4. So I want the menu to be hidden only on pages 3 and 4. Is this possible and how do I do this?
Thanks in advance
This isn't possible. You can only hide the menu bar in a popup window.
Either way, though, the user can always right-click and select Print, or use a shortcut like Ctrl + P. And even if you could hide the menu, they could just disable JavaScript. If they really want to print/save the quiz, you won't stop them. I suggest finding another workaround.
I don't think it is possible to do what you are asking.
And remember that there are other ways to print than using the menu of the browser : Ctrl+P generally does that , it's also possible to "save the page" from the right-click menu or using Ctrl+S -- and, of course, there is always print-screen ;-)
The best "protection" you can probably have is defining a correct license (which means you might need a lawyer, to get something solid), that explicitly forbids re-distribution of questions : this way, your users can re-use the questions for them -- you cannot prevent that, anyway -- but can't re-distribute them.
Of course, this is probably only worth it if you are developping some quizz with questions that you are going to sell.
Once the page is rendered to the screen the ultimate control goes to the user. He can turn off javascript and do the necessary job or he can capture the page and so many ways.
Better not to try doing this.
As long as the data is in the user's computer he may access it in one way or another, and i'm not sure its worth the hassle.
If you want to deny printing, you may try using some special CSS media types (like definning some styles with display:none or color:#fff).
http://www.w3schools.com/CSS/css_mediatypes.asp
But even like this the user might simply press PrntScr :)
You may also intercept ctrl+P keystrokes, by using an onKeyDown event on the whole HTML body and stop the bubling, but it may not work the same cross-browser.
You may also deny right-clicking on the page by handling the onContextMenu event ( http://msdn.microsoft.com/en-us/library/ms536914%28VS.85%29.aspx )
Also, the questions should be rendered as images, or deny selecting text from the page so the user wont be able to copy/paste the questions in an email (http://www.dhtmlcentral.com/forums//archive/index.php/t-18008.html mmight help)