Data is not passing from Form to controller actions

How to render the data from form to controller actions?

This is my controller:-

class ViewController < ApplicationController
  def index
  end

  def new
    @txt=params[:txt]
  end

end

Index Page:-

<form method='post'action='view/new' >
  <input type="text" name="txt">
  <input type="submit">
</form>

New Page:-

<h1>View#new</h1>
<p>Find me in app/views/view/new.html.erb</p>
<h2>Hello <%= @txt %></h2>
<%= link_to 'index','index' %>

Error after filling text box and cliking the submit button:-

ActionController::InvalidAuthenticityToken in ViewController#new
ActionController::InvalidAuthenticityToken
RAILS_ROOT: D:/projectNetBean/validation

It looks like you are not passing the authenticity token

Are you using form_for in the view?