c# - how to save dynamic check box changes -

i have few check boxes created dynamically , existing selections shown when user makes changes want store them back. here code generates , selects dynamically

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.contains(r.value))        {           chk.checked = true;        }         rolepanel.controls.add(chk);    } } 

i trying following

private void getcheckboxes() {     foreach (control ctrl in rolepanel.controls)     {         checkbox c = ctrl checkbox;         string id = c.id;         string role = c.text;     } } 

when step through code hits foreach loop count of 3, ctl null. clues?

you getting error because rolepanel.fiondcontrol("chk") returned null because didn't find control id="chk". method findcontrol takes string - id of control you're looking for. checkboxes added don't have id="chk", have id=r.value code. suggest come schema ids can use later find checkboxes.

if rolepanel contains dynamically added checkboxes, can use rolepanel.controls of them.

don't forget cast controls checkbox.

so getcheckboxes() like:

private void getcheckboxes() {     foreach (control ctrl in rolepanel.controls)     {         if (ctrl checkbox)         {             checkbox c = ctrl checkbox;             string ctext = c.text;              // need ctext, or checkbox c         }     } }