本文整理匯總了VB.NET中System.Threading.ReaderWriterLockSlim.EnterUpgradeableReadLock方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET ReaderWriterLockSlim.EnterUpgradeableReadLock方法的具體用法？VB.NET ReaderWriterLockSlim.EnterUpgradeableReadLock怎麽用？VB.NET ReaderWriterLockSlim.EnterUpgradeableReadLock使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Threading.ReaderWriterLockSlim的用法示例。
在下文中一共展示了ReaderWriterLockSlim.EnterUpgradeableReadLock方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: AddOrUpdate
Public Function AddOrUpdate(ByVal key As Integer, _
ByVal value As String) As AddOrUpdateStatus
cacheLock.EnterUpgradeableReadLock()
Try
Dim result As String = Nothing
If innerCache.TryGetValue(key, result) Then
If result = value Then
Return AddOrUpdateStatus.Unchanged
Else
cacheLock.EnterWriteLock()
Try
innerCache.Item(key) = value
Finally
cacheLock.ExitWriteLock()
End Try
Return AddOrUpdateStatus.Updated
End If
Else
cacheLock.EnterWriteLock()
Try
innerCache.Add(key, value)
Finally
cacheLock.ExitWriteLock()
End Try
Return AddOrUpdateStatus.Added
End If
Finally
cacheLock.ExitUpgradeableReadLock()
End Try
End Function示例2:
Public Enum AddOrUpdateStatus
Added
Updated
Unchanged
End Enum