ThreadStateException Class
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ Public Class ThreadStateException Inherits SystemException 'Usage Dim instance As ThreadStateException
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ public class ThreadStateException extends SystemException
SerializableAttribute ComVisibleAttribute(true) public class ThreadStateException extends SystemException
Once a thread is created, it is in at least one of the ThreadState states until it terminates. ThreadStateException is thrown by methods that cannot perform the requested operation due to the current state of a thread. For example, trying to restart an aborted thread by calling Start on a thread that has terminated throws a ThreadStateException.
ThreadStateException uses the HRESULT COR_E_THREADSTATE, which has the value 0x80131520.
For a list of initial property values for an instance of ThreadStateException, see the ThreadStateException constructors.
The following example demonstrates an error that causes the system to throw a ThreadStateException.
Imports System Imports System.Threading Public Class ThreadWork Public Shared Sub DoWork() Console.WriteLine("Working thread...") End Sub 'DoWork End Class 'ThreadWork Class ThreadStateTest Public Shared Sub Main() Dim myThreadDelegate As New ThreadStart(AddressOf ThreadWork.DoWork) Dim myThread As New Thread(myThreadDelegate) myThread.Start() Thread.Sleep(0) Console.WriteLine("In main. Attempting to restart myThread.") Try myThread.Start() Catch e As ThreadStateException Console.WriteLine("Caught: {0}", e.Message) End Try End Sub 'Main End Class 'ThreadStateTest
import System.*;
import System.Threading.*;
public class ThreadWork
{
public static void DoWork()
{
Console.WriteLine("Working thread...");
} //DoWork
} //ThreadWork
class ThreadStateTest
{
public static void main(String[] args)
{
ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);
System.Threading.Thread myThread =
new System.Threading.Thread(myThreadDelegate);
myThread.Start();
System.Threading.Thread.Sleep(0);
Console.WriteLine("In main. Attempting to restart myThread.");
try {
myThread.Start();
}
catch (ThreadStateException e) {
Console.WriteLine("Caught: {0}", e.get_Message());
}
} //main
} //ThreadStateTest
This code produces the following output:
In main. Attempting to restart myThread.
Working thread...
Caught: Thread is running or terminated. Cannot restart.
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.