@Scripts.Render("~/bundles/bootstrap") is throwing NullReferenceException

Question

I am working on this ASP.NET MVC project. I did not do any changes to the _Layout.cshtml or BundleConfig.cs or Web.config. When I ran the project, it is showing the below exception:

System.NullReferenceException: 'Object reference not set to an instance of an object.' [External Code] ASP._Page_Views_Shared__Layout_cshtml.Execute() in _Layout.cshtml

I tried the minification method but still it failed. If it is possible to view, please check the photos below.

Can somebody help me resolve this issue, please?

Picture01

Picture02

Pciture03

Can you show the code in ASP._Page_Views_Shared__Layout_cshtml? — Thomson Mixab, Jul 18 '21 at 18:00
Could you try to remove ```@Scripts.Render("~/bundles/bootstrap")```? — Chris Wong, Jul 19 '21 at 01:53
Same here after updating Nuget packages for a Web API project couple years old. — Jay, Sep 02 '21 at 07:36

score 5 · Answer 1 · edited Oct 12 '21 at 05:36

5

Replace the following:

bundles.Add(new ScriptBundle("~/bundles/mybundle").Include(
            "~/Scripts/...",
            "~/Scripts/..."));

with this:

bundles.Add(new Bundle("~/bundles/mybundle").Include(
            "~/Scripts/...",
            "~/Scripts/..."));

edited Oct 12 '21 at 05:36

Tomerikoo

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answered Oct 11 '21 at 19:34

Akanksha

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score 3 · Answer 2 · edited Dec 30 '21 at 18:12

3

In the method BundleConfig.RegisterBundles I replaced all existing instantiation of ScriptBundle to instances of Bundle and it worked as expected.

edited Dec 30 '21 at 18:12

Peter Csala

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answered Dec 30 '21 at 13:21

LJILJANA

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score 2 · Answer 3 · answered Sep 02 '21 at 09:35

Same issue here with an older Web API project after upgrading all NuGet packages, specifically to Bootstrap 5.1

The same happens on a new default Web API project in VS 2019 after upgrading its packages to Bootstrap 5.1 - NullReferenceException in _Layout.cshtml!

Apparently dependencies for Bootstrap 5.1 are not yet handled propery by ASP.NET projects -
Downgrading (via VS Nuget Manager) to the last available 4.x version solved the issue for my projects.

score 1 · Answer 4 · answered Oct 21 '21 at 06:19

The suggested solution provided by Akanksha resolved the originally described problem after I upgraded an older ASP.NET WebAPI project from Bootstrap 3.x to 5.1.x

In the method BundleConfig.RegisterBundles I replaced all existing instantiation of ScriptBundle to instances of Bundle and it worked as expected.

            bundles.Add(new Bundle("~/bundles/bootstrap").Include(
                      "~/Scripts/bootstrap.js",
                      "~/Scripts/respond.js"));

Thanks!

@Scripts.Render("~/bundles/bootstrap") is throwing NullReferenceException

4 Answers4