Use the Reflection Method to allow the user control to dynamically call the parent page

The following shows how the user control calls the setlaeble method on the parent page.
The parent page type is obtained using the reflection method, which avoids the problem of type conversion when different pages call the same (no need to write many cases :)).

Of course, another method is to implement an interface on the parent page, that is, to implement the setlabel method. UC can convert this. Page to this interface.

User Control: Private void button#click (Object sender, system. eventargs E)
{
// Use the Reflection Method to dynamically call the parent page
System. Web. UI. Page P = This. page;
Type pagetype = P. GetType ();
Methodinfo MI = pagetype. getmethod ("setlabel ");
Mi. Invoke (p, new object [] {"you big pig! "});

}

Parent page:

Public void setlabel (string Str)
{
This. label1.text = STR ;;
}