title: How to reload component in angular4
body: <p>I have worked on angular 4 applications. My requirement is:- 
  I have a search button on header component and if I search anything, go to search component and display the result. But when I search again in the  header, it does not reload the search component.</p>
  
  <p>Please tell us how to reload the component on click search button. </p>