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Yratelev

C# foreach with Hashtables

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Hi, Im having a bit of trouble getting my stuff out of hashtables im using: Bob bob = new Bob(); Hashtable vHash = new Hashtable(); vHash.Add(bob); foreach(Bob b in vHash) b.ABobMemberFunction(); But I get a System.InvalidCastException and when i change it to foreach(object b in vHash) b.GetType() it turns out the type is System.Collections.DictionaryEntry, and I cant get to the Bob object. Any ideas thanks Yratelev

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An entry in the hashtable is of the type DictionaryEntry (an entry is a key, value pair). You can use the according properties of the DictionaryEntry to access what you want.

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Hello,

You possibly shouldn''t be using Hashtables if you want to iterate through the list like that. An ArrayList might be a better choice.

However, to get your desired effect, try this:

foreach (DictionaryEntry entry in vHash)
{
Bob b = (Bob) entry.Value;
}

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quote:
Original post by Yratelev
vHash.Add(bob);



Well, the hashtable does not have an Add method with that signature. You always have key-value pairs.

Furthermore: you can iterate through either the keys or the values by using the Keys or Values property, e.g.

foreach(Bob b in vHash.Values)
{
b.ABobMemberFunction();
}


If the "Bob"s are keys in the hashtable use vHash.Keys instead

Regards,
Andre (VizOne) Loker

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