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New Message on BDOTNET
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From: SitaramanM
Message 8 in Discussion
Hi Suggest that u move th population of the hashtable logic from App start. A rough
sketch is as folows Make the hashtable private in a class Have a Property which
retrieves this Hashtable Inside the property check whether the hashtable is
nothing(which will be the case the first time). If it is null populate this from
Database. return the filled hashtable If hashtable is not null(not first time
hashtable access) then return the hashtable directly Note : You can have this
property as a shared property. take care of synchronisation as there could(will) be
multiple threads accessing this, as it is an asp.net application Wherever you need
to acces the hashtable(for filling up combos), call the type.property. As it is a
property and the first time it will populate from the database, you can write
execption catch functions in the code itself A rough code would be as follows
Class MyHashTableClass
Shared m_objLockObject As New Object
Private Shared m_objHashTable As Hashtable Public Shared ReadOnly Property
MyHashtable() As Hashtable
Get
SyncLock (m_objLockObject)
If m_objHashTable Is Nothing Then m_objHashTable
= New Hashtable
' Write Code to populate HashTable from Database
' Also ensure in the end that if the HashTable Count is still
nothing
' you can probably initialize the HashTable to Nothing.So that
after the if condition is
' finished, the check for nothing will result in an exception
being thrown to the caller
End If if m_objHashTable Is Nothing ' If it is still
nothing ' throw Some Exception else
Return m_objHashTable
End SyncLock
End Get
End Property
End Class Module Module1 Sub Main2() try Dim x as
hashTable=MyHashTableClass.MyHashTable catch l_objException as Exception
'Handle Exception here end try 'Use the HashTable End sub End
Module
hth regards, sr
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