Injected Page is null

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After upgrading an angular nativescript project to the current versions of angular, typescript, tns, etc.. I'm getting a runtime error stating:

TypeError: Cannot set property 'actionBarHidden' of null at new AppComponent...

The code that previously worked to hide the action bar looks like this:

import {Page} from "tns-core-modules/ui/page";

export class AppComponent implements OnInit, AfterViewInit {

    constructor(page: Page) {
        page.actionBarHidden = true;
    }
}

Why is page null after the injection?


In the earlier versions the root was always a Frame, so by default there will be a Page.

But with the latest version, you are allowed to define flexible root components and any number of frames (page-router-outlet) within your app. So there won't be a default Frame / Page created within app component. Page can be injected only into the components those are loaded inside the page-router-outlet.

The Web Application Security Consortium / Null Byte Injection, Null Byte Injection. Page history last edited by Robert Auger 10 years, 5 months ago. Project: WASC  It seems to be related to Autofac attempting to read Page.Title to see if it is truly "unset" before injecting it. However, that throws an exception. Not sure when this happened. Might have been when we switched to.NET 4.6.1, but could also be when we updated Autofac to version 4.


If TLDR the above link, the quick fix for me was to replace:

<router-outlet></router-outlet> with <page-router-outlet></page-router-outlet>

in app.component.html

Injection FAQ, The page parameter is set in the Java class, and the informal  Is it issue with all website or specific website? Try go to start and type internet explorer and then chose Internet Explorer (no Add-on), see if it is the same. Open Internet Explorer and go to tools->internet option and then advance tab and click reset. Did this solve your problem?


Moving code to ngOnInit solved it for me

Solved: Problem with @inject annotation in a sling model, Solved: Hi everyone, I have a issue with @inject annotation, I try to inject the I try to inject the Resource object inside a Sling Model, but when I debug the code it's null. To get page I always prefer PageManager and resourceResolver  I guess, I found the reason, why injected Instance of Credentials returns null: When rendering the page login, then my debug-console views this: 11:39:43,430 INFO [STDOUT] @PostConstruct 11:39:43,430 INFO [STDOUT] Credentials was created. 11:39:43,430 INFO [STDOUT] @PostConstruct 11:39:43,430 INFO [STDOUT] Loginwas created.


ASP.NET Core Blazor dependency injection, @page "/customer-list" @using Services @inject IDataAccess DataRepository @​if (customers != null) { <ul> @foreach (var customer in  Null Byte Injection. Null Byte Injection is an active exploitation technique used to bypass sanity checking filters in web infrastructure by adding URL-encoded null byte characters (i.e. %00, or 0x00 in hex) to the user-supplied data.


Mail: Blocked for SQL Injection in query string! HELP!, Gennaio 20, 2019 10:29pm 176.121.14.189 (Ukraine) Blocked for SQL Injection in query string: page=xxx_yyy_zzz%' UNION ALL SELECT NULL,NULL,NULL  Null Injection. A downloadable game for Windows. Hackers have invaded the system! Fight your way through hoards of enemies and try not to get killed doing it


Using Burp to Exploit SQL Injection Vulnerabilities: The UNION , When we inject 8 NULLs, the page displays the content without any issues and there are no error messages. When we add a 9th NULL to the query, the  SQL injection UNION attacks Twitter WhatsApp Facebook Reddit LinkedIn Email When an application is vulnerable to SQL injection and the results of the query are returned within the application's responses, the UNION keyword can be used to retrieve data from other tables within the database.