Ah, my bad:

new TextField('PrixMin', 'Prix Min', $PrixMin),
new TextField('PrixMax', 'Prix Max', $PrixMax)

If you want to create the vars in a template, you will need to create a method in your page to return the postVars.

something like:

function PrixMinPostVar(){
  if(isset($this->request)){
    return $this->request->postVar('PrixMin');
  }
}

1. Should I put this in BienImmo.php (DataObject) or in ListeBiens.php (Page where I show BienImmos) ?

2. After that, will I access the variable like this ?

<% control PrixMinPostVar %>
 $PrixMin
 <% end_control %>
 

3. Can I add more variables in the function, like this :

	function PrixMinPostVar(){
		if(isset($this->request)){
			return $this->request->postVar('PrixMin');
		}
		if(isset($this->request)){
			return $this->request->postVar('PrixMax');
		}
		if(isset($this->request)){
			return $this->request->postVar('Loc_Ville');
		}
	}
 

4. In the Loc_Ville case, does it return an array ? How do I handle it in the template ?

I know, I have a lot of questions :) but "One knowing is better than Ten searching" !