c# - show existing selection for dynamic checkbox -

i creating checkboxes dynamically , want show existing selection or want check them dynamically.this code create checkboxes

    private void role()     {         systemuserdal dal = new systemuserdal();         var roles = dal.getroleslist();         foreach (keyvaluepair<guid, string> r in roles)         {              checkbox chk = new checkbox();             chk.id = r.value;             chk.text = r.value;             rolepanel.controls.add(chk);         }     } 

i have

      protected void page_load(object sender, eventargs e)     {         if (!ispostback)         {             systemuserdal dal = new systemuserdal();             var userid = guid.parse(request.querystring["id"].tostring());             var user = dal.getsystemuserbyid(userid);             if (user != null)             {                 role();                 var role = user.roles;                   textuserid.text = user.userid.tostring(); 

user.roles has roles particular user assigned. how can mark dynamically created checkboxes?

i tried still dint work role has more 1 value in it

    private void role(string role)     {         systemuserdal dal = new systemuserdal();         var userid = guid.parse(request.querystring["id"].tostring());         var roles = dal.getroleslist(userid);         foreach (keyvaluepair<guid, string> r in roles)         {              checkbox chk = new checkbox();             chk.id = r.value;             chk.text = r.value;             if (role == r.value)             {                 chk.checked = true;              } rolepanel.controls.add(chk);         }     } 

probably rewrite roles() function

foreach (keyvaluepair<guid, string> r in roles) {      checkbox chk = new checkbox();     chk.id = r.value;     chk.text = r.value;      if(user.isinrole(r.value))        chk.checked = true;      rolepanel.controls.add(chk); } 

a better alternative use <asp:checkboxlist /> control

<asp:checkboxlist id="roleslist" runat="server"> </asp:checkboxlist> 

code-behind

for (int = 0; < roleslist.items.count; i++) {     if (user.isinrole(roleslist.items[i].value))        roleslist.items[i].selected = true; }