我通常是一个c#程序员,但是现在我正在VB中为这个项目工作,当我用来设置一个单例类时,我将遵循Jon Skeet模型
public sealed class Singleton
{
static Singleton instance = null;
static readonly object padlock = new object();
Singleton()
{
}
public static Singleton Instance
{
get
{
lock (padlock)
{
if (instance == null)
{
instance = new Singleton();
}
return instance;
}
}
}
//Added to illistrate the point
public static void a()
{
}
public void b()
{
}
}
或者现在的变化之一,如果我在c#
Singleton.Instance.什么程序是所有的成员不是静态的,而不是一个.
现在我在VB中做同样的事情
Private Shared _instance As StackTracker
Private Shared ReadOnly _lock As Object = New Object()
Private Sub New()
_WorkingStack = New Stack(Of MethodObject)
_HistoryStack = New Queue(Of MethodObject)
End Sub
Public Shared ReadOnly Property Instance() As StackTracker
Get
SyncLock _lock
If (_instance Is Nothing) Then
_instance = New StackTracker()
End If
End SyncLock
Return _instance
End Get
End Property
我得到StackTracker.Instance.Instance,它一直在继续,而不是世界的尽头,它看起来不错.
以下是完整的代码：
原文链接：https://www.f2er.com/vb/255110.htmlPublic NotInheritable Class MySingleton
Private Shared ReadOnly _instance As New Lazy(Of MySingleton)(Function() New
MySingleton(),System.Threading.LazyThreadSafetyMode.ExecutionAndPublication)
Private Sub New()
End Sub
Public Shared ReadOnly Property Instance() As MySingleton
Get
Return _instance.Value
End Get
End Property
End Class
然后使用这个类,使用以下方式获取实例：
Dim theSingleton As MySingleton = MySingleton.Instance