Question

I am having a number of panels in my page in which I am collecting user information and saving the page details. The page panel has textbox, dropdown list, listbox.

When I need to come to this page. I need to show the Page if these controls have any values. How to do this?

Answer 1

It boils down to enumerating all the controls in the control hierarchy:

    IEnumerable<Control> EnumerateControlsRecursive(Control parent)     {         foreach (Control child in parent.Controls)         {             yield return child;             foreach (Control descendant in EnumerateControlsRecursive(child))                 yield return descendant;         }     } 

You can use it like this:

        foreach (Control c in EnumerateControlsRecursive(Page))         {             if(c is TextBox)             {                 // do something useful             }         }