Copy a hashtable

[Ray Cassick \(Home\)]

I have a hashtable in a class that contains key (strings) value (integers,
strings, longs, etc...) data pairs.

I want to move the data to another (different) class instance for
processing.

The key is that I want to make sure I don't rely on the first class to stay
around so I want to make sure that when I move (copy) the data from one
class to another I get a REAL copy, not just a reference to the node in the
first hashtable.

Basic looks of what I would like is below:

Public class Foo

private mDatastore as new hashtable

public sub AddData(. . .)

 

[Cor Ligthert [MVP]]

Ray,

The most simple way to deepcopy an object is first to serialize it and than
to deserialize it. Here a sample for an arraylist. It has for that to
implement Iserializable

http://www.vb-tips.com/default.aspx?ID=7ffd296f-9e81-47e6-88dc-61641f5c8d9d

The hashtable implements Iserializable as well.

I hope this helps,

Cor

 

[Brian Gideon]

Ray,

If you can guarentee that the items in the dictionary implement
ICloneable then you can do the following.

For Each item as DictionaryEntry in sourceDictionary
Dim cloneable as ICloneable = DirectCast(item.Value, ICloneable)
destinationDictionary.Add(item.Key, cloneable.Clone())
Next

Brian