c# - find out whether a panel is visible or not -

I used an ASP.NET Wizard control where I have used several panels in a wizard step. Each panel has a square that is a style display: None. When the user clicks on the "+" button, I toggle the class and change the visibility in the display: block and it works fine. Now I tried to read the values ​​of controls from the panel Controls whose panels are set to appear. But it does not seem to work that it looks correct for all the panels, even if there is a style display in it: any

I tried to do this:

  if ((this.Form.FindControl ("ContentPlaceHolder1"). FindControl ("wizard"). FindControl ("panel" + i).) Visible {// where I count current. A constant command like Panel 1, Panel 2, etc. ... executes this code, even if the panel is hidden in the browser)    
 
 
 style  display  and control  visibility  are two different t hings.  
 If you set control to  visible = 'false' ; The server does not send / control this control at all on the client side. Display Style  on the other side: None  No; This will not be shown just because of CSS style.  
 then  display: none ! =  Visible = 'false' .  
 If you need a post code that  display  is set to  none ; You can add  hidden field  next to your  panel ; Set its value with javascript in  visible  /  hidden  and then set the value of  hidden files  to determine visibility on the server side. Please.