Visualforce : Render Page PDF

There are requirements when you need to display, page as PDF, Visualforce supports that as follows,

<apex:page renderas="pdf"  controller="MyController1">
......
</apex:page>

In addition to that you can you can render page dynamically, as following

Page:

<apex:page renderas="{!renderTypeVal}" controller="MyController1">
......
</apex:page>

Controller Class:

public class MyController 

{ 

 public String getRenderTypeVal()

 {

    // Add your condition for return Value

    //When rendering is required as NON PDF 

    //return null;

    //When rendering is required as PDF

    //reurntun 'pdf';

    return null; 

 }   

}