Thread.ThreadState プロパティ

現在のスレッドの状態を示す値を取得します。

Public ReadOnly Property ThreadState As ThreadState
[C#]
public ThreadState ThreadState {get;}
[C++]
public: __property ThreadState get_ThreadState();
[JScript]
public function get ThreadState() : ThreadState;

プロパティ値

現在のスレッドの状態を示す ThreadState 値の 1 つ。初期値は Unstarted です。

解説

ThreadState プロパティは、 IsAlive プロパティよりも詳細な情報を提供します。

使用例

[Visual Basic, C#, C++] スレッドの ThreadState にアクセスする例を次に示します。

 
Imports Microsoft.VisualBasic
Imports System
Imports System.Threading

Public Class ApartmentTest

    Shared Sub Main()
    
        Dim newThread As Thread = New Thread(AddressOf ThreadMethod)
        newThread.ApartmentState = ApartmentState.MTA

        ' The following line is ignored since 
        ' ApartmentState can only be set once.
        newThread.ApartmentState = ApartmentState.STA

        Console.WriteLine("ThreadState: {0}, ApartmentState: {1}", _
            newThread.ThreadState, newThread.ApartmentState)

        newThread.Start()

        ' Wait for newThread to start and go to sleep.
        Thread.Sleep(300)
        Try
            ' This causes an exception since newThread is sleeping.
            newThread.ApartmentState = 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.ApartmentState)
        End Try

    End Sub

    Shared Sub ThreadMethod()
        Thread.Sleep(1000)
    End Sub

End Class

[C#] 
using System;
using System.Threading;

class ApartmentTest
{
    static void Main()
    {
        Thread newThread = 
            new Thread(new ThreadStart(ThreadMethod));
        newThread.ApartmentState = ApartmentState.MTA;

        // The following line is ignored since 
        // ApartmentState can only be set once.
        newThread.ApartmentState = ApartmentState.STA;

        Console.WriteLine("ThreadState: {0}, ApartmentState: {1}", 
            newThread.ThreadState, newThread.ApartmentState);

        newThread.Start();

        // Wait for newThread to start and go to sleep.
        Thread.Sleep(300);
        try
        {
            // This causes an exception since newThread is sleeping.
            newThread.ApartmentState = ApartmentState.STA;
        }
        catch(ThreadStateException stateException)
        {
            Console.WriteLine("\n{0} caught:\n" +
                "Thread is not in the Unstarted or Running state.", 
                stateException.GetType().Name);
            Console.WriteLine("ThreadState: {0}, ApartmentState: {1}",
                newThread.ThreadState, newThread.ApartmentState);
        }
    }

    static void ThreadMethod()
    {
        Thread.Sleep(1000);
    }
}

[C++] 
#using <mscorlib.dll>
using namespace System;
using namespace System::Threading;

__gc class ApartmentTest
{
public :
    static void ThreadMethod()
    {
        Thread::Sleep(1000);
    }
};

void main()
{
    Thread* newThread = 
        new Thread(new ThreadStart(0, &ApartmentTest::ThreadMethod));
        newThread->ApartmentState = ApartmentState::MTA;

        // The following line is ignored since 
        // ApartmentState can only be set once.
        newThread->ApartmentState = ApartmentState::STA;

        Console::WriteLine(S"ThreadState: {0}, ApartmentState: {1}", 
            __box(newThread->ThreadState)->ToString(),
            __box(newThread->ApartmentState)->ToString());

    newThread->Start();

    // Wait for newThread to start and go to sleep.
    Thread::Sleep(300);
    try
    {
        // This causes an exception since newThread is sleeping.
        newThread->ApartmentState = ApartmentState::STA;
    }
    catch(ThreadStateException* stateException)
    {
        Console::WriteLine(S"\n{0} caught:\n"
            S"Thread is not in the Unstarted or Running state.",
            stateException->GetType()->Name);
        Console::WriteLine(S"ThreadState: {0}, ApartmentState: {1}", 
            __box(newThread->ThreadState)->ToString(),
            __box(newThread->ApartmentState)->ToString());
    }
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

Thread クラス | Thread メンバ | System.Threading 名前空間 | スレッド状態