Finite Epiphany » webforms http://finite.mikeandcorinne.com Mike's thoughts on programming and tech Fri, 05 Mar 2010 23:28:51 +0000 en hourly 1 http://wordpress.org/?v=3.0 An indexed foreach for .aspx Web Forms http://finite.mikeandcorinne.com/2008/03/an-indexed-foreach-for-aspx-web-forms/ http://finite.mikeandcorinne.com/2008/03/an-indexed-foreach-for-aspx-web-forms/#comments Tue, 11 Mar 2008 17:21:37 +0000 Mike Thomas http://www.mikeandcorinne.com/finite/2008/03/11/an-indexed-foreach-for-aspx-web-forms/  Nick blogged about why ASP.Net Repeaters Suck the other week and talked about using foreach loops in your .aspx.  I love this and have been doing it for a while – the strong typing and consice syntax is great.  However, sometimes I need format data based on odd and even rows…

 <table>
   <tr class='Row'><td></td></tr>
   <tr class='AltRow'>...</tr>
</table>

To accomplish this I created a helper function in the page code behind:

protected void Foreach<T>(IEnumerable<T> enumerable, Proc<T, int> action){
 int i = 0;
 foreach(T t in enumerable){
    action(t, i);
  i++
}
}

Then in the .aspx

<%Foreach(People, (person, i) => { %>
  <tr class='<%=i%2==0 ?  "Row" : "AltRow"%>'><td><%=person.FullName%></td></tr>
<%});%>


Just what I needed!

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