How to pass contact id and contact lookup fields in to visual force page?

Question

I want auto populate contact and account fields when ever we create Opportunity record from contacts related list. But below was not giving as expected results...please anyone make correct.

PageReference pr = new PageReference('/apex/OppVfPage?CF00N40000002fEB2={!Contact.Name}&CF00N40000002fEB2_lkid={!Contact.Id}&conid={!Contact.Id}');

after page opens the contact or account fields were not populated and the URL displays like...

https://c.cs15.visual.force.com/apex/OppVfPage?CF00N40000002fEB2=%7B%21Contact.Name%7D%3FCF00N40000002fEB2_lkid%3D%7B%21Contact.Id%7D%3Fconid%3D%7B%21Contact.Id%7D

Answer 1

You are trying to create PageReference - and its constructor accepts String. But String is not a Formula, merge fields will not be populated. You must either format string properly or set parameters:

PageReference yourPage = Page.YourPage;
yourPage.getParameters().put('Id', contact.Id);
return yourPage;

OR

PageReference yourPage = new PageReference('/apex/YporPage?Id=' + contact.Id); 
return yourPage;