smarty怎么实现i++

<%

                   int i_count = 0; 

                   foreach (GridViewRow row in this.GridView1.Rows)

                   {

                          if (i_count%4 == 0)

                          {

%>

                                 .1..

<%

                          }

                          else

                           {

%>

                                 .2..

<%

                            }

                           i_count ++ ;

                    }

%>

                   {assign var="i_count"}

                   {foreach from=$row item=item}

                   

                          {if $i_count mod 4}

                          

                                 .2..

                        

                          {else}

                           

                                 .1..