How to Auto populate account name

Question

I'm stuck and want a way to solve a problem . The requirement is when i click on custom button it should redirect me to the Contact page WITH auto populate Account field. I've reach with the redirect and stucked with auto populate . How do i do it ? Thanks in advance. Any modifications with my code would be helpful.

<apex:page standardController="Contact" extensions="NewContact">
  <apex:form >
<apex:pageBlock title="New Contact " mode="edit">
 <apex:pageBlockButtons >
    <apex:commandButton action="{!Cancel}" value="Cancel"/>
  </apex:pageBlockButtons>

<apex:pageBlockSection title="Contact Details" columns="2">
  <apex:CommandButton action="{!NewImplementation}" value="New Implementation" />
</apex:pageblocksection>

  == Class==


  public class NewContact {

   public NewContact(ApexPages.StandardController controller) {
   }
   public PageReference NewImplementation() {
     PageReference secondPage = new PageReference ('/003/e');
     secondPage.setRedirect(true);        
     return secondPage; 
    }
}

Answer 1

To pre-populate a field you can use some url parameters. The process is described in this blog article:

http://simplysfdc.blogspot.de/2012/11/custom-button-to-prepulate-field.html

There is also a youtube video which explains the process:

https://www.youtube.com/watch?v=_WHpTOF3bFo

Suggestion

In your case you have to add 2 parameters to the PageReference url. like

PageReference secondPage = new PageReference ('/003/e?MYFIELDID_lkid=ACCOUNT_RECORD_ID&MYFIELD_ID=ACCOUNT_Name');

Replace MYFIELDIDwith the account field ID. The ACCOUNT_RECORD_ID with your account ID and ACCOUNT_NAME with the account name.