How vf controller redirect to another page

Question

I have a Apex Controller for a VF page. I want to redirect my page to another one, only if I cannot get a specific parameter from the URL. current page: /apex/profile?uname='test;, if i get the null value from the url then it's redirect to /apex/home page.below is my code.

public class HomePageController {

public HomePageController()
{
  String unameParam = ApexPages.currentPage().getParameters().get('uname');
  if(unameparam == null)
  {
    // calling logout method to redirect to home page.      
    Logout();
  }
}

public PageReference Logout() {
         System.debug('RCHOME ###');
         PageReference mainHome= Page.rc_home; 
         mainHome.setRedirect(true);
         return mainHome;
}

if i get the null value from url it's executing Logout() method successfully but it's not redirecting to home page.

Could you please help on this.

Answer 1

You can not redirect user from controller> Call this method from Page's Action attribute and check value of URL and if it is null then redirect it to home page. It will work for you. Code sample

public HomePageController()
{
  String unameParam = ApexPages.currentPage().getParameters().get('uname');
  if(unameparam == null)
  {
    // calling logout method to redirect to home page.      
    Logout();
  }
}

public PageReference Logout() {
     String unameParam = ApexPages.currentPage().getParameters().get('uname');
  if(unameparam == null)
  {
         System.debug('RCHOME ###');
         PageReference mainHome= Page.rc_home; 
         mainHome.setRedirect(true);
         return mainHome;
}
}