I'm converting an MVC aspx content place holder -> master page to an MVC razor section -> layout.
In the past when my aspx view came to something like this:
<asp:Content ID="HelpContent" ContentPlaceHolderID="HelpLink" runat="server">
Help
</asp:Content>
And the master page didn't have a corresponding HelpContent place holder (perhaps because a user was not authenticated) everything rendered fine (with no HelpContent section).
Now when I have a razor section defined that does not have a corresponding #RenderSection in the layout, I get this error:
The following sections have been defined but have not been rendered
for the layout page "~/Views/Shared/New.cshtml": "HelpLink".
Do I need to redesign this?
Is there a way I can have the view's HelpLink section render optionally if the layout gives it the green light?
EDIT:
I think there's some confusion, so let me re-summarize:
The layout logic looks like this:
if (User.IsLoggedIn) {
#RenderSection( "HelpLinks", false);
}
But then the user isn't logged in, it doesn't render, and then .NET throws an exception because the layout doesn't know what to do with the section.
You can indicate that the section is optional by passing false as the second argument:
#RenderSection("HelpLink", false);
Edit: In the case of control flow logic for rendering, you can use .NET in the razor view (like this c# example):
#if(IsSectionDefined("HelpLink"))
{
#RenderSection("HelpLink", false);
}
Or, if you want to base rendering on whether the user is logged in, you could replace the if logic in the above sample with your security check.
Edit 2:
Make sure you have defined the section:
#section HelpLink {
//This needs to be defined in any view that uses the layout with the #RenderSection. It can be empty.
}
Alternatively, you can add the check to see if the section exists and only define the #section in the required view:
if (IsSectionDefined("HelpLink") && User.IsLoggedIn) {
#RenderSection( "HelpLinks", false);
}
If a section is declared in a razor view it has to be rendered in the layout.
I found this in Freeman's Pro ASP.NET MVC 5 book.
Seems like a bad design to me.
In my view, would like to render the contents of an HTML file as a partial view. It is giving me this error though when I add this to the .cshtml view:
#Html.Partial(Url.Content("~/Test/main.html"))
Errors:
Exception Details: System.InvalidOperationException: The partial view '/Scripts/main.html' was not found or no view engine supports the searched locations. The following locations were searched:
/Scripts/main.html
The file is physically there though. Is there a different way I should be doing this?
You can't use Html.Partial for this.It is a special helper method for rendering Partial Views. Instead you can add an Action like this:
[ChildActionOnly]
public ActionResult GetHtmlPage(string path)
{
return new FilePathResult(path, "text/html");
}
And you can call it from your View with using Html.Action helper Method:
#Html.Action("GetHtmlPage","controllername", new { path = "~/Test/main.html" })
Follow these steps
Create a view in ~/views/shared folder. give it name test.cshtml.
Copy the content of HTML in it.
Use Html.Partial("test") on page to render the html of that view.
I think it's a better solution:
Use WriteFile from the Response object
#Response.WriteFile(pathToMyHtmlFile)
taken from here
The simple answer is to rename the main.html file to main.cshtml which will be recognized by the Razor view engine for rendering.
You could use this in your cshtml view:
#{this.GetOutputWriter().Write(File.ReadAllText(Server.MapPath("/your/static/file.html")));}
A total different way is just load the file in javascript
<div id="loadId">
</div>
<script>
$(document).ready(function () {
$('#loadId').load('filepath');
});
</script>
You can set the filepath in the controller, or put it in the model, if you want, and use:
$('#loadId').load('#ViewBag.filepath');
Just use an ajax request to fetch the html file output the content into your main html. Since it is an html file, it will be cached in subsequent calls and there will be no performance impact.
I want to use pure html page instead of cshtml with MVC .net.
But when I add view by right clicking Index i can see only two options.
public class HomeController : Controller
{
//
// GET: /Home/
public ActionResult Index()
{
return View();
}}
Cshtml (Razor)
Aspx
I followed
Can I serve .html files using Razor as if they were .cshtml files without changing the extension of all my pages?
forum but still no help. I still don’t see an option to add html instead of cshtml
I also tried adding html page directly to view folder but i dont know how to point that view from my controller function.
Replacing Index.cshtml with Index.html gave me this error
The view 'Index' or its master was not found or no view engine supports the searched locations. The following locations were searched:
~/Views/Home/Index.aspx
~/Views/Home/Index.ascx
~/Views/Shared/Index.aspx
~/Views/Shared/Index.ascx
~/Views/Home/Index.cshtml
~/Views/Home/Index.vbhtml
~/Views/Shared/Index.cshtml
~/Views/Shared/Index.vbhtml
In order to render plain HTML file you can use
return new FilePathResult(HtmlPath, "text/html");
where HtmlPath is
Server.MapPath(string.Format("~/Views/{0}/{1}.html", YourControllerName, YourHtmlfileName))
You can create a View with a regular cshtml file add it to the controller and in the View itself just use pure html and add the following to the top:
#{
Layout = null;
}
This way you use a cshtml file that doesn't use you master layout file. And just serves whatever html you put in it.
If it's a static html file you don't need to point your controller to it, because IIS can serve them just fine. Add an html file to your project (anywhere but NOT in the viewsfolder), and point your browser to that file.
If you right click on your Content folder you can select 'Add new item...'. You can then select 'Web' in the tree on the left and choose the 'HTML Page' on the right.
This should add you an HTML page.
Add a file. Rename it.
F2 in solution explorer.
I'm new to ASP MVC and utilizing the Intro to ASP MVC 4 Beta tutorial http://www.asp.net/mvc/tutorials/mvc-4/getting-started-with-aspnet-mvc4/intro-to-aspnet-mvc-4
I'm encountering an error that I can't seem to find an answer to nor do I have much programming experience so I don't know where to even start to fix this an move on with the tutorial. I appreciate any help you can provide.
I'm in the Accessing Your Model's Data from a Controller section and I am getting this error when I attempt to creat a Movie as a part of the tutorial, I click on the the link "Create New" and I get the following error
The following sections have been defined but have not been rendered for the layout page >"~/Views/Shared/_Layout.cshtml": "Scripts"
Rather than use Visual Studio express, I opted to download Visual Studio 2012 RC (not sure if that would be the root cause of my issue.
I realize you may require me to include code to answer this but I'm not sure what code to even include. Please advise what code you need me to include if any and I will be happy to add it to my question.
Thank you,
It means that you have defined a section in your master Layout.cshtml, but you have not included anything for that section in your View.
If your _Layout.cshtml has something like this:
#RenderSection("scripts")
Then all Views that use that Layout must include a #section with the same name (even if the contents of the section are empty):
#{
ViewBag.Title = "Title";
Layout = "~/Views/Shared/_Layout.cshtml";
}
#section scripts{
// Add something here
}
As an alternative,
you can set required to false, then you won't be required to add the section in every View,
#RenderSection("scripts", required: false)
or also you can wrap the #RenderSection in an if block,
#if (IsSectionDefined("scripts"))
{
RenderSection("scripts");
}
I had a case with 3 levels a'la _MainLayout.cshtml <--- _Middle.cshtml <--- Page.cshtml. Even though doing like this:
_MainLayout.cshtml
<head>
#RenderSection("head", false)
</head>
_Middle.cshtml
#section head {
#RenderSection("head")
}
and in Page.cshtml defining
#section head {
***content***
}
I would still get the error
The following sections have been defined but have not been rendered
for the layout page “~/Views/Shared/_Middle.cshtml”: "head".
Turned out, the error was for the Middle.cshtml to rely on /Views/_ViewStart.cshtml
to resolve it's parent layout. The problem was resolved by defining this in Middle.cshtml explicitly:
#{
Layout = "~/Views/_Shared/_MainLayout.cshtml";
}
Can't decide whether this would be by-design or a bug in MVC 4 - anyhow, problem was solved :)
Also, you can add the following line to the _Layout.cshtml or _Layout.Mobile.cshtml:
#RenderSection("scripts", required: false)
I'm not sure why the accepted answer was accepted if the suggested solution did not and does not solve the issue. There can actually be two related issues related to this topic.
Issue #1
The master page (e.g. _Layout.cshtml) has a section defined and it is required but the inheriting views did not implement it. For example,
The Layout Template
<body>
#* Visible only to admin users *#
<div id="option_box">
#* this section is required due to the absence of the second parameter *#
#RenderSection("OptionBox")
</div>
</body>
The Inheriting View
No need to show any code, just consider that there is no implementation of #section OptionBox {} on the view.
The Error for Issue #1
Section not defined: "OptionBox ".
Issue #2
The master page (e.g. _Layout.cshtml) has a section defined and it is required AND the inheriting view did implement it. However, the implementing view have additional script sections that are not defined on (any of) its master page(s).
The Layout Template
same as above
The Inheriting View
<div>
<p>Looks like the Lakers can still make it to the playoffs</p>
</div>
#section OptionBox {
<a href"">Go and reserve playoff tickets now</a>
}
#section StatsBox {
<ul>
<li>1. San Antonio</li>
<li>8. L. A. Lakers</li>
</ul>
}
The Error for Issue #2
The following sections have been defined but have not been rendered for the layout page "~/Views/Shared/_Layout.cshtml": "StatsBox"
The OP's issue is similar to Issue #2 and the accepted answer is for Issue #1.
I think our solution was sufficiently different from everyone elses so I'll document it here.
We have setup of Main layout, an intermediary layout and then the final action page render. Main.cshtml <- Config.cshtml <- Action.cshtml
Only when web.config had customErrors='On/RemoteOnly' we got a custom error and no exception nor Application_Error was called. I could catch this on Layout = null line in the Error.cshtml. Exception was as in the question, missing scripts section.
We did have it defined in Main.cshtml (with required:false) and Action.cshtml didn't have anything that wrote into the scripts section.
Solution was to add #section scripts { #RenderSection("scripts", false) } to Config.cshtml.
It appears that there is a mismatch between the View files that some versions of Visual Studio auto-generates for you when you use it to create a new Model. I encountered this problem using the new VS 2013 Community Edition and walking through the W3Schools tutorial at http://www.w3schools.com/aspnet/mvc_app.asp but the comments above indicate that its not a problem with the tutorial directions or with a single version of VS.
It is true that you can make the error message go away by just removing the
#Scripts.Render("~/bundles/jqueryval")
line from the create/edit layouts that were autogenerated by Visual Studio.
But that solution does not address the root cause or leave you in a good place to do more than finish walking through the tutorial. At some point (probably fairly early) in the development of a real application, you are going to want access to the jquery validation code that the commenting-out solution removes from your app.
If you use VS to create a new model for you, it also creates a set of five View files: Create, Delete, Details, Edit, and Index. Two of these views, Create and Edit are intended to let the user add/edit data for the fields in database records that underlie the model. For those views in a real app, you will probably want to do some amount of data validation using the jquery validation library before you save the record in the db. That is why VS adds the following lines
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
to the bottom of those two views and not others. The autogenerated code is trying to make the validation library available for those views, but not the others.
The error happens because VS either doesn't add a corresponding line to the shared _Layout.cshtml file or, see one answer above, adds it but leaves it commented out. This line is
#RenderSection("scripts", required: false)
If some of your views have a scripts section (as Create and Edit do), there has to be a RenderSection command embedded in the layout. If some scripts have the section and some do not (as Delete, Details, and Index do not), the RenderSection command has to have the required: false parameter.
So the best solution, if you want to do anything more than just finish walking through the tutorial, is to add the statement to _Layout.cshtml not remove the code from the Edit and Create views.
P.S. It is a bit of a confuser, here, that what is being required is in a 'bundle' and the require statement looks like it is trying to include a file in a bundles folder that does not exist in your project. But, for debug builds and tutorials, that's not relevant since the bundled files get included one at a time. See: http://www.asp.net/mvc/overview/performance/bundling-and-minification The code that is at issue here is mentioned briefly about two-thirds of the way down the page.
It occurs basically when _Layout.cshtml is without:
#RenderSection("scripts", required: false)
or with
#RenderSection("scripts")
WITHOUT
required: false
So, Just add
#RenderSection("scripts", required: false)
in _Layout.cshtml
and it works specially for those developers who works with Kendoui genarated projects.
While working through the ASP.NET MVC 4 Tutorial with Visual Studio 2012 I encountered the same error in the "Accessing Your Model's Data from a Controller section". The fix is quite simple.
When creating a new ASP.NET MVC 4 Web Application in Visual Studio 2012 within the _Layout.cshtml document in the shared folder the "scripts" section is commented out.
#*#RenderSection("scripts", required: false)*#
Simply un-comment the line and the sample code should work.
#RenderSection("scripts", required: false)
I just got that error and I read that the reason behind is you must render a script section. But in _Layout it was already as is.
#RenderSection("Scripts", required: false)
Also it worked before I added the section at the bottom of the page.
The reason in my case was a simple typo in spelling Scripts.
#section Scripts{
<script src="~/js/myScript.js"></script>
}
I have same issue while implementing a tutorial for beginners of MVC. I got various suggestion to modify the #RenderSection in your layout.cshtml file but I havn't use it.
I have search a lot and then I found that the script tag generated in a (View/Edit.cshtml) and other cshtml file is not rendering
**#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}**
So I removed those lines and application start running smoothly.
I have changed the "_Layout.cshtml" like below and it works.
.Net Core 3.1 Blazor Server module Identity issue.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>#ViewBag.Title</title>
<link href="~/css/bootstrap/bootstrap.min.css" rel="stylesheet" />
<link href="~/css/app.css" rel="stylesheet" />
#RenderSection("Scripts", required: false)
</head>
<body>
<div class="main">
<div class="content px-4">
#RenderBody()
</div>
</div>
</body>
</html>
#section Scripts {
}
I have a feeling that you are rendering your section from within an #section in the _Layout file that is referring to a partial view with an #section, i.e. you've nested an #section within an #section. In the _Layout file, remove the #section around the rendersection.
I have also commented **#section Scripts
than it's running smoothly. :)
for me it was that i said script instead of scripts
i dont know why it doesn't show me as an error while debuging it.
#section Script {}
I searched for the error in the web and came to this page.
I am using Visual Studio 2015 and this is my first MVC project.
If you miss the # symbol before the render section you will get the same error. I would like to share this for future beginners.
#RenderSection("headscripts", required: false)
check the speling and Upper/Lower case of term ""
when ever we write
#RenderSection("name", required: false)
make sure that the razor view Contains a section
#section name{}
so
check the speling and Upper/Lower case of term ""
Correct in this case is "Scripts"
Please make sure you have typed correct spelling of using script section in view
the correct is
#section scripts{ //your script here}
if you typed #section script{ //your script here} this is wrong.
I solved this problem by using the following,
#await Html.PartialAsync("_ValidationScriptsPartial")
For me the problem was in my _Layout.cshtml I have RenderSection inside a condition
#if (theme == "Red" || theme == "Green")
{
<div>
#RenderSection("Footer", false)
</div>
}
and in my child view it was without condition
#section Footer{
<div>
#Html.AwButton("Reject", "Reject")
#Html.AwSubmit("Ok", "Ok")
</div>
}
so irrespective of the theme, child was adding the Footer. But in parent when theme is not Red or Green it was not adding the Footer and unhanded exception being thrown.
I have a partial view (.ascx) that should include its own CSS file as it's used in multiple other views. How do I inject a stylesheet in the page server-side, i.e. without using JavaScript?
Dario - due to using this for partialviews, you're going to always have the problem that the <head> section of the document is already in place and therefore can't be modified. If you want to remain WC3 compliant, then you'll have to put any further css into the head section via javascript. This may or may not be desirable (if you've got to cater for downsteam browsers with javascript turned off).
the main problem that you may be aluding to is the fact that you can't put <asp:contentplaceholders> into your partials. this is a pain (tho understandable as the masterpage ref would tie the partial too closely to a particular master page).
To this end, I've created a little helper method that does the basic grunt work to put the css file into the head section automatically.
edit - (as per Omu's js suggestion) this is a nice little halfway house:
// standard method - renders as defined in as(cp)x file
public static string Css(this HtmlHelper html, string path)
{
return html.Css(path, false);
}
// override - to allow javascript to put css in head
public static string Css(this HtmlHelper html, string path, bool renderAsAjax)
{
var filePath = VirtualPathUtility.ToAbsolute(path);
HttpContextBase context = html.ViewContext.HttpContext;
// don't add the file if it's already there
if (context.Items.Contains(filePath))
return "";
// otherwise, add it to the context and put on page
// this of course only works for items going in via the current
// request and by this method
context.Items.Add(filePath, filePath);
// js and css function strings
const string jsHead = "<script type='text/javascript'>";
const string jsFoot = "</script>";
const string jsFunctionStt = "$(function(){";
const string jsFunctionEnd = "});";
string linkText = string.Format("<link rel=\"stylesheet\" type=\"text/css\" href=\"{0}\"></link>", filePath);
string jsBody = string.Format("$('head').prepend('{0}');", linkText);
var sb = new StringBuilder();
if (renderAsAjax)
{
// join it all up now
sb.Append(jsHead);
sb.AppendFormat("\r\n\t");
sb.Append(jsFunctionStt);
sb.AppendFormat("\r\n\t\t");
sb.Append(jsBody);
sb.AppendFormat("\r\n\t");
sb.Append(jsFunctionEnd);
sb.AppendFormat("\r\n");
sb.Append(jsFoot);
}
else
{
sb.Append(linkText);
}
return sb.ToString();
}
usage:
<%=Html.Css("~/Content/yourstyle.Css")%>
or:
<%=Html.Css("~/Content/yourstyle.Css", true)%> // or false if you want!!
worth a back-pocket approach if all else fails. it may also be possible to adapt the logic above to hit an actionfilter and add the css to the reponse headers etc.., rather than outputting the js string.
Is there a reason you cannot just put the stylesheet in the main view page? Unless it is extremely large, it should not cause your page to load significantly slower when not being used, especially after compression.
Furthermore, if the partial view is being retrieved by ajax, you will end up re-downloading the css file multiple times (depending on the browser's caching).
I'm not an ASP.NET or MVC expert, but I am currently working on a project with it. Would it be possible to include something like this in the head of your master page?
<asp:ContentPlaceHolder ID="HeadContent" runat="server"></asp:ContentPlaceHolder>
Then somehow get your CSS into the content placeholder?
<asp:Content ID="styleSheetHolder" ContentPlaceHolderID="HeadContent" runat="server">
<link rel='stylesheet' href='yourstyle.css' type='text/css' />
</asp:Content>
It looks like you'd have to do this from the calling page, which would introduce duplication of code. I'm not sure how to get around that. Maybe it could it be done with an HTML helper.
A place I worked had a site with a lot of conditional partial views, which could and would change from time to time as new things were added to the application. The best way we found was to use naming conventions - naming the partial view, stylesheet and script the same (except extension, of course).
We added one or more stylesheets, scripts and partial views to the page's view model. We then used a custom HTML helper to loop through the relevant array in each content section and insert the required content. The pain was having to manage three or more files for each component, but at least we were able to reduce the amount of maintenance in the hosting pages.
Never did resolve the problem of putting a partial view inside a partial view, though.
Why not put the link tag in your partial view:
<link rel="stylesheet" href="yourstyle.css" type="text/css" />