ASP.NET 4 Unleashed

Using the AddParsedSubObject() Method

When the ParseChildren attribute has the value false, the contents of a control are automatically added to the control’s collection of child controls (represented by the Controls property). You need understand that all content contained in the control, even carriage returns and spaces, are added to the controls collection.

Any content contained in a control that does not represent a server-side control is parsed into a Literal control. In some cases, you might want to allow only a certain type of control to be added to the Controls collection.

The AddParsedSubObject() method is called as each control is added to the Controls collection. By overriding the AddParsedSubObject() method, you can block certain ...