Hashtable : how to add a reference ?

  • Thread starter Thread starter cybertof
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cybertof

Hi !

I have a class instance named MyObject (instance of CObject class).

I would like to add a reference (not a copy) to it as an hashtable
value.

I use this code :

MyHashTable.Add("key1", MyObject)


If I do the following :

MyHashTable["key1"] = null

only the object in the hashtable is 'nulled'.


Is there a special syntax to add the reference and not a copy of the
object ?


Regards;
Cybertof.
 
Hi cybertof,
Hi !

I have a class instance named MyObject (instance of CObject class).

I would like to add a reference (not a copy) to it as an hashtable
value.

I use this code :

MyHashTable.Add("key1", MyObject)
Click to expand...

This is what you want to do.
Your hashtable contains reference *MyObject* with key: "key1".
If I do the following :

MyHashTable["key1"] = null

only the object in the hashtable is 'nulled'.
Click to expand...

This means that your *MyObject* reference was removed from
position marked by "key1".
Is there a special syntax to add the reference and not a copy of the
object ?
Click to expand...

Your object *MyObject* is not copied in your example.

Regards

Marcin
 
Yes it is, because when i 'null' it, the 'value' in the hashtable is
effectively null, but the original MyObject still exists.

Any Idea ?

Regards,
Cybertof.
 
cybertof said:
Yes it is, because when i 'null' it, the 'value' in the hashtable is
effectively null, but the original MyObject still exists.
Click to expand...

What is in the hashtable is a reference to an *object*, not a reference
to a *variable*. Changing the value of the variable won't change the
hashtable, but any changes you make to the object itself are visible
through the reference stored in the hashtable.
 
Which 'variable' are you talking about ?


What is in the hashtable is a reference to an *object*, not a reference
to a *variable*. Changing the value of the variable won't change the
hashtable, but any changes you make to the object itself are visible
through the reference stored in the hashtable.
Click to expand...
 
cybertof said:
Which 'variable' are you talking about ?
Click to expand...

The variable called MyObject, as used in the line of code:

MyHashTable.Add("key1", MyObject);
 
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