I'm scratching my head on how to accomplish the following task: I need to write a simple web forms filler/submitter with QT C++, it does the following:
1) Loads page url
2) Fills in form fields
3) Submits the form
Sounds easy, but I'm a web developer and can't find the way how to make QT accomplish the task, I only managed to load url with QWebView object using WebKit, have no idea what to do next, how to fill in fields and submit forms. Any hints, tutorials, videos? I appreciate this.
QWebElement class does all the work, just reading through the class documentation gave me a full idea on how to accomplish my task. Thanks to eveyrone for suggestions.
The best solution would be to write the logic in JavaScript that does what you want and then inject it into the page using QWebFrame::evaluateJavaScript() after it finishes loading.
There's also another way to do this; involving the document tree traversal API that's been available in QtWebKit since 4.6: QWebElement. You'd basically process the form pretty much the same as you would do in JavaScript, except that here the API is different and more limited. It's C++ though and might be a little bit faster. I guess, this approach might be less attractive for you, given you're a web developer and probably already know JavaScript.
Related
Assuming I'm stuck with asp.net web forms (I'd love to use MVC partial views), are there any good alternatives to asp.net AJAX 4.0 client-side templates?
In other words, is there some way to specify some html, with placeholders for data properties, to which I could then bind a JSON result. Are there any good jQuery plugins to do this?
I ask because based on the results I'm seeing from Google, this library doesn't seem to be widely used—most search results are from 2008-2010. This question seems to confirm that suspicion.
EDIT
I despise answering my own question, but this link (jQuery Templates) seems to me to be the best bet. If anyone else has any input, please post.
Definitely consider jQuery Templates. We use them quite extensively in WebForms with ScriptServices as a data provider. There is a very small learning curve.
Also check out KnockoutJS, which integrates seamlessly.
Adam, coincidentally, I am using JQuery to retrieve some server side data calling Web Services via Ajax and binding the result on the client side. On my particular case, I am only showing data in a tabular manner, so I am using the jquery datatables plugin (which is fantastic, in my opinion; the API is well documented and easy to extend if you need to).
If you need to show data differently, I think you'll need to write quite a good amount of boilerplate javascript code.
EDIT: I just saw your link reagarding Jquery Templates and looks really cool. I didn't know it existed :) Thanks!
i'm not sure how to call that. i'm looking for some samples guiding me how to implement a automatic page extend. i'm mean something like the friends list on facebook. first only a few friends are loaded. after you scroll down, some others get loaded.
thx in advance
The solution to your problem relies more on AJAX then anything else.
I suggest using jQuery Ajax, and here is a nice article that will get you started with calling ASP.NET web services via client side script.
enter link description here
If you don't have experience using ajax this will probably be a lot for you to grasp. Especially if you're going to dive in with a feature like you described above.
Edit: It may be more practical to use a plugin to achieve this:
scrolling jQuery plugin
I'm building a Bridge game.
The main page, where you play the game, boast some 200 controls, like buttons that represents the 52 cards, 26 others for won / lost tricks, plenty of text fields... You name it, total some 200.
Actually its been already built and runs under Winforms model, but with the unavoidable question of implementing .NET 4.0 onto user's machine that must run Windows, and installing the software.
Hence I'm considering creating an ASP version (no PHP please, since I'm fluent in VB, and ignorant in C, Java, PHP and the likes).
Is that a "real" option or am I dreaming?
Will it run smoothly for users with a 2MB DSL connection?
Oh, by the way, no MVC please, I'm too old for that sort of sh...t :->
Can it be done? Sure.
The problem for you might be that to do it effectivly you will need to use HTML, CSS, Javascript and the like.
What most likely would be a good idea for you here would be to go the route of Silverlight. It will give you a more rich UI experience and will allow you to code in VB entirely.
I don't see using ASP.BET directly as a good option here. To make it look smooth, you would have to use javascript heavily. I thing you would be better off with Flash.
If you prefer to use pure HTML/Javascript/CSS you can create rich Web UI's by modifying the Document's Object Model (DOM). With little knowledge of Javascript and the usage of some library like: scriptaculus, prototype, sarissa, jquery, you can get rich interfaces. You should take a look at some of these libraries mainly scriptaculus because the set of animations it provides. Another javascript library made for game development is gameQuery.
With that many controls on an ASP.NET page your view state will be gigantic. If you plan on only serving up a couple of games at once then it shouldn't be a problem but you have to actually start thinking about bandwidth with that large of a viewstate. You would be better off with a DOM/jQuery type interface which displayed static images for the cards. All interaction can be handled client side and validated with a server side call.
This might be the perfect opportunity to learn javascript :). Remember each language you learn is another tool in your toolbox. The engineer with the most tools usually wins :).
i know vb.net, but have had no experience at all with web programming. i need to make a web app that can run in a browser where there is a board game and pieces that you can move around. can someone help me get started? are there any examples in asp.net?
i need something like this:
http://www.hallofbrightcarvings.com/game/grid
i don't know what language this is built in, but i would much prefer vb.net. i would like the pieces to be pictures instead of text. please help get started.
I have a very basic example of moving pieces around a grid written in javascript.
You can see it in action here and if you take a look at the source you can see it's done with jquery mostly. Feel free to take a prod around, I haven't updated that version in a long time but hopefully you might find it useful.
I think ASP.NET can do very little for you according to what you described. What you need is either Flash or Javascript skills.
Let's decompose this, you need two things if you want to make the whole thing yourself
Client Side: Flash, SilverLight, JAVA
Server Side:PHP, ASP.net, Java
As you know vb.net and want to work with asp.net, so I recommand to use Silverlight.
How complex can this be?
Depends on what you want to build, if you want to build a Mafia war games, then you'll need to work the user interface and it'll be very hard. Also the server side will be important as you need to handle registration and relation between different players.
If you specify more your question, you could get better answers.
The example you cited above is fully client-side, which means the code all sits on the browser and the server doesn't do anything to enable the grid. So if you did a "Save As" of that page on your computer, you could run it offline.
You should use the view source functionality of your browser on the page you cited, and look at how it's built. It's done using HTML, CSS and javascript. Use w3schools to get yourself started on those three matters.
If you really need to code it using vb.net, I don't know of any way that allows drag-and-drop for web forms. I'd be interested to know though. Ajax and .net drag-and-drop should be keywords for you to look into.
To do this on the web, you'd probably want to divide the project into two components: Client-side and server-side.
On the server-side, you'll want to use language like PHP, Python or ASP.NET. I think ASP.NET has some way to use VB.NET, so that would be a good choice for you to minimize the number of new things you need to learn.
Client-side is going to be the big hurdle. There's basically two different approaches to take here:
HTML+CSS+Javascript, using HTTP callbacks (ie, AJAX) to communicate with the server.
Flash using Flex (I think HTTP calls is probably the easiest way to talk to your server here as well.)
For a game like that, I would think that Flash is probably the best way to go. It will be easier to do graphics and sounds, and it'll run the same in every browser that has Flash support.
Not sure if this belongs in community wiki...
Can somebody give some general guidelines on how to successfully build an ASP.NET site that isn't dependent on JavaScript? My understanding is that I should build a functional site initially without JavaScript, and use it to enhance the user experience. That is easier said than done... how can I make sure my site works without JavaScript short of disabling JavaScript and trying it? Or is this something that comes with experience?
Try ASP.NET MVC! sure most of the examples use JavaScript for the AJAX functionality, but it's easy to build a fully functioning site that doesn't use JavaScript.
Since ASP.NET MVC doesn't use server controls with all their embedded JavaScript, it's a great way to build a site with very minimal and lightweight HTML, while still writting your data access and business logic in C#, VB.NET, or any other .NET language.
I've built working ASP.Net sites with little or no JavaScript, so it's definitely possible (just a royal pain.) The trick, and this sounds silly, is to use as few <ASP:> type tags as possible. Those all spawn various levels of JavaScript. Regular old-school HTML elements work just fine with no scripting.
So, on the extreme end, you write, say, your form using all plain-vanilla HTML elements, and then you have that form submit point at another page that accepts the form submit and hands it off to your server-side scripting.
To put it another way, pretend that all you get with ASP.NET is a snazzy server-side programming language and you're writing HTML in 1998.
Now, having done this, I can tell you that what this ends up as is a classic ASP webpage with cleaner programming syntax. ;) Most of the features that make ASP.NET "better" than classic ASP hang on JavaScript, so writing a JavaScript-free ASP.NET system is an exercise in shooting oneself in the foot repeatedly.
However, the one thing you should absolutely do is make sure the first page or two do work without JavaScript. Unlike 10 years ago you can safely assume that any browser hitting your page has JavaScript, and unlike about 8 years ago, your visitors probably don't have JavaScript turned off for speed reasons, but they very well might have something like the NoScript plugin for Firefox dialed all the way to 11. So, your first couple of pages need to work well enough to a) tell the new visitor that they need JavaScript, and b) still look and work good enough to make it look like adding your site to the white list is worth it. (In my experience, most people get the first one done, but in such as way as to totally drop the ball on the second. To put it another way - if your super fancy web 2.0 mega site starts looking like craigslist if noScript is fired up, I'm probably not going to bother letting you run scripts on my machine.)
If you want to use many of the ASP.NET controls (i.e. the DataGridView), ASP.NET pages are generated with lots of JavaScript in order to handle the events on the controls (i.e. selecting a row in the DataGridView). I think you're going to lose so much of ASP.NET that trying to have ASP.NET work without JavaScript enabled is impractical.
Disabling Javascript is the best way to test how a web site performs with out it. Good news, IE8's developer tools provide a quick and easy way to do just that. Now, having said that, often times the only thing that you can do is put up a message with a noscript tag to the effect that your site requires javascript for best function.
Many ASP.NET functionalities & controls won't work when JavaScript has been disabled. Think of LinkButton's onclick event which contains a call to a JavaScript function.
LinkButton is just an example. But there are many other things too.
If your concern is with JavaScript being disabled in user's browser then you can check for that and handle your site accordingly.
If you do decide to build the site without JavaScript then you will end up building a somewhat static web site. If your need is just to build a static website then you can go on with this approach.
Write everything with basic html forms and css, and then you will know that it works without javascript.
Once you are happy with it, then look at unobtrusive javascript, so you can modify the way the application works when javascript is enabled.
Last time I looked at some stats about this around 1% disable JavaScript, so why spend hours and hours on this when what you should do is show a message telling the user that your site requires javascript.
Use your time to be productive instead of trying to write around perceived limitations.