In ASP.NET Web Pages/Razor is there a way to include a file, such as a Helper or something similar, without knowing it's name?
In Web Forms I do this by dynamically adding a User Control, like the code below, but am wondering if there is a way of doing something similar in Web Pages?
ContentTemplateBase control = (ContentTemplateBase)Page.LoadControl("~/ContentTemplates/" + detail.Template + ".ascx");
control.DataSource = detail;
plhTemplate.Controls.Add(control);
I know I could do this with a bunch of conditional statements, like...
if (detail.Template== "Template1")
{
#MyHelpers.Template1(detail)
} else if (detail.Template== "Template2")
{
#MyHelpers.Template2(detail)
} ... etc
...but wanting to do this without having to list all possible options.
On re-reading the Web Pages documentation I see I can use the RenderPage() method to include code from another file, so this seems to be the best option.
Related
i need to update the design of a browser in delphi7 I was using the twebbrowser but he had many problems with javascript and navigation.. so i decide to migrate to Chromium. the problem is that I cannot find code on these components. does anyone know which command would be equivalent to this one in tchromium:
OleObject.Document.all.Item ('ElementbyId', 0) .value: = 'edit1.text';
i need to transfer a text from memo to textarea in html form and at the end send a click on the button on the html form. if anyone knows the commands and can share I appreciate it.
A more flexible alternative than DOM access could be to perform this in Javascript, with the ExecuteJavaScript method of TChromium.
From your summary description, the JS could be something like
document.getElementById('yourtextarea').value = <JSON stringified content of your memo>;
document.getElementById('yourform').submit();
Alternatively, you could implement a JS function in your HTML, and call it with ExecuteJavascript, this way there would not be anything specific (besides the function name) on the Delphi side, and the HTML would be free to evolve.
function setTextAreaAndSubmit(value) {
document.getElementById('yourtextarea').value = value;
document.getElementById('yourform').submit();
}
I wish to do the following things:
Insert external html blocks into new html pages
Use the same html header from one html file for a number of pages, without recreating the header again for all the pages
Please help!
You can use HTML Imports which is part of Web Components:
<head>
<link rel="import" href="/path/to/your/file.html">
</head>
If your page does not have to be pure HTML, you should consider using PHP or a similar server-side language.
There are plenty of options, depends on you:
1) use iframes (a lot problems with responsibility) http://www.w3schools.com/tags/tag_iframe.asp
2) ajax call in javascript, load external resource and then print it in placeholder tag (example is with jquery) http://www.w3schools.com/jquery/jquery_ajax_load.asp
3) use some server language/preprocessor (php, ruby, nodejs), depend if you can (need to by installed on server)
4) also there are static page generator, you add marks in your html, and they will compile html with marks to full static html http://hyde.github.io/ for example.
What you are talking about appears to be a process called templating. There are many ways to do this, including writing Javascript to insert pre-written HTML templates into the DOM (the webpage). You might also consider using a pre-written templating library such as http://handlebarsjs.com/ or another library which contains templating functions like http://underscorejs.org/. A simple MVC guide like:
http://blog.ircmaxell.com/2014/11/a-beginners-guide-to-mvc-for-web.html
May be helpful too, to get you started.
In a more practical sense, here's one possible solution:
To begin I would recommend putting the 'blocks' you want to insert in a separate folder. In the website I run, for example, I place them in the \templates folder (or subfolders) but you can more or less call it what you want as long as it makes sense to you. For our purposes let's say we've created block.html and put it in our \templates subfolder...
Now, within each template you will have whatever you want to load in; something like this:
<h2>Title of section</h2>
<p>My text.</p>
Or whatever you'd like. Then, you'll probably want to add an element to your main page which calls some Javascript, which loads your HTML template in when a particular condition occurs. For example, if you wanted to load in our block.html file you might write something like this:
<div id="calling-block" onclick="menuClicked('locationToInsert', 'block')"></div>
Which would call a Javascript function called 'menuClicked()' when we click the div with the id 'calling-block'.
Within the function we would write something like this:
<script>
function menuClicked(insertEl, UrlString, onTemplateLoaded) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
document.getElementById(insertEl).innerHTML = xhttp.responseText;
if (onTemplateLoaded) onTemplateLoaded();
};
};
console.log(UrlString);
xhttp.open("GET", UrlString, true);
xhttp.send();
};
</script>
This is a very simple way of doing things and I'm sure people will tell you there are problems with it, so I would definitely recommend doing your own reading as well, but I hope this covers the very basics.
You need tu use a server side functionality like php, aspx ...
after one hour of browsing I decided to ask this question here.
Is it possible to add css code to an url, for example to change the background color?
Someting kike this: http://yahoo.com (command)style=background-color:#000000;
or similar. Or is it possible to create an url where the site loads with a modified css without using a Chrome extension or similar?
Thanks for help!
No. You can't (using standard software) modify a document by adding anything to that document's URL (unless the server recognises the addition to the URL (e.g. if it was a query string) and returns a different document based on it).
If it was possible then browsers would be exposing every site to XSS attacks.
A browser extension would be the only way to do this client side (but would render users of that extension vulnerable to XSS attacks).
You could also use a bookmarklet in a two stage approach (1. Visit page. 2. Click to activate bookmarket.).
it's possible in a way, but probably not how you imagined it (see Quentin's answer to understand why).
with javascript - note that this is not a 'native' feature so you will have to do a little walk-around. look at the following example:
function get_query_param(name) {
name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
results = regex.exec(location.search);
return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}
window.onload = function() {
var bgcolor = get_query_param('bgcolor');
if (bgcolor.length) {
document.getElementById("xyz").style["padding-top"] = "10px";
document.body.style.backgroundColor = bgcolor;
}
}
now try browsing your page with ?bgcolor=red at the end of the url.
of course that's a demonstration of the main idea, you will have to implement each css property you wish to modify using this approach.
hope that helps.
Yes it is possible. Follow this:
Yahoo
is it possible to create an url where the site loads with a modified css
Solution:
Add something like this : ?v=1.1
<link rel="stylesheet" href="style.css?v=1.1">
When you change the css change the version like this: ?v=1.2 after then your browser will load newly updated css. Note that you can replace to any number each time you change the css.
This will have no effect on the CSS. It will only serve to make the browser think it’s a completely different file.
If you don’t change the value for a while, the browser will continue to cache (or preserve) the file, and won’t attempt to download it unless other factors force it to, or you end up updating the query string value.
I am trying to build a universal header file that I can include in each .html file on my site. My header contains several dropdown tabs, and one of the tabs is always highlighted (depending on which page the user is on). So I want to do something like a server side include for the header, but I also want to give it a variable so that it knows which tab to highlight, something like this:
<div class="topmenu">
<ul>
<someScript>
if (variable=="home") {
print "<li class='current'>";
} else {
print "<li>";
}
</someScript>
...
My server is IIS 7 and doesn't support PHP, and I don't want to rename all my files to *.asp so that I can use ASP. How could I go about this?
By the extension I guess you would use Classic ASP. Then something like this should work:
<!--#include file="header.asp"-->
You can put this in each file you want to have a header.
Of couse, you should create that "header.asp" page first ;)
For highligthing the tab of the page you're in, there're several methods.
IMHO, I suggest a clientside script to do that. JS or jQuery of course.
You could check the file name of the URL you are in and give the proper class to the tab so it will be highligthed.
Example ( jQuery needed ):
var currentPage = window.location.pathname.substring(url.lastIndexOf('/')+1);
if(currentPage == 'default.asp') $('li.homepage a').addClass('current');
This simple code retrives the file name and, by it, add a class to the corresponding element in your navigation.
Of course this is a conceptual script, you'd better adapt it to your page.
I have a website in which I finished with the basic layout, design, fonts, styles, css etc.
For almost whole of the website, the layout i.e the sidebar, the footer, the background etc. will remain the same. There are custom embedded fonts used as well.
Since this basic layout will remain the same all across the website, I wanted to ask how can I prevent downloading of this content (like side-bar, fonts, or javascript etc.) again for the user, so that the other pages after the start do not take as much time as the start page.
I am sure there would be some mechanism since most of the websites have header/footer/sidebar in common across the pages. My website is in plain html/css, and there's no backend being used. Any ideas?
Your images, fonts, css and other contents will most likely be cached by the client's browser on the first hit, so it will be downloaded just once.
For the html page itself, since you use static html content, the only way I can think of is using AJAX request.
You probably want to use includes. So on each page you'd have a header include, a footer include, a sidebar include and even an include containing links to your css/js files.
Simplest way to do this would be to change your pages to be .php pages and use php includes to pull in the header file, footer file etc.
You can static-site generator like Jekyll.
You may design a basic layout first.
Avoid inline and embedded CSS maximum and add a class (can assign to multiple) or id (can assign to single) to common selectors.
Make a master stylesheet like master.css and attach this to every page.
Hope this helps.
You can do this in two way. You say you don't have a backend, however the server where your website is hosted can be the backend.
Without any backend interaction:
If you really prefer not to use the backend at all, you can make this a single page website, with some javascript to switch the content you have in there. The idea is you have your website structure, and your default data available the way you normally have it right. But you also have the html for your other pages in hidden divs. Then when you want to switch to say the about link you use javascript to get the content from the hidden div with that content and you place that content in the main div.
<!--First lets use jquery thought it can use some other framework-->
<script src="http://code.google.com/apis/ajaxlibs/documentation/index.html#jquery"></script>
<script>
$('a[href=#myAboutPage]').on('click',function(){//Whenever link that points to #myAboutPage is clicked
var getHTMLFROM = document.getElementById('myAboutPageHiddenContent').innerHTML;
//And place it on main div
document.getElementById('mainDivContent').innerHTML = getHTMLFROM
});
</script>
If you wanted to use some ajax interactions:
The process would be the same with the exception that the getHTMLFROM content, would actually be an html file that you request from the server.
Both of this javascript oriented methods will work, but would NOT recommend if you want your information to be SEO friendly. With that said reuse an external piece of css, to minimize redownloading the styling of your interface every single time.
There are definitely many ways to do this. I am a fan of dynamic inclusion. Here is a link to a great tutorial which explains how to set it up for your own page very simply. Dynamic Inclusion Tutorial NOTE: Don't be afaid of PHP, or having to change your file extension to PHP. It won't change your coding experience at all. It will just enhance your abilities.
I also have used the Javascript feature to hide certain elements. Depending on the size of your website, it may be just as easy to reload your CSS and navigation elements. However, if you really don't want your menu and logo to blink momentarily while it is reloading, you can just hide/reveal elements very simply with a bit of JS.
Here is an example function from my website:
function toggleVisible(e){
var i = e.id;
if(e.className == 'collapsed')
{
e.className = 'expanded';
e.innerHTML = 'Hide'
var hiddenArray = document.getElementsByClassName('hidden' + i);
hiddenArray[0].setAttribute('class', 'expanded' + i);
}
else if (e.className == 'expanded')
{
e.className = 'collapsed';
e.innerHTML = 'Show More';
var expandedArray = document.getElementsByClassName('expanded' + i);
expandedArray[0].setAttribute('class', 'hidden' + i);
}
}
The above code will run when the following link is clicked:
ANYWEBSITE.com || <a onClick="toggleVisible(this)" id="4" class="collapsed">Show More</a> || View PDF
Also, another user mentioned caching. Caching appears to be unreliable. Check out the following links for more info:
AJAX cache
HTML5 Application cache
2009 article about browser caching from stackoverflow.com question