WaitHandle.WaitAny WaitHandle.WaitAny WaitHandle.WaitAny WaitHandle.WaitAny Method

定義

等候指定陣列中有任何項目收到信號。Waits for any of the elements in the specified array to receive a signal.

多載

WaitAny(WaitHandle[]) WaitAny(WaitHandle[]) WaitAny(WaitHandle[]) WaitAny(WaitHandle[])

等候指定陣列中有任何項目收到信號。Waits for any of the elements in the specified array to receive a signal.

WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32)

等候指定之陣列中有任何項目收到信號,使用 32 位元帶正負號的整數以指定時間間隔。Waits for any of the elements in the specified array to receive a signal, using a 32-bit signed integer to specify the time interval.

WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan)

等候指定陣列中的所有項目都收到信號,使用 TimeSpan 來指定時間間隔。Waits for any of the elements in the specified array to receive a signal, using a TimeSpan to specify the time interval.

WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean)

等候指定陣列中有任何項目收到信號;使用 32 位元帶正負號的整數 (Signed Integer) 來指定時間間隔,並指定是否在等候之前先離開同步處理領域。Waits for any of the elements in the specified array to receive a signal, using a 32-bit signed integer to specify the time interval, and specifying whether to exit the synchronization domain before the wait.

WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean)

等候指定陣列中的所有項目都收到信號,使用 TimeSpan 來指定時間間隔,並指定是否要先離開同步處理網域,再開始等候。Waits for any of the elements in the specified array to receive a signal, using a TimeSpan to specify the time interval and specifying whether to exit the synchronization domain before the wait.

WaitAny(WaitHandle[]) WaitAny(WaitHandle[]) WaitAny(WaitHandle[]) WaitAny(WaitHandle[])

等候指定陣列中有任何項目收到信號。Waits for any of the elements in the specified array to receive a signal.

public:
 static int WaitAny(cli::array <System::Threading::WaitHandle ^> ^ waitHandles);
public static int WaitAny (System.Threading.WaitHandle[] waitHandles);
static member WaitAny : System.Threading.WaitHandle[] -> int
Public Shared Function WaitAny (waitHandles As WaitHandle()) As Integer

參數

waitHandles
WaitHandle[]

WaitHandle 陣列,包含目前執行個體將等候的物件。A WaitHandle array containing the objects for which the current instance will wait.

傳回

滿足等候條件之物件的陣列索引。The array index of the object that satisfied the wait.

例外狀況

waitHandles 參數為 nullThe waitHandles parameter is null.

-或--or- waitHandles 陣列中的一或多個物件為 nullOne or more of the objects in the waitHandles array is null.

waitHandles 中的物件數目超過系統允許的數目。The number of objects in waitHandles is greater than the system permits.

waitHandles 是不具有項目的陣列,且 .NET Framework 版本為 1.0 或 1.1。waitHandles is an array with no elements, and the .NET Framework version is 1.0 or 1.1.

由於執行緒結束時未釋放 Mutex,已完成等候。The wait completed because a thread exited without releasing a mutex. 在 Windows 98 或 Windows Millennium Edition 上不擲回這個例外狀況。This exception is not thrown on Windows 98 or Windows Millennium Edition.

waitHandles 是不具有元素的陣列,且 .NET Framework 版本為 2.0 (含) 以後版本。waitHandles is an array with no elements, and the .NET Framework version is 2.0 or later.

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。The waitHandles array contains a transparent proxy for a WaitHandle in another application domain.

範例

下列程式碼範例示範如何呼叫WaitAny方法。The following code example demonstrates calling the WaitAny method.

using namespace System;
using namespace System::Threading;

public ref class WaitHandleExample
{
    // Define a random number generator for testing.
private:
    static Random^ random = gcnew Random();
public:
    static void DoTask(Object^ state)
    {
        AutoResetEvent^ autoReset = (AutoResetEvent^) state;
        int time = 1000 * random->Next(2, 10);
        Console::WriteLine("Performing a task for {0} milliseconds.", time);
        Thread::Sleep(time);
        autoReset->Set();
    }
};

int main()
{
    // Define an array with two AutoResetEvent WaitHandles.
    array<WaitHandle^>^ handles = gcnew array<WaitHandle^> {
        gcnew AutoResetEvent(false), gcnew AutoResetEvent(false)};

    // Queue up two tasks on two different threads;
    // wait until all tasks are completed.
    DateTime timeInstance = DateTime::Now;
    Console::WriteLine("Main thread is waiting for BOTH tasks to " +
        "complete.");
    ThreadPool::QueueUserWorkItem(
        gcnew WaitCallback(WaitHandleExample::DoTask), handles[0]);
    ThreadPool::QueueUserWorkItem(
        gcnew WaitCallback(WaitHandleExample::DoTask), handles[1]);
    WaitHandle::WaitAll(handles);
    // The time shown below should match the longest task.
    Console::WriteLine("Both tasks are completed (time waited={0})",
        (DateTime::Now - timeInstance).TotalMilliseconds);

    // Queue up two tasks on two different threads;
    // wait until any tasks are completed.
    timeInstance = DateTime::Now;
    Console::WriteLine();
    Console::WriteLine("The main thread is waiting for either task to " +
        "complete.");
    ThreadPool::QueueUserWorkItem(
        gcnew WaitCallback(WaitHandleExample::DoTask), handles[0]);
    ThreadPool::QueueUserWorkItem(
        gcnew WaitCallback(WaitHandleExample::DoTask), handles[1]);
    int index = WaitHandle::WaitAny(handles);
    // The time shown below should match the shortest task.
    Console::WriteLine("Task {0} finished first (time waited={1}).",
        index + 1, (DateTime::Now - timeInstance).TotalMilliseconds);
}

// This code produces the following sample output.
//
// Main thread is waiting for BOTH tasks to complete.
// Performing a task for 7000 milliseconds.
// Performing a task for 4000 milliseconds.
// Both tasks are completed (time waited=7064.8052)

// The main thread is waiting for either task to complete.
// Performing a task for 2000 milliseconds.
// Performing a task for 2000 milliseconds.
// Task 1 finished first (time waited=2000.6528).
using System;
using System.Threading;

public sealed class App 
{
    // Define an array with two AutoResetEvent WaitHandles.
    static WaitHandle[] waitHandles = new WaitHandle[] 
    {
        new AutoResetEvent(false),
        new AutoResetEvent(false)
    };

    // Define a random number generator for testing.
    static Random r = new Random();

    static void Main() 
    {
        // Queue up two tasks on two different threads; 
        // wait until all tasks are completed.
        DateTime dt = DateTime.Now;
        Console.WriteLine("Main thread is waiting for BOTH tasks to complete.");
        ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[0]);
        ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[1]);
        WaitHandle.WaitAll(waitHandles);
        // The time shown below should match the longest task.
        Console.WriteLine("Both tasks are completed (time waited={0})", 
            (DateTime.Now - dt).TotalMilliseconds);

        // Queue up two tasks on two different threads; 
        // wait until any tasks are completed.
        dt = DateTime.Now;
        Console.WriteLine();
        Console.WriteLine("The main thread is waiting for either task to complete.");
        ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[0]);
        ThreadPool.QueueUserWorkItem(new WaitCallback(DoTask), waitHandles[1]);
        int index = WaitHandle.WaitAny(waitHandles);
        // The time shown below should match the shortest task.
        Console.WriteLine("Task {0} finished first (time waited={1}).",
            index + 1, (DateTime.Now - dt).TotalMilliseconds);
    }

    static void DoTask(Object state) 
    {
        AutoResetEvent are = (AutoResetEvent) state;
        int time = 1000 * r.Next(2, 10);
        Console.WriteLine("Performing a task for {0} milliseconds.", time);
        Thread.Sleep(time);
        are.Set();
    }
}

// This code produces output similar to the following:
//
//  Main thread is waiting for BOTH tasks to complete.
//  Performing a task for 7000 milliseconds.
//  Performing a task for 4000 milliseconds.
//  Both tasks are completed (time waited=7064.8052)
// 
//  The main thread is waiting for either task to complete.
//  Performing a task for 2000 milliseconds.
//  Performing a task for 2000 milliseconds.
//  Task 1 finished first (time waited=2000.6528).
Imports System
Imports System.Threading

NotInheritable Public Class App
    ' Define an array with two AutoResetEvent WaitHandles.
    Private Shared waitHandles() As WaitHandle = _
        {New AutoResetEvent(False), New AutoResetEvent(False)}
    
    ' Define a random number generator for testing.
    Private Shared r As New Random()
    
    <MTAThreadAttribute> _
    Public Shared Sub Main() 
        ' Queue two tasks on two different threads; 
        ' wait until all tasks are completed.
        Dim dt As DateTime = DateTime.Now
        Console.WriteLine("Main thread is waiting for BOTH tasks to complete.")
        ThreadPool.QueueUserWorkItem(AddressOf DoTask, waitHandles(0))
        ThreadPool.QueueUserWorkItem(AddressOf DoTask, waitHandles(1))
        WaitHandle.WaitAll(waitHandles)
        ' The time shown below should match the longest task.
        Console.WriteLine("Both tasks are completed (time waited={0})", _
            (DateTime.Now - dt).TotalMilliseconds)
        
        ' Queue up two tasks on two different threads; 
        ' wait until any tasks are completed.
        dt = DateTime.Now
        Console.WriteLine()
        Console.WriteLine("The main thread is waiting for either task to complete.")
        ThreadPool.QueueUserWorkItem(AddressOf DoTask, waitHandles(0))
        ThreadPool.QueueUserWorkItem(AddressOf DoTask, waitHandles(1))
        Dim index As Integer = WaitHandle.WaitAny(waitHandles)
        ' The time shown below should match the shortest task.
        Console.WriteLine("Task {0} finished first (time waited={1}).", _
            index + 1,(DateTime.Now - dt).TotalMilliseconds)
    
    End Sub 'Main
    
    Shared Sub DoTask(ByVal state As [Object]) 
        Dim are As AutoResetEvent = CType(state, AutoResetEvent)
        Dim time As Integer = 1000 * r.Next(2, 10)
        Console.WriteLine("Performing a task for {0} milliseconds.", time)
        Thread.Sleep(time)
        are.Set()
    
    End Sub 'DoTask
End Class 'App

' This code produces output similar to the following:
'
'  Main thread is waiting for BOTH tasks to complete.
'  Performing a task for 7000 milliseconds.
'  Performing a task for 4000 milliseconds.
'  Both tasks are completed (time waited=7064.8052)
' 
'  The main thread is waiting for either task to complete.
'  Performing a task for 2000 milliseconds.
'  Performing a task for 2000 milliseconds.
'  Task 1 finished first (time waited=2000.6528).

備註

AbandonedMutexException 是.NET Framework 2.0 版中的新功能。AbandonedMutexException is new in the .NET Framework version 2.0. 在舊版中,WaitAny方法會傳回true如果等候完成,因為已放棄 mutex。In previous versions, the WaitAny method returns true if the wait completes because a mutex is abandoned. 已放棄的 mutex 通常表示嚴重的程式碼錯誤。An abandoned mutex often indicates a serious coding error. 如果是全系統 mutex,則可能表示,應用程式已意外終止 (例如,透過使用 Windows 工作管理員)。In the case of a system-wide mutex, it might indicate that an application has been terminated abruptly (for example, by using Windows Task Manager). 例外狀況包含資訊適用於偵錯。The exception contains information useful for debugging.

WaitAny方法會擲回AbandonedMutexException只等待完成時因為遭到放棄的 mutex。The WaitAny method throws an AbandonedMutexException only when the wait completes because of an abandoned mutex. 如果waitHandles包含具有較低的索引編號,已放棄的 mutex,比釋放的 mutexWaitAny方法正常完成,並不會擲回例外狀況。If waitHandles contains a released mutex with a lower index number than the abandoned mutex, the WaitAny method completes normally and the exception is not thrown.

注意

在版本早於 2.0 版中,如果執行緒結束或中止而不需要明確地釋放的.NET framework Mutex,且Mutex位於索引 0 (零),在WaitAny陣列在另一個執行緒,所傳回的索引上WaitAny是128 而不是 0。In versions of the .NET Framework earlier than version 2.0, if a thread exits or aborts without explicitly releasing a Mutex, and that Mutex is at index 0 (zero) in a WaitAny array on another thread, the index returned by WaitAny is 128 instead of 0.

這個方法會傳回任何控制代碼會收到信號。This method returns when any handle is signaled. 如果在呼叫期間,多個物件會變成收到訊號,則傳回的值會是物件的已收到訊號具有已收到訊號的所有物件的最小的索引值的陣列索引。If more than one object becomes signaled during the call, the return value is the array index of the signaled object with the smallest index value of all the signaled objects. 在某些實作中,如果有多個傳遞 64 的控制代碼,NotSupportedException就會擲回。On some implementations, if more that 64 handles are passed, a NotSupportedException is thrown.

呼叫這個方法多載就相當於呼叫WaitAny(WaitHandle[], Int32, Boolean)方法多載,並指定-1 (或Timeout.Infinite) 的millisecondsTimeouttrueexitContextCalling this method overload is equivalent to calling the WaitAny(WaitHandle[], Int32, Boolean) method overload and specifying -1 (or Timeout.Infinite) for millisecondsTimeout and true for exitContext.

WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32) WaitAny(WaitHandle[], Int32)

等候指定之陣列中有任何項目收到信號,使用 32 位元帶正負號的整數以指定時間間隔。Waits for any of the elements in the specified array to receive a signal, using a 32-bit signed integer to specify the time interval.

public:
 static int WaitAny(cli::array <System::Threading::WaitHandle ^> ^ waitHandles, int millisecondsTimeout);
public static int WaitAny (System.Threading.WaitHandle[] waitHandles, int millisecondsTimeout);
static member WaitAny : System.Threading.WaitHandle[] * int -> int
Public Shared Function WaitAny (waitHandles As WaitHandle(), millisecondsTimeout As Integer) As Integer

參數

waitHandles
WaitHandle[]

WaitHandle 陣列,包含目前執行個體將等候的物件。A WaitHandle array containing the objects for which the current instance will wait.

millisecondsTimeout
Int32 Int32 Int32 Int32

要等候的毫秒數,如果要無限期等候,則為 Infinite (-1)。The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.

傳回

滿足等候條件之物件的陣列索引;如果沒有物件滿足等候條件,而且已經過相當於 millisecondsTimeout 的時間間隔,則為 WaitTimeoutThe array index of the object that satisfied the wait, or WaitTimeout if no object satisfied the wait and a time interval equivalent to millisecondsTimeout has passed.

例外狀況

waitHandles 參數為 nullThe waitHandles parameter is null.

-或--or- waitHandles 陣列中的一或多個物件為 nullOne or more of the objects in the waitHandles array is null.

waitHandles 中的物件數目超過系統允許的數目。The number of objects in waitHandles is greater than the system permits.

millisecondsTimeout 為 -1 以外的負數,表示無限逾時。millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.

由於執行緒結束時未釋放 Mutex,已完成等候。The wait completed because a thread exited without releasing a mutex. 在 Windows 98 或 Windows Millennium Edition 上不擲回這個例外狀況。This exception is not thrown on Windows 98 or Windows Millennium Edition.

waitHandles 是不含任何項目的陣列。waitHandles is an array with no elements.

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。The waitHandles array contains a transparent proxy for a WaitHandle in another application domain.

備註

如果millisecondsTimeout為零,此方法不會封鎖。If millisecondsTimeout is zero, the method does not block. 它會測試等候控制代碼的狀態,並立即傳回。It tests the state of the wait handles and returns immediately.

WaitAny方法會擲回AbandonedMutexException只等待完成時因為遭到放棄的 mutex。The WaitAny method throws an AbandonedMutexException only when the wait completes because of an abandoned mutex. 如果waitHandles包含具有較低的索引編號,已放棄的 mutex,比釋放的 mutexWaitAny方法正常完成,並不會擲回例外狀況。If waitHandles contains a released mutex with a lower index number than the abandoned mutex, the WaitAny method completes normally and the exception is not thrown.

這個方法傳回時則等候會終止,任何控制代碼會收到信號或發生逾時。This method returns when the wait terminates, either when any of the handles are signaled or when a timeout occurs. 如果在呼叫期間,多個物件會變成收到訊號,則傳回的值會是物件的已收到訊號具有已收到訊號的所有物件的最小的索引值的陣列索引。If more than one object becomes signaled during the call, the return value is the array index of the signaled object with the smallest index value of all the signaled objects. 在某些實作中,如果有多個傳遞 64 的控制代碼,NotSupportedException就會擲回。On some implementations, if more that 64 handles are passed, a NotSupportedException is thrown.

呼叫這個方法多載等同於呼叫WaitAny(WaitHandle[], Int32, Boolean)多載,並指定falseexitContextCalling this method overload is the same as calling the WaitAny(WaitHandle[], Int32, Boolean) overload and specifying false for exitContext.

WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan) WaitAny(WaitHandle[], TimeSpan)

等候指定陣列中的所有項目都收到信號,使用 TimeSpan 來指定時間間隔。Waits for any of the elements in the specified array to receive a signal, using a TimeSpan to specify the time interval.

public:
 static int WaitAny(cli::array <System::Threading::WaitHandle ^> ^ waitHandles, TimeSpan timeout);
public static int WaitAny (System.Threading.WaitHandle[] waitHandles, TimeSpan timeout);
static member WaitAny : System.Threading.WaitHandle[] * TimeSpan -> int
Public Shared Function WaitAny (waitHandles As WaitHandle(), timeout As TimeSpan) As Integer

參數

waitHandles
WaitHandle[]

WaitHandle 陣列,包含目前執行個體將等候的物件。A WaitHandle array containing the objects for which the current instance will wait.

timeout
TimeSpan TimeSpan TimeSpan TimeSpan

TimeSpan,代表等候毫秒數;或是 TimeSpan,代表無限期等候的 -1 毫秒。A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

傳回

滿足等候條件之物件的陣列索引;如果沒有物件滿足等候條件,而且已經過相當於 timeout 的時間間隔,則為 WaitTimeoutThe array index of the object that satisfied the wait, or WaitTimeout if no object satisfied the wait and a time interval equivalent to timeout has passed.

例外狀況

waitHandles 參數為 nullThe waitHandles parameter is null.

-或--or- waitHandles 陣列中的一或多個物件為 nullOne or more of the objects in the waitHandles array is null.

waitHandles 中的物件數目超過系統允許的數目。The number of objects in waitHandles is greater than the system permits.

timeout 為 -1 毫秒以外的負數,表示無限逾時。timeout is a negative number other than -1 milliseconds, which represents an infinite time-out. -或--or- timeout 大於 MaxValuetimeout is greater than MaxValue.

由於執行緒結束時未釋放 Mutex,已完成等候。The wait completed because a thread exited without releasing a mutex. 在 Windows 98 或 Windows Millennium Edition 上不擲回這個例外狀況。This exception is not thrown on Windows 98 or Windows Millennium Edition.

waitHandles 是不含任何項目的陣列。waitHandles is an array with no elements.

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。The waitHandles array contains a transparent proxy for a WaitHandle in another application domain.

備註

如果timeout為零,此方法不會封鎖。If timeout is zero, the method does not block. 它會測試等候控制代碼的狀態,並立即傳回。It tests the state of the wait handles and returns immediately.

WaitAny方法會擲回AbandonedMutexException只等待完成時因為遭到放棄的 mutex。The WaitAny method throws an AbandonedMutexException only when the wait completes because of an abandoned mutex. 如果waitHandles包含具有較低的索引編號,已放棄的 mutex,比釋放的 mutexWaitAny方法正常完成,並不會擲回例外狀況。If waitHandles contains a released mutex with a lower index number than the abandoned mutex, the WaitAny method completes normally and the exception is not thrown.

這個方法傳回時則等候會終止,任何控制代碼會收到信號或逾時發生時。This method returns when the wait terminates, either when any of the handles are signaled or when a time-out occurs. 如果在呼叫期間,多個物件會變成收到訊號,則傳回的值會是物件的已收到訊號具有已收到訊號的所有物件的最小的索引值的陣列索引。If more than one object becomes signaled during the call, the return value is the array index of the signaled object with the smallest index value of all the signaled objects. 在某些實作中,如果有多個傳遞 64 的控制代碼,NotSupportedException就會擲回。On some implementations, if more that 64 handles are passed, a NotSupportedException is thrown.

最大值timeoutInt32.MaxValueThe maximum value for timeout is Int32.MaxValue.

呼叫這個方法多載等同於呼叫WaitAny(WaitHandle[], TimeSpan, Boolean)多載,並指定falseexitContextCalling this method overload is the same as calling the WaitAny(WaitHandle[], TimeSpan, Boolean) overload and specifying false for exitContext.

WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean) WaitAny(WaitHandle[], Int32, Boolean)

等候指定陣列中有任何項目收到信號;使用 32 位元帶正負號的整數 (Signed Integer) 來指定時間間隔,並指定是否在等候之前先離開同步處理領域。Waits for any of the elements in the specified array to receive a signal, using a 32-bit signed integer to specify the time interval, and specifying whether to exit the synchronization domain before the wait.

public:
 static int WaitAny(cli::array <System::Threading::WaitHandle ^> ^ waitHandles, int millisecondsTimeout, bool exitContext);
public static int WaitAny (System.Threading.WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext);
static member WaitAny : System.Threading.WaitHandle[] * int * bool -> int
Public Shared Function WaitAny (waitHandles As WaitHandle(), millisecondsTimeout As Integer, exitContext As Boolean) As Integer

參數

waitHandles
WaitHandle[]

WaitHandle 陣列,包含目前執行個體將等候的物件。A WaitHandle array containing the objects for which the current instance will wait.

millisecondsTimeout
Int32 Int32 Int32 Int32

要等候的毫秒數,如果要無限期等候,則為 Infinite (-1)。The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.

exitContext
Boolean Boolean Boolean Boolean

true 表示在等候 (如果在同步內容中) 前結束內容的同步處理網域,並於之後重新取得,否則為 falsetrue to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it afterward; otherwise, false.

傳回

滿足等候條件之物件的陣列索引;如果沒有物件滿足等候條件,而且已經過相當於 millisecondsTimeout 的時間間隔,則為 WaitTimeoutThe array index of the object that satisfied the wait, or WaitTimeout if no object satisfied the wait and a time interval equivalent to millisecondsTimeout has passed.

例外狀況

waitHandles 參數為 nullThe waitHandles parameter is null.

-或--or- waitHandles 陣列中的一或多個物件為 nullOne or more of the objects in the waitHandles array is null.

waitHandles 中的物件數目超過系統允許的數目。The number of objects in waitHandles is greater than the system permits.

waitHandles 是不具有項目的陣列,且 .NET Framework 版本為 1.0 或 1.1。waitHandles is an array with no elements, and the .NET Framework version is 1.0 or 1.1.

millisecondsTimeout 為 -1 以外的負數,表示無限逾時。millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.

由於執行緒結束時未釋放 Mutex,已完成等候。The wait completed because a thread exited without releasing a mutex. 在 Windows 98 或 Windows Millennium Edition 上不擲回這個例外狀況。This exception is not thrown on Windows 98 or Windows Millennium Edition.

waitHandles 是不具有元素的陣列,且 .NET Framework 版本為 2.0 (含) 以後版本。waitHandles is an array with no elements, and the .NET Framework version is 2.0 or later.

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。The waitHandles array contains a transparent proxy for a WaitHandle in another application domain.

範例

下列程式碼範例示範如何使用執行緒集區同時搜尋多個磁碟上的檔案。The following code example demonstrates how to use the thread pool to simultaneously search for a file on multiple disks. 如需空間考量,會搜尋只有每個磁碟的根目錄。For space considerations, only the root directory of each disk is searched.

using namespace System;
using namespace System::IO;
using namespace System::Threading;
ref class Search
{
private:

   // Maintain state information to pass to FindCallback.
   ref class State
   {
   public:
      AutoResetEvent^ autoEvent;
      String^ fileName;
      State( AutoResetEvent^ autoEvent, String^ fileName )
         : autoEvent( autoEvent ), fileName( fileName )
      {}

   };


public:
   array<AutoResetEvent^>^autoEvents;
   array<String^>^diskLetters;

   // Search for stateInfo->fileName.
   void FindCallback( Object^ state )
   {
      State^ stateInfo = dynamic_cast<State^>(state);
      
      // Signal if the file is found.
      if ( File::Exists( stateInfo->fileName ) )
      {
         stateInfo->autoEvent->Set();
      }
   }

   Search()
   {
      
      // Retrieve an array of disk letters.
      diskLetters = Environment::GetLogicalDrives();
      autoEvents = gcnew array<AutoResetEvent^>(diskLetters->Length);
      for ( int i = 0; i < diskLetters->Length; i++ )
      {
         autoEvents[ i ] = gcnew AutoResetEvent( false );

      }
   }


   // Search for fileName in the root directory of all disks.
   void FindFile( String^ fileName )
   {
      for ( int i = 0; i < diskLetters->Length; i++ )
      {
         Console::WriteLine(  "Searching for {0} on {1}.", fileName, diskLetters[ i ] );
         ThreadPool::QueueUserWorkItem( gcnew WaitCallback( this, &Search::FindCallback ), gcnew State( autoEvents[ i ],String::Concat( diskLetters[ i ], fileName ) ) );

      }
      
      // Wait for the first instance of the file to be found.
      int index = WaitHandle::WaitAny( autoEvents, 3000, false );
      if ( index == WaitHandle::WaitTimeout )
      {
         Console::WriteLine( "\n{0} not found.", fileName );
      }
      else
      {
         Console::WriteLine( "\n{0} found on {1}.", fileName, diskLetters[ index ] );
      }
   }

};

int main()
{
   Search^ search = gcnew Search;
   search->FindFile( "SomeFile.dat" );
}

using System;
using System.IO;
using System.Threading;

class Test
{
    static void Main()
    {
        Search search = new Search();
        search.FindFile("SomeFile.dat");
    }
}

class Search
{
    // Maintain state information to pass to FindCallback.
    class State
    {
        public AutoResetEvent autoEvent;
        public string         fileName;

        public State(AutoResetEvent autoEvent, string fileName)
        {
            this.autoEvent    = autoEvent;
            this.fileName     = fileName;
        }
    }

    AutoResetEvent[] autoEvents;
    String[] diskLetters;

    public Search()
    {
        // Retrieve an array of disk letters.
        diskLetters = Environment.GetLogicalDrives();

        autoEvents = new AutoResetEvent[diskLetters.Length];
        for(int i = 0; i < diskLetters.Length; i++)
        {
            autoEvents[i] = new AutoResetEvent(false);
        }
    }

    // Search for fileName in the root directory of all disks.
    public void FindFile(string fileName)
    {
        for(int i = 0; i < diskLetters.Length; i++)
        {
            Console.WriteLine("Searching for {0} on {1}.",
                fileName, diskLetters[i]);
            ThreadPool.QueueUserWorkItem(
                new WaitCallback(FindCallback), 
                new State(autoEvents[i], diskLetters[i] + fileName));
        }

        // Wait for the first instance of the file to be found.
        int index = WaitHandle.WaitAny(autoEvents, 3000, false);
        if(index == WaitHandle.WaitTimeout)
        {
            Console.WriteLine("\n{0} not found.", fileName);
        }
        else
        {
            Console.WriteLine("\n{0} found on {1}.", fileName,
                diskLetters[index]);
        }
    }

    // Search for stateInfo.fileName.
    void FindCallback(object state)
    {
        State stateInfo = (State)state;

        // Signal if the file is found.
        if(File.Exists(stateInfo.fileName))
        {
            stateInfo.autoEvent.Set();
        }
    }
}
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Threading

Public Class Test

    <MTAThread> _
    Shared Sub Main()
        Dim search As New Search()
        search.FindFile("SomeFile.dat")
    End Sub    
End Class

Public Class Search

    ' Maintain state information to pass to FindCallback.
    Class State
        Public autoEvent As AutoResetEvent 
        Public fileName As String         

        Sub New(anEvent As AutoResetEvent, fName As String)
            autoEvent = anEvent
            fileName = fName
        End Sub
    End Class

    Dim autoEvents() As AutoResetEvent
    Dim diskLetters() As String

    Sub New()

        ' Retrieve an array of disk letters.
        diskLetters = Environment.GetLogicalDrives()

        autoEvents = New AutoResetEvent(diskLetters.Length - 1) {}
        For i As Integer = 0 To diskLetters.Length - 1
            autoEvents(i) = New AutoResetEvent(False)
        Next i
    End Sub    
    
    ' Search for fileName in the root directory of all disks.
    Sub FindFile(fileName As String)
        For i As Integer = 0 To diskLetters.Length - 1
            Console.WriteLine("Searching for {0} on {1}.", _
                fileName, diskLetters(i))
        
            ThreadPool.QueueUserWorkItem(AddressOf FindCallback, _ 
                New State(autoEvents(i), diskLetters(i) & fileName))
        Next i

        ' Wait for the first instance of the file to be found.
        Dim index As Integer = _
            WaitHandle.WaitAny(autoEvents, 3000, False)
        If index = WaitHandle.WaitTimeout
            Console.WriteLine(vbCrLf & "{0} not found.", fileName)
        Else
            Console.WriteLine(vbCrLf & "{0} found on {1}.", _
                fileName, diskLetters(index))
        End If
    End Sub

    ' Search for stateInfo.fileName.
    Sub FindCallback(state As Object)
        Dim stateInfo As State = DirectCast(state, State)

        ' Signal if the file is found.
        If File.Exists(stateInfo.fileName) Then
            stateInfo.autoEvent.Set()
        End If
    End Sub

End Class

備註

如果millisecondsTimeout為零,此方法不會封鎖。If millisecondsTimeout is zero, the method does not block. 它會測試等候控制代碼的狀態,並立即傳回。It tests the state of the wait handles and returns immediately.

AbandonedMutexException 是.NET Framework 2.0 版中的新功能。AbandonedMutexException is new in the .NET Framework version 2.0. 在舊版中,WaitAny方法會傳回true如果等候完成,因為已放棄 mutex。In previous versions, the WaitAny method returns true if the wait completes because a mutex is abandoned. 已放棄的 mutex 通常表示嚴重的程式碼錯誤。An abandoned mutex often indicates a serious coding error. 如果是全系統 mutex,則可能表示,應用程式已意外終止 (例如,透過使用 Windows 工作管理員)。In the case of a system-wide mutex, it might indicate that an application has been terminated abruptly (for example, by using Windows Task Manager). 例外狀況包含資訊適用於偵錯。The exception contains information useful for debugging.

WaitAny方法會擲回AbandonedMutexException只等待完成時因為遭到放棄的 mutex。The WaitAny method throws an AbandonedMutexException only when the wait completes because of an abandoned mutex. 如果waitHandles包含具有較低的索引編號,已放棄的 mutex,比釋放的 mutexWaitAny方法正常完成,並不會擲回例外狀況。If waitHandles contains a released mutex with a lower index number than the abandoned mutex, the WaitAny method completes normally and the exception is not thrown.

注意

在版本早於 2.0 版中,如果執行緒結束或中止而不需要明確地釋放的.NET framework Mutex,且Mutex位於索引 0 (零),在WaitAny陣列在另一個執行緒,所傳回的索引上WaitAny是128 而不是 0。In versions of the .NET Framework earlier than version 2.0, if a thread exits or aborts without explicitly releasing a Mutex, and that Mutex is at index 0 (zero) in a WaitAny array on another thread, the index returned by WaitAny is 128 instead of 0.

這個方法傳回時則等候會終止,任何控制代碼會收到信號或發生逾時。This method returns when the wait terminates, either when any of the handles are signaled or when a timeout occurs. 如果在呼叫期間,多個物件會變成收到訊號,則傳回的值會是物件的已收到訊號具有已收到訊號的所有物件的最小的索引值的陣列索引。If more than one object becomes signaled during the call, the return value is the array index of the signaled object with the smallest index value of all the signaled objects. 在某些實作中,如果有多個傳遞 64 的控制代碼,NotSupportedException就會擲回。On some implementations, if more that 64 handles are passed, a NotSupportedException is thrown.

在結束內容的資訊Notes on Exiting the Context

exitContext參數沒有任何作用,除非WaitAny從非預設受管理的內容中呼叫方法。The exitContext parameter has no effect unless the WaitAny method is called from inside a nondefault managed context. 如果您的執行緒是衍生自類別的執行個體的呼叫在此情形ContextBoundObjectThis can happen if your thread is inside a call to an instance of a class derived from ContextBoundObject. 即使您目前正在執行的方法不是衍生自的類別上ContextBoundObject,例如String,您可以在非預設內容中如果ContextBoundObject您目前的應用程式定義域中的堆疊上。Even if you are currently executing a method on a class that does not derive from ContextBoundObject, like String, you can be in a nondefault context if a ContextBoundObject is on your stack in the current application domain.

時的非預設內容中執行您的程式碼,在指定trueexitContext造成執行緒結束的非預設的 managed 的內容 (也就是轉換成預設內容) 執行之前WaitAny方法。When your code is executing in a nondefault context, specifying true for exitContext causes the thread to exit the nondefault managed context (that is, to transition to the default context) before executing the WaitAny method. 執行緒在呼叫之後返回原始的非預設內容WaitAny方法完成。The thread returns to the original nondefault context after the call to the WaitAny method completes.

這有助於進行內容繫結類別具有SynchronizationAttributeThis can be useful when the context-bound class has SynchronizationAttribute. 在此情況下,所有呼叫類別的成員會自動同步都處理,並同步處理領域是類別程式碼的整個主體。In that case, all calls to members of the class are automatically synchronized, and the synchronization domain is the entire body of code for the class. 如果成員的呼叫堆疊中的程式碼會呼叫WaitAny方法,並指定trueexitContext,執行緒結束同步處理網域,讓執行緒上呼叫物件的任何成員,以繼續進行封鎖。If code in the call stack of a member calls the WaitAny method and specifies true for exitContext, the thread exits the synchronization domain, allowing a thread that is blocked on a call to any member of the object to proceed. WaitAny方法傳回時,進行呼叫的執行緒必須等待重新輸入一次同步處理領域。When the WaitAny method returns, the thread that made the call must wait to reenter the synchronization domain.

WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean) WaitAny(WaitHandle[], TimeSpan, Boolean)

等候指定陣列中的所有項目都收到信號,使用 TimeSpan 來指定時間間隔,並指定是否要先離開同步處理網域,再開始等候。Waits for any of the elements in the specified array to receive a signal, using a TimeSpan to specify the time interval and specifying whether to exit the synchronization domain before the wait.

public:
 static int WaitAny(cli::array <System::Threading::WaitHandle ^> ^ waitHandles, TimeSpan timeout, bool exitContext);
public static int WaitAny (System.Threading.WaitHandle[] waitHandles, TimeSpan timeout, bool exitContext);
static member WaitAny : System.Threading.WaitHandle[] * TimeSpan * bool -> int
Public Shared Function WaitAny (waitHandles As WaitHandle(), timeout As TimeSpan, exitContext As Boolean) As Integer

參數

waitHandles
WaitHandle[]

WaitHandle 陣列,包含目前執行個體將等候的物件。A WaitHandle array containing the objects for which the current instance will wait.

timeout
TimeSpan TimeSpan TimeSpan TimeSpan

TimeSpan,代表等候毫秒數;或是 TimeSpan,代表無限期等候的 -1 毫秒。A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

exitContext
Boolean Boolean Boolean Boolean

true 表示在等候 (如果在同步內容中) 前結束內容的同步處理網域,並於之後重新取得,否則為 falsetrue to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it afterward; otherwise, false.

傳回

滿足等候條件之物件的陣列索引;如果沒有物件滿足等候條件,而且已經過相當於 timeout 的時間間隔,則為 WaitTimeoutThe array index of the object that satisfied the wait, or WaitTimeout if no object satisfied the wait and a time interval equivalent to timeout has passed.

例外狀況

waitHandles 參數為 nullThe waitHandles parameter is null.

-或--or- waitHandles 陣列中的一或多個物件為 nullOne or more of the objects in the waitHandles array is null.

waitHandles 中的物件數目超過系統允許的數目。The number of objects in waitHandles is greater than the system permits.

waitHandles 是不具有項目的陣列,且 .NET Framework 版本為 1.0 或 1.1。waitHandles is an array with no elements, and the .NET Framework version is 1.0 or 1.1.

timeout 為 -1 毫秒以外的負數,表示無限逾時。timeout is a negative number other than -1 milliseconds, which represents an infinite time-out. -或--or- timeout 大於 MaxValuetimeout is greater than MaxValue.

由於執行緒結束時未釋放 Mutex,已完成等候。The wait completed because a thread exited without releasing a mutex. 在 Windows 98 或 Windows Millennium Edition 上不擲回這個例外狀況。This exception is not thrown on Windows 98 or Windows Millennium Edition.

waitHandles 是不具有元素的陣列,且 .NET Framework 版本為 2.0 (含) 以後版本。waitHandles is an array with no elements, and the .NET Framework version is 2.0 or later.

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。The waitHandles array contains a transparent proxy for a WaitHandle in another application domain.

範例

下列程式碼範例示範如何使用執行緒集區同時搜尋多個磁碟上的檔案。The following code example demonstrates how to use the thread pool to simultaneously search for a file on multiple disks. 如需空間考量,會搜尋只有每個磁碟的根目錄。For space considerations, only the root directory of each disk is searched.

using namespace System;
using namespace System::IO;
using namespace System::Threading;
ref class Search
{
private:

   // Maintain state information to pass to FindCallback.
   ref class State
   {
   public:
      AutoResetEvent^ autoEvent;
      String^ fileName;
      State( AutoResetEvent^ autoEvent, String^ fileName )
         : autoEvent( autoEvent ), fileName( fileName )
      {}

   };


public:
   array<AutoResetEvent^>^autoEvents;
   array<String^>^diskLetters;

   // Search for stateInfo->fileName.
   void FindCallback( Object^ state )
   {
      State^ stateInfo = dynamic_cast<State^>(state);
      
      // Signal if the file is found.
      if ( File::Exists( stateInfo->fileName ) )
      {
         stateInfo->autoEvent->Set();
      }
   }

   Search()
   {
      
      // Retrieve an array of disk letters.
      diskLetters = Environment::GetLogicalDrives();
      autoEvents = gcnew array<AutoResetEvent^>(diskLetters->Length);
      for ( int i = 0; i < diskLetters->Length; i++ )
      {
         autoEvents[ i ] = gcnew AutoResetEvent( false );

      }
   }


   // Search for fileName in the root directory of all disks.
   void FindFile( String^ fileName )
   {
      for ( int i = 0; i < diskLetters->Length; i++ )
      {
         Console::WriteLine(  "Searching for {0} on {1}.", fileName, diskLetters[ i ] );
         ThreadPool::QueueUserWorkItem( gcnew WaitCallback( this, &Search::FindCallback ), gcnew State( autoEvents[ i ],String::Concat( diskLetters[ i ], fileName ) ) );

      }
      
      // Wait for the first instance of the file to be found.
      int index = WaitHandle::WaitAny( autoEvents, TimeSpan(0,0,3), false );
      if ( index == WaitHandle::WaitTimeout )
      {
         Console::WriteLine( "\n{0} not found.", fileName );
      }
      else
      {
         Console::WriteLine( "\n{0} found on {1}.", fileName, diskLetters[ index ] );
      }
   }

};

int main()
{
   Search^ search = gcnew Search;
   search->FindFile( "SomeFile.dat" );
}

using System;
using System.IO;
using System.Threading;

class Test
{
    static void Main()
    {
        Search search = new Search();
        search.FindFile("SomeFile.dat");
    }
}

class Search
{
    // Maintain state information to pass to FindCallback.
    class State
    {
        public AutoResetEvent autoEvent;
        public string         fileName;

        public State(AutoResetEvent autoEvent, string fileName)
        {
            this.autoEvent    = autoEvent;
            this.fileName     = fileName;
        }
    }

    AutoResetEvent[] autoEvents;
    String[] diskLetters;

    public Search()
    {
        // Retrieve an array of disk letters.
        diskLetters = Environment.GetLogicalDrives();

        autoEvents = new AutoResetEvent[diskLetters.Length];
        for(int i = 0; i < diskLetters.Length; i++)
        {
            autoEvents[i] = new AutoResetEvent(false);
        }
    }

    // Search for fileName in the root directory of all disks.
    public void FindFile(string fileName)
    {
        for(int i = 0; i < diskLetters.Length; i++)
        {
            Console.WriteLine("Searching for {0} on {1}.",
                fileName, diskLetters[i]);
            ThreadPool.QueueUserWorkItem(
                new WaitCallback(FindCallback), 
                new State(autoEvents[i], diskLetters[i] + fileName));
        }

        // Wait for the first instance of the file to be found.
        int index = WaitHandle.WaitAny(
            autoEvents, new TimeSpan(0, 0, 3), false);
        if(index == WaitHandle.WaitTimeout)
        {
            Console.WriteLine("\n{0} not found.", fileName);
        }
        else
        {
            Console.WriteLine("\n{0} found on {1}.", fileName,
                diskLetters[index]);
        }
    }

    // Search for stateInfo.fileName.
    void FindCallback(object state)
    {
        State stateInfo = (State)state;

        // Signal if the file is found.
        if(File.Exists(stateInfo.fileName))
        {
            stateInfo.autoEvent.Set();
        }
    }
}
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Threading

Public Class Test

    <MTAThread> _
    Shared Sub Main()
        Dim search As New Search()
        search.FindFile("SomeFile.dat")
    End Sub    
End Class

Public Class Search

    ' Maintain state information to pass to FindCallback.
    Class State
        Public autoEvent As AutoResetEvent 
        Public fileName As String         

        Sub New(anEvent As AutoResetEvent, fName As String)
            autoEvent = anEvent
            fileName = fName
        End Sub
    End Class

    Dim autoEvents() As AutoResetEvent
    Dim diskLetters() As String

    Sub New()

        ' Retrieve an array of disk letters.
        diskLetters = Environment.GetLogicalDrives()

        autoEvents = New AutoResetEvent(diskLetters.Length - 1) {}
        For i As Integer = 0 To diskLetters.Length - 1
            autoEvents(i) = New AutoResetEvent(False)
        Next i
    End Sub    
    
    ' Search for fileName in the root directory of all disks.
    Sub FindFile(fileName As String)
        For i As Integer = 0 To diskLetters.Length - 1
            Console.WriteLine("Searching for {0} on {1}.", _
                fileName, diskLetters(i))
        
            ThreadPool.QueueUserWorkItem(AddressOf FindCallback, _ 
                New State(autoEvents(i), diskLetters(i) & fileName))
        Next i

        ' Wait for the first instance of the file to be found.
        Dim index As Integer = WaitHandle.WaitAny( _
            autoEvents, New TimeSpan(0, 0, 3), False)
        If index = WaitHandle.WaitTimeout
            Console.WriteLine(vbCrLf & "{0} not found.", fileName)
        Else
            Console.WriteLine(vbCrLf & "{0} found on {1}.", _
                fileName, diskLetters(index))
        End If
    End Sub

    ' Search for stateInfo.fileName.
    Sub FindCallback(state As Object)
        Dim stateInfo As State = DirectCast(state, State)

        ' Signal if the file is found.
        If File.Exists(stateInfo.fileName) Then
            stateInfo.autoEvent.Set()
        End If
    End Sub

End Class

備註

如果timeout為零,此方法不會封鎖。If timeout is zero, the method does not block. 它會測試等候控制代碼的狀態,並立即傳回。It tests the state of the wait handles and returns immediately.

AbandonedMutexException 是.NET Framework 2.0 版中的新功能。AbandonedMutexException is new in the .NET Framework version 2.0. 在舊版中,WaitAny方法會傳回true如果等候完成,因為已放棄 mutex。In previous versions, the WaitAny method returns true if the wait completes because a mutex is abandoned. 已放棄的 mutex 通常表示嚴重的程式碼錯誤。An abandoned mutex often indicates a serious coding error. 如果是全系統 mutex,則可能表示,應用程式已意外終止 (例如,透過使用 Windows 工作管理員)。In the case of a system-wide mutex, it might indicate that an application has been terminated abruptly (for example, by using Windows Task Manager). 例外狀況包含資訊適用於偵錯。The exception contains information useful for debugging.

WaitAny方法會擲回AbandonedMutexException只等待完成時因為遭到放棄的 mutex。The WaitAny method throws an AbandonedMutexException only when the wait completes because of an abandoned mutex. 如果waitHandles包含具有較低的索引編號,已放棄的 mutex,比釋放的 mutexWaitAny方法正常完成,並不會擲回例外狀況。If waitHandles contains a released mutex with a lower index number than the abandoned mutex, the WaitAny method completes normally and the exception is not thrown.

注意

在版本早於 2.0 版中,如果執行緒結束或中止而不需要明確地釋放的.NET framework Mutex,且Mutex位於索引 0 (零),在WaitAny陣列在另一個執行緒,所傳回的索引上WaitAny是128 而不是 0。In versions of the .NET Framework earlier than version 2.0, if a thread exits or aborts without explicitly releasing a Mutex, and that Mutex is at index 0 (zero) in a WaitAny array on another thread, the index returned by WaitAny is 128 instead of 0.

這個方法傳回時則等候會終止,任何控制代碼會收到信號或逾時發生時。This method returns when the wait terminates, either when any of the handles are signaled or when a time-out occurs. 如果在呼叫期間,多個物件會變成收到訊號,則傳回的值會是物件的已收到訊號具有已收到訊號的所有物件的最小的索引值的陣列索引。If more than one object becomes signaled during the call, the return value is the array index of the signaled object with the smallest index value of all the signaled objects. 在某些實作中,如果有多個傳遞 64 的控制代碼,NotSupportedException就會擲回。On some implementations, if more that 64 handles are passed, a NotSupportedException is thrown.

最大值timeoutInt32.MaxValueThe maximum value for timeout is Int32.MaxValue.

在結束內容的資訊Notes on Exiting the Context

exitContext參數沒有任何作用,除非WaitAny從非預設受管理的內容中呼叫方法。The exitContext parameter has no effect unless the WaitAny method is called from inside a nondefault managed context. 如果您的執行緒是衍生自類別的執行個體的呼叫在此情形ContextBoundObjectThis can happen if your thread is inside a call to an instance of a class derived from ContextBoundObject. 即使您目前正在執行的方法不是衍生自的類別上ContextBoundObject,例如String,您可以在非預設內容中如果ContextBoundObject您目前的應用程式定義域中的堆疊上。Even if you are currently executing a method on a class that does not derive from ContextBoundObject, like String, you can be in a nondefault context if a ContextBoundObject is on your stack in the current application domain.

時的非預設內容中執行您的程式碼,在指定trueexitContext造成執行緒結束的非預設的 managed 的內容 (也就是轉換成預設內容) 執行之前WaitAny方法。When your code is executing in a nondefault context, specifying true for exitContext causes the thread to exit the nondefault managed context (that is, to transition to the default context) before executing the WaitAny method. 執行緒在呼叫之後返回原始的非預設內容WaitAny方法完成。The thread returns to the original nondefault context after the call to the WaitAny method completes.

這有助於進行內容繫結類別具有SynchronizationAttributeThis can be useful when the context-bound class has SynchronizationAttribute. 在此情況下,所有呼叫類別的成員會自動同步都處理,並同步處理領域是類別程式碼的整個主體。In that case, all calls to members of the class are automatically synchronized, and the synchronization domain is the entire body of code for the class. 如果成員的呼叫堆疊中的程式碼會呼叫WaitAny方法,並指定trueexitContext,執行緒結束同步處理網域,讓執行緒上呼叫物件的任何成員,以繼續進行封鎖。If code in the call stack of a member calls the WaitAny method and specifies true for exitContext, the thread exits the synchronization domain, allowing a thread that is blocked on a call to any member of the object to proceed. WaitAny方法傳回時,進行呼叫的執行緒必須等待重新輸入一次同步處理領域。When the WaitAny method returns, the thread that made the call must wait to reenter the synchronization domain.

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