call method from a component to main component angular2 - html

Question

my issue here is that i have a component that has functions that i want my app.component.html to have access to
book.component.html
<div class="form-inline">
<input id="inputSearchBar" class="form-control mr-sm-2" type="text" placeholder="Search" [(ngModel)]="Text">
<button class="btn btn-outline-info my-2 my-sm-0" type="submit" (click)="onSearch()">Search</button>
</div>
Now this is currently working because i have this line of code on my book.component.html, what i want is to use this on my app.component.html inside the navbar
app.component.html
<header>
<nav class="navbar navbar-toggleable-md navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button"
data-toggle="collapse"
aria-controls="navbarColor01"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarColor01" >
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#" [routerLink]="['']">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" [routerLink]="['about']">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" [routerLink]="['books']">Books</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" >Register</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" [routerLink]="['login']">Login</a>
</li>
</ul>
</div>
</nav>
</header>
I want to have that searchbox as part of my navbar and it being functional, what should i add on my components or what should i do to make it work.

Answer 1

you can use parent and child relation ship here. create component for search bar and add in the Parent component.
1)
create search component like this
#Component({
selector: 'search-component',
})
export class searchcomponent { }
2) Add in the parent HTML
app.component.html
<header>
<search-component> </search-component>
</header>
More info check this link https://angular.io/docs/ts/latest/cookbook/component-communication.html

Answer 2

You can use service for this task:
https://angular.io/docs/ts/latest/cookbook/component-communication.html#!#bidirectional-service