Finding control on pages that inherits from base page

Question

In my project all of the .aspx pages inherit from a custom base class page which in turn inherits from System.Web.UI.Page. I want to find the controls in current page. for that one I am using foreach loop

foreach(control c in page.controls)

for this I am unable to cast my current page to system.web.ui.page. how to cast the current page to system system.web.ui.page?

Answer 1

Please note that you are dealing with a control-tree, so you might want to have a recursion here. Following method should help (Linq with a recursive call):

private static IEnumerable<Control> FlattenControlTree<TFilterType>(Control control)
{
    if (control is TFilterType)
    {
        yield return control;
    }
    foreach (Control contr in control.Controls.Cast<Control>().SelectMany((c) => FlattenControlTree<TFilterType>(c)))
    {
        if (contr is TFilterType)
        {
            yield return contr;
        }
    }
}

By the end of the day, you only need to call:

var controls = FlattenControlTree<YourBaseType>(this.Page);

Please note that this kind of recursion is not very effective when it comes to big trees.

Answer 2

You may try this;

foreach(Control c in ((System.Web.UI.Page)this.Page).Controls)