converting hashtable to arraylist

[Alexander Widera]

hello,

how can I convert a hashtable to an arraylist or array? I want to sort the
hashtable... but this isn't posible, so i have to convert it to an
hashtable.

thank you,
alex

 

[Guest]

I see here one big problem:
1. HashTable is indexed with string key but ArrayList and Array have integer
indexer.
2. If you don't care about key in HashTable try this method:
HashTable.CopyTo(Array array, int arrayIndex)

The elements are copied to the Array in the same order in which the
enumerator iterates through the Hashtable.

To copy only the keys in the Hashtable, use Hashtable.Keys.CopyTo.

To copy only the values in the Hashtable, use Hashtable.Values.CopyTo.



http://msdn.microsoft.com/library/d...frlrfsystemcollectionshashtableclasstopic.asp

 

[rashmi.t.agarwal]

Hi,
I was stuck with the similar problem but I wanted to convert Hashtable to List<> so that I can save both key and corresponding value.Is this possible?


Regards,
Rashmi
greatdevelopers.com

 

[elizas]

How To Iterate the Hashtable in C#

If we write in the same way as above for the hashtable then we would not get the desired values.

Hashtable ss = new Hashtable();
ss["key1"] ="india";
ss["key2"] = "bharat";

foreach (object gg in ss)
{
Console.WriteLine("Key value is " + gg);
Console.Read();
}

Here we get System.Collections.DictionaryEntry and System.Collections.DictionaryEntry as output instead of the value pairs stored in the hashtable.

In this case we can help of DictinaryEntry object for iterating the hashtable.

foreach(DictionaryEntry gg in ss)
{
Console.WriteLine("Key and value are " + gg.Key + " " + gg.Value);
Console.Read();
}

A Dictionary Entry is simply a container containing the Key and Value .