I am trying to update an ASP.NET MVC app on .NET 4.8 to use Bootstrap 5.1.
I followed this steps:
- Generate an ASP.NET Web Application (.NET Framework) application.
- Update Bootstrap using NuGet Package Manager from version 3.4.1 to version 5.1.3
- Installed popperjs/[email protected] using Add/Client-Side Library / jsdelivr
- Create a ScriptBundle to popperjs/[email protected]
- Change _Layout.cshtml
BundleConfig class:
public class BundleConfig
{
public static void RegisterBundles(BundleCollection bundles)
{
.....
bundles.Add(new ScriptBundle("~/bundles/popperCore").Include(
"~/lib/popperjs/core/dist/cjs/popper.min.js"));
bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
"~/Scripts/bootstrap.js"));
......
}
}
OLD _Layout.cshtml:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>@ViewBag.Title - My ASP.NET Application</title>
@Styles.Render("~/Content/css")
@Scripts.Render("~/bundles/modernizr")
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
@Html.ActionLink("Application name", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li>@Html.ActionLink("Home", "Index", "Home")</li>
<li>@Html.ActionLink("About", "About", "Home")</li>
<li>@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>
@Html.Partial("_LoginPartial")
</div>
</div>
</div>
<div class="container body-content">
@RenderBody()
<hr />
<footer>
<p>© @DateTime.Now.Year - My ASP.NET Application</p>
</footer>
</div>
@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)
</body>
</html>
NEW _Layout.cshtml:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>@ViewBag.Title - DosMy ASP.NET Application</title>
@Styles.Render("~/Content/css")
@Scripts.Render("~/bundles/modernizr")
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<div class="container">
@Html.ActionLink("Application name", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item">@Html.ActionLink("Home", "Index", "Home", new { @class = "nav-link" })</li>
<li class="nav-item">@Html.ActionLink("About", "About", "Home", new { @class = "nav-link" })</li>
<li class="nav-item">@Html.ActionLink("Contact", "Contact", "Home", new { @class = "nav-link" })</li>
</ul>
</div>
</div>
</nav>
<div class="container body-content">
@RenderBody()
<hr />
<footer>
<p>© @DateTime.Now.Year - My ASP.NET Application</p>
</footer>
</div>
@Scripts.Render("~/bundles/popperCore")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)
</body>
</html>
with bundles, I get this error message:
System.NullReferenceException: Object reference not set to an instance of an object
If I use bootstrap.bundle.min.js cdn, it works fine.
<!DOCTYPE html>
<html>
<head>
....
</head>
<body>
....
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>
@RenderSection("scripts", required: false)
</body>
</html>
If I used popper/core and bootstrap.min.js cdn it does NOT work.
<!DOCTYPE html>
<html>
<head>
....
</head>
<body>
....
<script src="https://cdn.jsdelivr.net/npm/@popperjs/[email protected]/dist/umd/popper.min.js" integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js" integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous"></script>
@RenderSection("scripts", required: false)
</body>
</html>
I don't know why it is not working with bundles? And how to solve this problem?
Can you try change:
BundleConfig class:
I try it and done with Bootstrap 5