Thread.ThreadState Property
Gets a value containing the states of the current thread.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public ReadOnly Property ThreadState As ThreadState 'Usage Dim instance As Thread Dim value As ThreadState value = instance.ThreadState
Property Value
Type: System.Threading.ThreadStateOne of the ThreadState values indicating the state of the current thread. The initial value is Unstarted.
The ThreadState property provides more specific information than the IsAlive property.
Important Note: |
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Thread state is only of interest in debugging scenarios. Your code should never use thread state to synchronize the activities of threads. |
The following code example demonstrates accessing the ThreadState of a thread.
Imports Microsoft.VisualBasic Imports System Imports System.Threading Public Class ApartmentTest <MTAThread> _ Shared Sub Main() Dim newThread As Thread = New Thread(AddressOf ThreadMethod) newThread.SetApartmentState(ApartmentState.MTA) ' The following line is ignored since ' ApartmentState can only be set once. newThread.SetApartmentState(ApartmentState.STA) Console.WriteLine("ThreadState: {0}, ApartmentState: {1}", _ newThread.ThreadState, newThread.GetApartmentState()) newThread.Start() ' Wait for newThread to start and go to sleep. Thread.Sleep(300) Try ' This causes an exception since newThread is sleeping. newThread.SetApartmentState(ApartmentState.STA) Catch stateException As ThreadStateException Console.WriteLine(vbCrLf & "{0} caught:" & vbCrLf & _ "Thread is not In the Unstarted or Running state.", _ stateException.GetType().Name) Console.WriteLine("ThreadState: {0}, ApartmentState: " & _ "{1}", newThread.ThreadState, newThread.GetApartmentState()) End Try End Sub Shared Sub ThreadMethod() Thread.Sleep(1000) End Sub End Class
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Important Note: