Question

I cannot find the checkboxes within Panel. Here is my code. On page load I add dynamically controls. It loads all controls properly:

if(!Page.IsPostBack){
foreach (var chk in chks)
{
   PlSettings.Controls.Add(new LiteralControl("<div class=\"Controls\">"));

   PlSettings.Controls.Add(chk);

   PlSettings.Controls.Add(new LiteralControl("</div>"));
}
}

On button update, I would like to loop through all controls within panel, and if type of checbox, check if it’s checked or not.

foreach (var panelctrl in PlSettings.Controls)
            {

                  if (panelctrl.GetType() == typeof(CheckBox))
                   {
                      var checkbox = (CheckBox)chk;

                      if (checkbox.Checked)
                       {
                                userSettings.Add(Convert.ToInt32(checkbox.ID));
                       }
                   }

            }

For some reason Panel has only one literal control. and no controls within.

Answer 1

Update the foreach with this code:

// if(!Page.IsPostBack){
foreach (var chk in chks)
{
   PlSettings.Controls.Add(new LiteralControl("<div class=\"Controls\">"));

   PlSettings.Controls.Add(chk);

   PlSettings.Controls.Add(new LiteralControl("</div>"));
}
//}

You must add dynamic controls on every postback. Also, make sure this is done during init or preinit stage.