Casting Enumerator?!?

mdoland · 12-10-2007, 03:56 AM

I have implemented a Properties class that may contain name-value pairs. They are stored in a Hashtable. Now I want to implement this function:
Enumerator<string> PropertyNames();

How do I do that? When I do GetEnumerator on the Hashtable inside the Properties class, I get a Enumerator<Hashtable.Keys> back. How do I return Enumerator<string>?

Code:

namespace qwerty 
{

Class Properties
{
private   Hashtable mHashtable = new Hashtable();

public    Enumerator<string>  PropertyNames()
{


}


public AddProp(string Name, string Value)
{
   mHashtable.Add(Name, Value); 
   return;
}




}



}

Magos · 12-10-2007, 05:43 AM

Make your own enumerator class (which implements System.Collections.IEnumerator) which is returned from the properties class. It should have 3 methods: Reset, MoveNext and Current.get. To allow your properties class to be used directly in an foreach statement make sure it implements System.Collections.IEnumerable.

12-10-2007, 03:56 AM	#1
mdoland Registered User Join Date: Nov 2005 Posts: 41	Casting Enumerator?!? I have implemented a Properties class that may contain name-value pairs. They are stored in a Hashtable. Now I want to implement this function: Enumerator<string> PropertyNames(); How do I do that? When I do GetEnumerator on the Hashtable inside the Properties class, I get a Enumerator<Hashtable.Keys> back. How do I return Enumerator<string>? Code: namespace qwerty { Class Properties { private Hashtable mHashtable = new Hashtable(); public Enumerator<string> PropertyNames() { } public AddProp(string Name, string Value) { mHashtable.Add(Name, Value); return; } } }
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12-10-2007, 05:43 AM	#2
Magos Confused Join Date: Sep 2001 Location: Sweden Posts: 3,125	Make your own enumerator class (which implements System.Collections.IEnumerator) which is returned from the properties class. It should have 3 methods: Reset, MoveNext and Current.get. To allow your properties class to be used directly in an foreach statement make sure it implements System.Collections.IEnumerable. __________________ MagosX.com Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.
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