ApartmentState 枚举

定义

命名空间:

System.Threading

程序集:

netstandard.dll, System.Threading.Thread.dll

Source:

ApartmentState.cs

指定 Thread的公寓状态。

public enum class ApartmentState

public enum ApartmentState

type ApartmentState = 

Public Enum ApartmentState

继承

Object

ValueType

Enum

ApartmentState

字段

名称	值	说明
STA	0	将 Thread 创建并输入单线程单元。
MTA	1	将 Thread 创建并输入多线程单元。
Unknown	2	尚未设置该 ApartmentState 属性。

示例

下面的代码示例演示如何设置线程的公寓状态。

using namespace System;
using namespace System::Threading;
ref class ApartmentTest
{
public:
   static void ThreadMethod()
   {
      Thread::Sleep( 1000 );
   }

};

int main()
{
   Thread^ newThread = gcnew Thread( gcnew ThreadStart( &ApartmentTest::ThreadMethod ) );
   newThread->SetApartmentState(ApartmentState::MTA);
   
   Console::WriteLine( "ThreadState: {0}, ApartmentState: {1}", newThread->ThreadState.ToString(), newThread->GetApartmentState().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->SetApartmentState(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.ToString(), newThread->GetApartmentState().ToString() );
   }

}

using System;
using System.Threading;

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

        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(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.GetApartmentState());
        }
    }

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

Imports System.Threading

Public Class ApartmentTest

    <MTAThread> _
    Shared Sub Main()
    
        Dim newThread As Thread = New Thread(AddressOf ThreadMethod)
        newThread.SetApartmentState(ApartmentState.MTA)

        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

注解

单元是共享相同线程访问要求的对象进程中的逻辑容器。 同一单元中的所有对象都可以从单元中的任何线程接收呼叫。 .NET Framework 不使用单元，托管对象负责以线程安全的方式使用所有共享资源。

由于 COM 类使用单元，因此公共语言运行时需要在 COM 互操作情况下调用 COM 对象时创建和初始化单元。 托管线程可以创建并输入只允许一个线程的单线程单元（STA），或包含一个或多个线程的多线程单元（MTA）。 可以通过将线程的属性设置为 ApartmentState 枚举的值 ApartmentState 之一来控制所创建单元的类型。 由于给定线程只能初始化 COM 单元一次，因此不能在首次调用非托管代码后更改单元类型。

有关详细信息，请参阅 Thread托管 和非托管线程处理以及 高级 COM 互操作性。

另请参阅

• Thread