So I've just published a website for the first time and I've come up with a problem. It looks like that the _Layout.cshtml page and the views conflicts with each other, because it doesn't load all of the CSS and JS. I get a few errors in the console tab which says:
"
HTML1503: Unexpected start tag,
HTML1512: Unmatched end tag,
HTML1506: Unexpected token.
"
When I go to the source of the page where the error occurs, the layout and the view page are combined together, it gives the error at the seconds head tags. The first first head tag is the one from the Layout page and the second head tags is from the view page. Thus having 2 head tags in 1 page and it conflicts.
Is there something I missed before publishing? Because on localhost it runs fine without these conflicts.
Hope someone can help me, thanks in advance! :)
I recommend you read through this MSDN article on Layout pages using Razor.
It sounds like you're repeating your header information.
From the article,
Many websites have content that's displayed on every page, like a
header and footer, or a box that tells users that they're logged in.
ASP.NET lets you create a separate file with a content block that can
contain text, markup, and code, just like a regular web page. You can
then insert the content block in other pages on the site where you
want the information to appear. That way you don't have to copy and
paste the same content into every page.
In other words, the layout page has all of the markup that you want repeated on every page. This way, you don't have to repeat it manually.
A content page can have multiple sections, which is useful if you want
to use layouts that have multiple areas with replaceable content. In
the content page, you give each section a unique name. (The default
section is left unnamed.) In the layout page, you add a RenderBody
method to specify where the unnamed (default) section should appear.
You then add separate RenderSection methods in order to render named
sections individually.
Since each page is likely to have multiple sections, you can use the RenderSection method to differentiate them in your layout.
Here's an example from the article:
<!DOCTYPE html>
<html>
<head>
<title>Multisection Content</title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="header">
<div>This content will repeat on every view that uses this layout.</div>
#RenderSection("header", required: false)
</div>
<div id="main">
#RenderBody()
</div>
</body>
</html>
As you can see, any header information will be loaded using the RenderSection method. On your view, you would define that section using code similar to this:
#section header {
<div>
This content will only repeat on the page that it is declared in.
</div>
}
So, when you run it, you'll get:
<!DOCTYPE html>
<html>
<head>
<title>Multisection Content</title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="header">
<div>This content will repeat on every view that uses this layout.</div>
<div>
This content will only repeat on the page that it is declared in.
</div>
</div>
<div id="main">
...
</div>
</body>
</html>
The required:false part of #RenderSection("header", required: false) means that you do not have to include the Section "header" in every view that uses the layout. It is optional. If you do not have required set to false, it will be required that you declare it on every page that uses the layout.
On a side note, make sure you only declare your css and javascript that in only one of these locations, preferably the layout page if it is going to be repeated. This does not mean, however, that you cannot have css and javascript in both. For example, if you are using bootstrap in your project, you would include that in your layout page so that you do not repeat the inclusion throughout your views. But, you may, for example, include a view specific javascript file in only your view and not the layout.
Related
My main web page (index.html) follows a common structure (simplified):
<html>
<head>
<title>...</title>
<meta name=description content="...">
<link rel=stylesheet href="main.css"/>
[... including #font-face loads ]
</head>
<body>
<div id=menu>...</div>
<div id=mainContent>
...
</div>
<div id=footer>...</div>
<script src="jquery.min.js"></script>
... more scripts
<body>
</html>
The web server is well configured such that all the static files are cached and don't get reloaded on the client side if refreshing the page.
Upon choosing a link from the site, mainly from the 'menu' or the 'footer', I want to display different content within the div tag 'mainContent'. Page layout, CSS, fonts, scripts, menue, footer - all is the same. I have identified several means to achive this:
Construct a new subPage.html file copying everything from index.html, then rewrite the div 'mainContent'
with the desired other stuff and change page specifics like title, description etc.
Or use php to include the desired content in mainContent and to change the page specific values like 'title'.
Link from index.html goes to href="subpage.html".
Drawbacks:
Maintenance: when changing anything in the outside 'wrapper', I'll have to edit
every subPage.
no idea how to easily transport values from index.html
to subPage.html, beside cookie (not always permitted) or URL
parameters.
use a javascript onClick handler (event listener) to load requested content from server using XHttpsRequests and exchange the innerHtml of div mainContent.
Drawbacks:
no noscript version possible.
my changing content is probably not indexed by Google bot and alike, since it is not loaded with index.html. Would it change the situation if the 'alternativ content' was saved in .html files in the base directory, such that it would be browsable and discoverable?
Pre:
keeps javascript variables
no need to reload outer page, thus best user experience.
use a 2nd div 'mainContent2' with style="display: none". With a javascript onClick handler toggle display style of both mainContent divs to none <-> block.
Pre:
easy to implement.
all content loaded and thus SEO indexed.
Drawback:
Everything has to be loaded at once, so the index.html might get pretty big.
[4. iframe probably not an option (as the src attribut is static)]
I tend to opt to alternative #2.
Any other technics recommended? What is the 'best practice'? How is this generally done by the pros? Suggestions? Please elaborate.
I'll give you a few answers based on each option:
PHP
You can use PHP to import the header and footer instead of the main
content, that way you have just one file with a header and another
with a footer and all the pages that you create with different
contents will import the header and footer, avoiding duplications.
JS
Do you need a no-script version? I have never seen someone who disabled js but I don't know your app, it could be a pre-requirement.
You can use a modern js framework like Next + React / Nuxt + Vue / Remix / Svelte / ... There is a lot of options here that can provide you an SSR (Server Side Render) and make Google Bot happy
SPA
This seems to be a SPA. You can use some of the modern js frameworks that I mentioned in the second item. You need to think about lazing load the images too. I don't know how big is this content, but you can try google lighthouse to see if there is some problem with page size in this approach, also, you could enable the gzip on the server.
OR...
All of the above
You can use all of them together too. A frontend with a framework getting data from an API written with PHP, why not? PHP can validate the request type and delivery an HTML if it's the first request or a JSON if the application is already loaded.
Most common solution probably a variant of your option 1. But different then you think. Create a header.php with the content
<html>
<head>
<title>...</title>
<meta name=description content="...">
<link rel=stylesheet href="main.css"/>
[... including #font-face loads ]
</head>
<body>
<div id=menu>...</div>
and create a footer.php with the content:
<div id=footer>...</div>
<script src="jquery.min.js"></script>
... more scripts
<body>
</html>
Then create an index.php like
<?php include('header.php'); ?>
<div id=mainContent>
...content index page...
</div>
<?php include('footer.php'); ?>
And then create subpages like subpage.php
<?php include('header.php'); ?>
<div id=mainContent>
...content subpage...
</div>
<?php include('footer.php'); ?>
This way if anything in the header or footer needs to change you edit the header.php file and the changes will take effect on all pages because the header.php gets included on every page.
I have been migrating codes from .NET(webform) to .NET Core :
Within _Layout.cshtml, the following tags <hr>, <section> covers the full width(e.g. 100%) of the html as expected.
However, inserting similar tags within the content pages such as Index.cshtml do not cover the full width of webpage, for some reasons.
Even after adding in Index.cshtml
#page
#model IndexModel
#{
ViewData["Title"] = "Home page";
}
//test
<div class="container-fluid">
<hr style="width:20000%" />
</div>
one ends up with the horizontal line leading the expecting result from the right end side only, as opposed to the left-hand side, thus leaving me puzzled.
I was expecting to face issues following the code(s) migration on items other than the beforementioned tags. Thus any suggestion would very be appreciated.
For this phenomenon, I think you should take a look at the official documentation on _layout.
Doc:What is a Layout.
Article:What are Layout, _ViewStart, RenderBody, and RenderSection in MVC?.
RenderBody() is called to render the content of a child view. Any content on said view that is not in a #section declaration will be rendered by RenderBody(). Using the Layout view above, that means that all content in a child view will be rendered inside the . This allows us to separate layout that is common to all views from layout that is specific to a single view.
If we need some part of the page to change based on which child view the user is on,you can use RenderSection().
In your _layout:
#RenderSection("Body", required: false)
In your view:
#section Body
{
<div class="container-fluid">
<hr style="width:20000%" />
</div>
}
new to web dev here. I am wondering what is the common practice to have multiple pages with the same components (header, sidebar, footer) but only different in the content. I looked around there are suggestion about using php include and other about html import.
Say I have a basic.html with
<head> fixed stuff </head>
<body>
<div> sidebar here </div>
<!-- Here will be different content other each page -->
<footer> fixed stuff </footer>
<!-- common scripts here -->
</body>
Then I will have another 2 pages, say price.html, blog.html.
How can price.html recycle basic.html but just with different main contents in the body. I don't know how I can use include here. because the content is in the middle.
I would do basic.php and create header.php, footer.php. Then you can do includes on your page templates that would include the header and footer file. Then you can construct your price template...price.php
<html>
<head></head>
<?php include(header.php); ?>
// Price template content
<?php include(footer.php); ?>
</html>
Is that what you are trying to accomplish? This will allow you to add your header and footer content that is universal for your site and make different middle content depending on your page.
I am looking for a simple way to get a default header on all the pages I make.
Each page has different content but uses the same header and footer throughout, also the pages rely on the scripts set in the header and footer of the page to format the content.
I have tried using frameset but the content doesn't get the scripts or style defined in the header.
Basically I want to just specify the content in the html and automatically get the html of the header and footer. (i hope this makes sense)
(this is the header of the page, sorry its messy, this is for work and i was given a site and asked to fix it)
header.html pastebin
You can try something like this. You can save the data in a html file and load the data into other using the jquery.
You can use the jquery methods to load the data into header and footer, you may use a single html or even two files.
<html>
<head>
<script src="jquery.js"></script>
<script>
$(function(){
$(".header").load("other.html");
});
</script>
</head>
<body>
<div class="header"></div>
</body>
</html>
Other.html
This is header data.
http://www.hongkiat.com/blog/html-import/ Check this link, you may get an answer.
Let's say all of my html pages will have a top bar and banner with the same content.
Rather than copy the code for these content on all html pages, is it possible to have pages inherit the content from a base html page?
For example : base.html can have the top bar, banner, etc (all repeated content)
Remaining pages (index.html, about.html, etc) can inherit the content from base.html and then add more content.
Is this possible in html or do I have to copy and paste repeating content all the time?
In this situations (as far as I know)
You can use template based editors like Dreamweaver
You can use framesets (don't use them)
You can use iframe (meh.)
You can convert your files to PHP and just use a single include command (Y)
Copy and paste whole thing and when you get 100 pages, try to add a new menu...
I'd like to see other solutions too.
Example:
Lets say I've created a template.html it's something like
<html>
<head>
<title>asd</title>
style tags keywords bla bla bla
</head>
<body>
<div class="menu">
yeah I've my menu here well designed
</div>
<div class="content">
unique content here
</div>
</body>
</html>
Allright this is my one html file. Lets take top section of the page. Menu will be same but content will be changed so this is top of the page:
<html>
<head>
<title>asd</title>
style tags keywords bla bla bla
</head>
<body>
<div class="menu">
yeah I've my menu here well designed
</div>
Save this part as top.php Now let's see what have we left:
<div class="content">
unique content here
</div>
</body>
</html>
This will be our post page. But how can we get codes from top.php? Just like that:
<?php include("top.php"); ?>
<div class="content">
unique content here
</div>
</body>
</html>
Now, save this as page1.php BINGO! You did not wrote anthing about menu but include method will bring it for you.
Include basically writes everything from a file to another. You can check differences for include_once, require, require_once too.
Allright, we've created our first page. What about second one? Exactly the same:
<?php include("top.php"); ?>
<div class="content">
my second page here
</div>
</body>
</html>
Save this as page2.php
Well, you need to change your menu now but there are two pages, two hundred pages, two million pages... Who cares. Just change top.php that's all.
Please note that in this codes; top.php, page1.php and page2.php are in SAME directory. If you want to include from another path, you must use for example:
<?php include("../top.php"); ?>
//OR
<?php include("myFiles/theme/top.php); ?>
depending on your path.
I hope this helps. Read PHP guides for include. It's really easy.
You need a testing server (or you can use a local server like WAMP, XAMP etc.) to execute PHP files.
You can create template page and include it to the all new pages as javascript
<script type="text/javascript" src="includes/template.js"> </script>
Same way with php - using include