asp.net - How can itereate through checkboxes using forlopp in C#? -

i need check whether checkbox values ticked or not using 'for' loop.

checkbox chkbox = (checkbox)tab_patients.controls[chk + i]; 

from searches got line. tab_patients denote ?`

 string chk = "checkbox";     (int = 1; < 13; i++)     {         (int k = 1; k < 4; k++)         {             // checkbox chkbox = (checkbox)tab_patients.controls[chk + i];             checkbox cb = (checkbox)this.page.form.findcontrol("chk"+i.tostring());              if(cb.checked==true)              {                 check = + "0" + k;                }          }} 

make life easier , create checkboxes checkboxlists: http://msdn.microsoft.com/de-de/library/system.web.ui.webcontrols.checkboxlist.aspx

<asp:checkboxlist id="someelement" runat="server"                                     autopostback="true"                                    repeatcolumns="4"                                    enableviewstate="true"> </asp:checkboxlist> 

with repeatcolumns property telling element, infact want 4 columns, control devide 32 elements 4 , group checkboxes pack of 8.

after this, can iterate through every list this:

foreach(var cb in checkboxlistid)  {   if(cb.checked)   {      //do   } } 

on top of that, here old code showing how fill checkboxlist data fetched sql-query. can ignore if expression, checking if there cached data, fill checkboxes.

using (oledbconnection connection = new oledbconnection(configurationmanager.connectionstrings["database"].connectionstring))         {             string query = @"select * level";             oledbcommand command = new oledbcommand(query, connection);             if (session["savedlevelitems"] != null)                 {                     checkboxlistlevel.items.clear();                     list<listitem> sessionlist = (list<listitem>)session["savedlevelitems"];                     foreach (var item in sessionlist)                     {                         try                         {                             checkboxlistlevel.items.add(item);                         }                         catch { }                      }                 }             else             {                 connection.open();                 checkboxlistlevel.datatextfield = "bez_level";                 checkboxlistlevel.datavaluefield = "id_level";                 oledbdatareader listreader = command.executereader();                 checkboxlistlevel.datasource = listreader;                 checkboxlistlevel.databind();                 listreader.close(); listreader.dispose();             }         }