WaitHandle.WaitAll WaitHandle.WaitAll WaitHandle.WaitAll WaitHandle.WaitAll Method

定義

等候指定陣列中的所有項目都收到信號。Waits for all the elements in the specified array to receive a signal.

多載

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

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

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

等候指定陣列中的所有項目都收到信號,使用 Int32 值來指定時間間隔,並指定是否要先離開同步處理網域,再開始等候。Waits for all the elements in the specified array to receive a signal, using an Int32 value to specify the time interval and specifying whether to exit the synchronization domain before the wait.

WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan)

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

WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32)

等候指定陣列中的所有項目都收到信號,使用 Int32 值來指定時間間隔。Waits for all the elements in the specified array to receive a signal, using an Int32 value to specify the time interval.

WaitAll(WaitHandle[]) WaitAll(WaitHandle[]) WaitAll(WaitHandle[]) WaitAll(WaitHandle[])

等候指定陣列中的所有項目都收到信號。Waits for all the elements in the specified array to receive a signal.

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

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

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

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. 這個陣列不能包含相同物件的多個參考。This array cannot contain multiple references to the same object.

timeout
TimeSpan TimeSpan TimeSpan TimeSpan

TimeSpan,代表要等候的毫秒數;或是 TimeSpan,代表永遠等候的 -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

waitHandles 中的所有元素都收到訊號時,則為 true,否則為 falsetrue when every element in waitHandles has received a signal; otherwise false.

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.

-或--or- waitHandles 是沒有任何項目的陣列,且 .NET Framework 版本為 2.0 或更新版本。waitHandles is an array with no elements and the .NET Framework version is 2.0 or later.

waitHandles 陣列包含重複的項目。The waitHandles array contains elements that are duplicates.

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.

-或--or- STAThreadAttribute 屬性會套用至目前執行緒的執行緒程序,且 waitHandles 包含多個項目。The STAThreadAttribute attribute is applied to the thread procedure for the current thread, and waitHandles contains more than one element.

waitHandles 是沒有任何項目的陣列,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,已結束等候。The wait terminated 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 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,以非同步方式建立和寫入檔案群組。The following code example shows how to use the thread pool to asynchronously create and write to a group of files. 完成後,工作項目以及訊號每一個寫入作業已排入佇列。Each write operation is queued as a work item and signals when it is finished. 主執行緒等候發出信號的所有項目,然後結束。The main thread waits for all the items to signal and then exits.

using namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
using namespace System::Threading;

// Maintain state to pass to WriteToFile.
ref class State
{
public:
   String^ fileName;
   array<Byte>^byteArray;
   ManualResetEvent^ manualEvent;
   State( String^ fileName, array<Byte>^byteArray, ManualResetEvent^ manualEvent )
      : fileName( fileName ), byteArray( byteArray ), manualEvent( manualEvent )
   {}

};

ref class Writer
{
private:
   static int workItemCount = 0;
   Writer(){}


public:
   static void WriteToFile( Object^ state )
   {
      int workItemNumber = workItemCount;
      Interlocked::Increment( workItemCount );
      Console::WriteLine( "Starting work item {0}.", workItemNumber.ToString() );
      State^ stateInfo = dynamic_cast<State^>(state);
      FileStream^ fileWriter;
      
      // Create and write to the file.
      try
      {
         fileWriter = gcnew FileStream( stateInfo->fileName,FileMode::Create );
         fileWriter->Write( stateInfo->byteArray, 0, stateInfo->byteArray->Length );
      }
      finally
      {
         if ( fileWriter != nullptr )
         {
            fileWriter->Close();
         }
         
         // Signal main() that the work item has finished.
         Console::WriteLine( "Ending work item {0}.", workItemNumber.ToString() );
         stateInfo->manualEvent->Set();
      }

   }

};

int main()
{
   const int numberOfFiles = 5;
   String^ dirName =  "C:\\TestTest";
   String^ fileName;
   array<Byte>^byteArray;
   Random^ randomGenerator = gcnew Random;
   array<ManualResetEvent^>^manualEvents = gcnew array<ManualResetEvent^>(numberOfFiles);
   State^ stateInfo;
   if (  !Directory::Exists( dirName ) )
   {
      Directory::CreateDirectory( dirName );
   }

   
   // Queue the work items that create and write to the files.
   for ( int i = 0; i < numberOfFiles; i++ )
   {
      fileName = String::Concat( dirName,  "\\Test", ((i)).ToString(),  ".dat" );
      
      // Create random data to write to the file.
      byteArray = gcnew array<Byte>(1000000);
      randomGenerator->NextBytes( byteArray );
      manualEvents[ i ] = gcnew ManualResetEvent( false );
      stateInfo = gcnew State( fileName,byteArray,manualEvents[ i ] );
      ThreadPool::QueueUserWorkItem( gcnew WaitCallback( &Writer::WriteToFile ), stateInfo );

   }
   
   // Since ThreadPool threads are background threads, 
   // wait for the work items to signal before exiting.
   if ( WaitHandle::WaitAll( manualEvents, TimeSpan(0,0,5), false ) )
   {
      Console::WriteLine( "Files written - main exiting." );
   }
   else
   {
      
      // The wait operation times out.
      Console::WriteLine( "Error writing files - main exiting." );
   }
}

using System;
using System.IO;
using System.Security.Permissions;
using System.Threading;

class Test
{
    static void Main()
    {
        const int numberOfFiles = 5;
        string dirName = @"C:\TestTest";
        string fileName;

        byte[] byteArray;
        Random randomGenerator = new Random();

        ManualResetEvent[] manualEvents = 
            new ManualResetEvent[numberOfFiles];
        State stateInfo;

        if(!Directory.Exists(dirName))
        {
            Directory.CreateDirectory(dirName);
        }

        // Queue the work items that create and write to the files.
        for(int i = 0; i < numberOfFiles; i++)
        {
            fileName = string.Concat(
                dirName, @"\Test", i.ToString(), ".dat");

            // Create random data to write to the file.
            byteArray = new byte[1000000];
            randomGenerator.NextBytes(byteArray);

            manualEvents[i] = new ManualResetEvent(false);

            stateInfo = 
                new State(fileName, byteArray, manualEvents[i]);

            ThreadPool.QueueUserWorkItem(new WaitCallback(
                Writer.WriteToFile), stateInfo);
        }
    
        // Since ThreadPool threads are background threads, 
        // wait for the work items to signal before exiting.
        if(WaitHandle.WaitAll(
            manualEvents, new TimeSpan(0, 0, 5), false))
        {
            Console.WriteLine("Files written - main exiting.");
        }
        else
        {
            // The wait operation times out.
            Console.WriteLine("Error writing files - main exiting.");
        }
    }
}

// Maintain state to pass to WriteToFile.
class State
{
    public string fileName;
    public byte[] byteArray;
    public ManualResetEvent manualEvent;

    public State(string fileName, byte[] byteArray, 
        ManualResetEvent manualEvent)
    {
        this.fileName = fileName;
        this.byteArray = byteArray;
        this.manualEvent = manualEvent;
    }
}

class Writer
{
    static int workItemCount = 0;
    Writer() {}

    public static void WriteToFile(object state)
    {
        int workItemNumber = workItemCount;
        Interlocked.Increment(ref workItemCount);
        Console.WriteLine("Starting work item {0}.",
            workItemNumber.ToString());
        State stateInfo = (State)state;
        FileStream fileWriter = null;

        // Create and write to the file.
        try
        {
            fileWriter = new FileStream(
                stateInfo.fileName, FileMode.Create);
            fileWriter.Write(stateInfo.byteArray, 
                0, stateInfo.byteArray.Length);
        }
        finally
        {
            if(fileWriter != null)
            {
                fileWriter.Close();
            }

            // Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", 
                workItemNumber.ToString());
            stateInfo.manualEvent.Set();
        }
    }
}
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading

Public Class Test

    ' WaitHandle.WaitAll requires a multithreaded apartment 
    ' when using multiple wait handles.
    <MTAThreadAttribute> _
    Shared Sub Main()
        Const numberOfFiles As Integer = 5
        Dim dirName As String = "C:\TestTest"
        Dim fileName As String 

        Dim byteArray() As Byte 
        Dim randomGenerator As New Random()

        Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
        Dim stateInfo As State 

        If Directory.Exists(dirName) <> True Then
            Directory.CreateDirectory(dirName)
        End If

        ' Queue the work items that create and write to the files.
        For i As Integer = 0 To numberOfFiles - 1
            fileName = String.Concat( _
                dirName, "\Test", i.ToString(), ".dat")

            ' Create random data to write to the file.
            byteArray = New Byte(1000000){}
            randomGenerator.NextBytes(byteArray)

            manualEvents(i) = New ManualResetEvent(false)

            stateInfo = _ 
                New State(fileName, byteArray, manualEvents(i))

            ThreadPool.QueueUserWorkItem(AddressOf _
                Writer.WriteToFile, stateInfo)
        Next i
    
        ' Since ThreadPool threads are background threads, 
        ' wait for the work items to signal before exiting.
        If WaitHandle.WaitAll( _
            manualEvents, New TimeSpan(0, 0, 5), false) = True  Then

            Console.WriteLine("Files written - main exiting.")
        Else
        
            ' The wait operation times out.
            Console.WriteLine("Error writing files - main exiting.")
        End If
    End Sub

End Class
 
' Maintain state to pass to WriteToFile.
Public Class State

    Public fileName As String
    Public byteArray As Byte()
    Public manualEvent As ManualResetEvent

    Sub New(fileName As String, byteArray() As Byte, _
        manualEvent As ManualResetEvent)
    
        Me.fileName = fileName
        Me.byteArray = byteArray
        Me.manualEvent = manualEvent
    End Sub

End Class

Public Class Writer

    Private Sub New()
    End Sub

    Shared workItemCount As Integer = 0

    Shared Sub WriteToFile(state As Object)
        Dim workItemNumber As Integer = workItemCount
        Interlocked.Increment(workItemCount)
        Console.WriteLine("Starting work item {0}.", _
            workItemNumber.ToString())
        Dim stateInfo As State = CType(state, State)
        Dim fileWriter As FileStream = Nothing

        ' Create and write to the file.
        Try
            fileWriter = New FileStream( _
                stateInfo.fileName, FileMode.Create)
            fileWriter.Write(stateInfo.byteArray, _
                0, stateInfo.byteArray.Length)
        Finally
            If Not fileWriter Is Nothing Then
                fileWriter.Close()
            End If

            ' Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", _
                workItemNumber.ToString())
            stateInfo.manualEvent.Set()
        End Try
    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,WaitAll方法會傳回true時放棄的 mutex。In previous versions, the WaitAll method returns true when 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.

WaitAll方法傳回時則等候會終止,這表示可能是所有控制代碼會收到信號,或發生逾時。The WaitAll method returns when the wait terminates, which means either all the handles are signaled or a time-out occurs. 在某些實作中,若傳遞了 64 個以上的控制代碼,NotSupportedException就會擲回。On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown. 如果陣列包含重複的項目,則呼叫會失敗。If the array contains duplicates, the call will fail.

注意

WaitAll擁有的執行緒上不支援方法STAThreadAttributeThe WaitAll method is not supported on threads that have STAThreadAttribute.

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WaitAll從非預設受管理的內容中呼叫方法。The exitContext parameter has no effect unless the WaitAll 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 is not derived 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WaitAll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 WaitAll method. 它會傳回呼叫之後為原始的非預設內容WaitAll方法完成。It returns to the original nondefault context after the call to the WaitAll 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WaitAll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 WaitAll 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. WaitAll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 WaitAll method returns, the thread that made the call must wait to reenter the synchronization domain.

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

等候指定陣列中的所有項目都收到信號,使用 Int32 值來指定時間間隔,並指定是否要先離開同步處理網域,再開始等候。Waits for all the elements in the specified array to receive a signal, using an Int32 value to specify the time interval and specifying whether to exit the synchronization domain before the wait.

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

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. 這個陣列無法包含相同物件 (複本) 的多個參考。This array cannot contain multiple references to the same object (duplicates).

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

waitHandles 中的所有項目都收到信號時,則為 true;否則為 falsetrue when every element in waitHandles has received a signal; otherwise, false.

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.

-或--or- waitHandles 是沒有任何項目的陣列,且 .NET Framework 版本為 2.0 或更新版本。waitHandles is an array with no elements and the .NET Framework version is 2.0 or later.

waitHandles 陣列包含重複的項目。The waitHandles array contains elements that are duplicates.

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.

-或--or- STAThreadAttribute 屬性會套用至目前執行緒的執行緒程序,且 waitHandles 包含多個項目。The STAThreadAttribute attribute is applied to the thread procedure for the current thread, and waitHandles contains more than one element.

waitHandles 是沒有任何項目的陣列,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 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,以非同步方式建立和寫入檔案群組。The following code example shows how to use the thread pool to asynchronously create and write to a group of files. 完成後,工作項目以及訊號每一個寫入作業已排入佇列。Each write operation is queued as a work item and signals when it is finished. 主執行緒等候發出信號的所有項目,然後結束。The main thread waits for all the items to signal and then exits.

using namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
using namespace System::Threading;

// Maintain state to pass to WriteToFile.
ref class State
{
public:
   String^ fileName;
   array<Byte>^byteArray;
   ManualResetEvent^ manualEvent;
   State( String^ fileName, array<Byte>^byteArray, ManualResetEvent^ manualEvent )
      : fileName( fileName ), byteArray( byteArray ), manualEvent( manualEvent )
   {}

};

ref class Writer
{
private:
   static int workItemCount = 0;
   Writer(){}


public:
   static void WriteToFile( Object^ state )
   {
      int workItemNumber = workItemCount;
      Interlocked::Increment( workItemCount );
      Console::WriteLine( "Starting work item {0}.", workItemNumber.ToString() );
      State^ stateInfo = dynamic_cast<State^>(state);
      FileStream^ fileWriter;
      
      // Create and write to the file.
      try
      {
         fileWriter = gcnew FileStream( stateInfo->fileName,FileMode::Create );
         fileWriter->Write( stateInfo->byteArray, 0, stateInfo->byteArray->Length );
      }
      finally
      {
         if ( fileWriter != nullptr )
         {
            fileWriter->Close();
         }
         
         // Signal main() that the work item has finished.
         Console::WriteLine( "Ending work item {0}.", workItemNumber.ToString() );
         stateInfo->manualEvent->Set();
      }

   }

};

int main()
{
   const int numberOfFiles = 5;
   String^ dirName =  "C:\\TestTest";
   String^ fileName;
   array<Byte>^byteArray;
   Random^ randomGenerator = gcnew Random;
   array<ManualResetEvent^>^manualEvents = gcnew array<ManualResetEvent^>(numberOfFiles);
   State^ stateInfo;
   if (  !Directory::Exists( dirName ) )
   {
      Directory::CreateDirectory( dirName );
   }

   
   // Queue the work items that create and write to the files.
   for ( int i = 0; i < numberOfFiles; i++ )
   {
      fileName = String::Concat( dirName,  "\\Test", ((i)).ToString(),  ".dat" );
      
      // Create random data to write to the file.
      byteArray = gcnew array<Byte>(1000000);
      randomGenerator->NextBytes( byteArray );
      manualEvents[ i ] = gcnew ManualResetEvent( false );
      stateInfo = gcnew State( fileName,byteArray,manualEvents[ i ] );
      ThreadPool::QueueUserWorkItem( gcnew WaitCallback( &Writer::WriteToFile ), stateInfo );

   }
   
   // Since ThreadPool threads are background threads, 
   // wait for the work items to signal before exiting.
   if ( WaitHandle::WaitAll( manualEvents, 5000, false ) )
   {
      Console::WriteLine( "Files written - main exiting." );
   }
   else
   {
      
      // The wait operation times out.
      Console::WriteLine( "Error writing files - main exiting." );
   }
}

using System;
using System.IO;
using System.Security.Permissions;
using System.Threading;

class Test
{
    static void Main()
    {
        const int numberOfFiles = 5;
        string dirName = @"C:\TestTest";
        string fileName;

        byte[] byteArray;
        Random randomGenerator = new Random();

        ManualResetEvent[] manualEvents = 
            new ManualResetEvent[numberOfFiles];
        State stateInfo;

        if(!Directory.Exists(dirName))
        {
            Directory.CreateDirectory(dirName);
        }

        // Queue the work items that create and write to the files.
        for(int i = 0; i < numberOfFiles; i++)
        {
            fileName = string.Concat(
                dirName, @"\Test", i.ToString(), ".dat");

            // Create random data to write to the file.
            byteArray = new byte[1000000];
            randomGenerator.NextBytes(byteArray);

            manualEvents[i] = new ManualResetEvent(false);

            stateInfo = 
                new State(fileName, byteArray, manualEvents[i]);

            ThreadPool.QueueUserWorkItem(new WaitCallback(
                Writer.WriteToFile), stateInfo);
        }
    
        // Since ThreadPool threads are background threads, 
        // wait for the work items to signal before exiting.
        if(WaitHandle.WaitAll(manualEvents, 5000, false))
        {
            Console.WriteLine("Files written - main exiting.");
        }
        else
        {
            // The wait operation times out.
            Console.WriteLine("Error writing files - main exiting.");
        }
    }
}

// Maintain state to pass to WriteToFile.
class State
{
    public string fileName;
    public byte[] byteArray;
    public ManualResetEvent manualEvent;

    public State(string fileName, byte[] byteArray, 
        ManualResetEvent manualEvent)
    {
        this.fileName = fileName;
        this.byteArray = byteArray;
        this.manualEvent = manualEvent;
    }
}

class Writer
{
    static int workItemCount = 0;
    Writer() {}

    public static void WriteToFile(object state)
    {
        int workItemNumber = workItemCount;
        Interlocked.Increment(ref workItemCount);
        Console.WriteLine("Starting work item {0}.",
            workItemNumber.ToString());
        State stateInfo = (State)state;
        FileStream fileWriter = null;

        // Create and write to the file.
        try
        {
            fileWriter = new FileStream(
                stateInfo.fileName, FileMode.Create);
            fileWriter.Write(stateInfo.byteArray, 
                0, stateInfo.byteArray.Length);
        }
        finally
        {
            if(fileWriter != null)
            {
                fileWriter.Close();
            }

            // Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", 
                workItemNumber.ToString());
            stateInfo.manualEvent.Set();
        }
    }
}
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading

Public Class Test

    ' WaitHandle.WaitAll requires a multithreaded apartment 
    ' when using multiple wait handles.
    <MTAThreadAttribute> _
    Shared Sub Main()
        Const numberOfFiles As Integer = 5
        Dim dirName As String = "C:\TestTest"
        Dim fileName As String 

        Dim byteArray() As Byte 
        Dim randomGenerator As New Random()

        Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
        Dim stateInfo As State 

        If Directory.Exists(dirName) <> True Then
            Directory.CreateDirectory(dirName)
        End If

        ' Queue the work items that create and write to the files.
        For i As Integer = 0 To numberOfFiles - 1
            fileName = String.Concat( _
                dirName, "\Test", i.ToString(), ".dat")

            ' Create random data to write to the file.
            byteArray = New Byte(1000000){}
            randomGenerator.NextBytes(byteArray)

            manualEvents(i) = New ManualResetEvent(false)

            stateInfo = _ 
                New State(fileName, byteArray, manualEvents(i))

            ThreadPool.QueueUserWorkItem(AddressOf _
                Writer.WriteToFile, stateInfo)
        Next i
    
        ' Since ThreadPool threads are background threads, 
        ' wait for the work items to signal before exiting.
        If WaitHandle.WaitAll(manualEvents, 5000, false) = True  Then

            Console.WriteLine("Files written - main exiting.")
        Else
        
            ' The wait operation times out.
            Console.WriteLine("Error writing files - main exiting.")
        End If
    End Sub

End Class
 
' Maintain state to pass to WriteToFile.
Public Class State

    Public fileName As String
    Public byteArray As Byte()
    Public manualEvent As ManualResetEvent

    Sub New(fileName As String, byteArray() As Byte, _
        manualEvent As ManualResetEvent)
    
        Me.fileName = fileName
        Me.byteArray = byteArray
        Me.manualEvent = manualEvent
    End Sub

End Class

Public Class Writer

    Private Sub New()
    End Sub

    Shared workItemCount As Integer = 0

    Shared Sub WriteToFile(state As Object)
        Dim workItemNumber As Integer = workItemCount
        Interlocked.Increment(workItemCount)
        Console.WriteLine("Starting work item {0}.", _
            workItemNumber.ToString())
        Dim stateInfo As State = CType(state, State)
        Dim fileWriter As FileStream = Nothing

        ' Create and write to the file.
        Try
            fileWriter = New FileStream( _
                stateInfo.fileName, FileMode.Create)
            fileWriter.Write(stateInfo.byteArray, _
                0, stateInfo.byteArray.Length)
        Finally
            If Not fileWriter Is Nothing Then
                fileWriter.Close()
            End If

            ' Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", _
                workItemNumber.ToString())
            stateInfo.manualEvent.Set()
        End Try
    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,WaitAll方法會傳回true時放棄的 mutex。In previous versions, the WaitAll method returns true when 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.

WaitAll方法會傳回在等候終止時,這表示所有控制代碼會收到信號或逾時發生時。The WaitAll method returns when the wait terminates, which means either when all the handles are signaled or when time-out occurs. 在某些實作中,若傳遞了 64 個以上的控制代碼,NotSupportedException就會擲回。On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown. 如果陣列中有重複的項目,則呼叫會失敗並DuplicateWaitObjectExceptionIf there are duplicates in the array, the call fails with a DuplicateWaitObjectException.

注意

WaitAll擁有的執行緒上不支援方法STAThreadAttributeThe WaitAll method is not supported on threads that have STAThreadAttribute.

在結束內容的資訊Notes on Exiting the Context

exitContext參數沒有任何作用,除非WaitAll從非預設受管理的內容中呼叫方法。The exitContext parameter has no effect unless the WaitAll 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 is not derived 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WaitAll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 WaitAll method. 執行緒在呼叫之後返回原始的非預設內容WaitAll方法完成。The thread returns to the original nondefault context after the call to the WaitAll method completes.

這有助於進行內容繫結類別具有SynchronizationAttribute屬性。This can be useful when the context-bound class has the SynchronizationAttribute attribute. 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WaitAll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 WaitAll 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. WaitAll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 WaitAll method returns, the thread that made the call must wait to reenter the synchronization domain.

WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan) WaitAll(WaitHandle[], TimeSpan)

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

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

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. 這個陣列不能包含相同物件的多個參考。This array cannot contain multiple references to the same object.

timeout
TimeSpan TimeSpan TimeSpan TimeSpan

TimeSpan,代表要等候的毫秒數;或是 TimeSpan,代表永遠等候的 -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

waitHandles 中的所有項目都收到信號時,則為 true;否則為 falsetrue when every element in waitHandles has received a signal; otherwise, false.

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.

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

適用於 Windows 市集應用程式的 .NET 或是可攜式類別庫中,改為攔截基底類別例外狀況ArgumentExceptionIn the .NET for Windows Store apps or the Portable Class Library, catch the base class exception, ArgumentException, instead.

waitHandles 陣列包含重複的項目。The waitHandles array contains elements that are duplicates.

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.

-或--or- STAThreadAttribute 屬性會套用至目前執行緒的執行緒程序,且 waitHandles 包含多個項目。The STAThreadAttribute attribute is applied to the thread procedure for the current thread, and waitHandles contains more than one element.

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,已結束等候。The wait terminated 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 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.

WaitAll方法傳回時則等候會終止,這表示可能是所有控制代碼會收到信號,或發生逾時。The WaitAll method returns when the wait terminates, which means either all the handles are signaled or a time-out occurs. 在某些實作中,若傳遞了 64 個以上的控制代碼,NotSupportedException就會擲回。On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown. 如果陣列包含重複的項目,則呼叫會失敗。If the array contains duplicates, the call will fail.

注意

WaitAll擁有的執行緒上不支援方法STAThreadAttributeThe WaitAll method is not supported on threads that have STAThreadAttribute.

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WaitAll(WaitHandle[], TimeSpan, Boolean)多載,並指定falseexitContextCalling this method overload is the same as calling the WaitAll(WaitHandle[], TimeSpan, Boolean) overload and specifying false for exitContext.

WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32) WaitAll(WaitHandle[], Int32)

等候指定陣列中的所有項目都收到信號,使用 Int32 值來指定時間間隔。Waits for all the elements in the specified array to receive a signal, using an Int32 value to specify the time interval.

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

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. 這個陣列無法包含相同物件 (複本) 的多個參考。This array cannot contain multiple references to the same object (duplicates).

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

waitHandles 中的所有項目都收到信號時,則為 true;否則為 falsetrue when every element in waitHandles has received a signal; otherwise, false.

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.

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

適用於 Windows 市集應用程式的 .NET 或是可攜式類別庫中,改為攔截基底類別例外狀況ArgumentExceptionIn the .NET for Windows Store apps or the Portable Class Library, catch the base class exception, ArgumentException, instead.

waitHandles 陣列包含重複的項目。The waitHandles array contains elements that are duplicates.

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.

-或--or- STAThreadAttribute 屬性會套用至目前執行緒的執行緒程序,且 waitHandles 包含多個項目。The STAThreadAttribute attribute is applied to the thread procedure for the current thread, and waitHandles contains more than one element.

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 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.

WaitAll方法會傳回在等候終止時,這表示所有控制代碼會收到信號或逾時發生時。The WaitAll method returns when the wait terminates, which means either when all the handles are signaled or when time-out occurs. 在某些實作中,若傳遞了 64 個以上的控制代碼,NotSupportedException就會擲回。On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown. 如果陣列中有重複的項目,則呼叫會失敗並DuplicateWaitObjectExceptionIf there are duplicates in the array, the call fails with a DuplicateWaitObjectException.

注意

WaitAll擁有的執行緒上不支援方法STAThreadAttributeThe WaitAll method is not supported on threads that have STAThreadAttribute.

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

WaitAll(WaitHandle[]) WaitAll(WaitHandle[]) WaitAll(WaitHandle[]) WaitAll(WaitHandle[])

等候指定陣列中的所有項目都收到信號。Waits for all the elements in the specified array to receive a signal.

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

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. 這個陣列不能包含相同物件的多個參考。This array cannot contain multiple references to the same object.

傳回

waitHandles 中的所有項目都收到信號時,則為 true;否則絕不會傳回這個方法。true when every element in waitHandles has received a signal; otherwise the method never returns.

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 are null.

-或--or- waitHandles 是沒有任何項目的陣列,且 .NET Framework 版本為 2.0 或更新版本。waitHandles is an array with no elements and the .NET Framework version is 2.0 or later.

適用於 Windows 市集應用程式的 .NET 或是可攜式類別庫中,改為攔截基底類別例外狀況ArgumentExceptionIn the .NET for Windows Store apps or the Portable Class Library, catch the base class exception, ArgumentException, instead.

waitHandles 陣列包含重複的項目。The waitHandles array contains elements that are duplicates.

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.

-或--or- STAThreadAttribute 屬性會套用至目前執行緒的執行緒程序,且 waitHandles 包含多個項目。The STAThreadAttribute attribute is applied to the thread procedure for the current thread, and waitHandles contains more than one element.

waitHandles 是沒有任何項目的陣列,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,已結束等候。The wait terminated 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 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,以非同步方式建立和寫入檔案群組。The following code example shows how to use the thread pool to asynchronously create and write to a group of files. 完成後,工作項目以及訊號每一個寫入作業已排入佇列。Each write operation is queued as a work item and signals when it is finished. 主執行緒等候發出信號的所有項目,然後結束。The main thread waits for all the items to signal and then exits.

using namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
using namespace System::Threading;

ref class State
{
public:
   String^ fileName;
   array<Byte>^byteArray;
   ManualResetEvent^ manualEvent;
   State( String^ fileName, array<Byte>^byteArray, ManualResetEvent^ manualEvent )
      : fileName( fileName ), byteArray( byteArray ), manualEvent( manualEvent )
   {}

};

ref class Writer
{
private:
   static int workItemCount = 0;
   Writer(){}


public:
   static void WriteToFile( Object^ state )
   {
      int workItemNumber = workItemCount;
      Interlocked::Increment( workItemCount );
      Console::WriteLine( "Starting work item {0}.", workItemNumber.ToString() );
      State^ stateInfo = dynamic_cast<State^>(state);
      FileStream^ fileWriter;
      
      // Create and write to the file.
      try
      {
         fileWriter = gcnew FileStream( stateInfo->fileName,FileMode::Create );
         fileWriter->Write( stateInfo->byteArray, 0, stateInfo->byteArray->Length );
      }
      finally
      {
         if ( fileWriter != nullptr )
         {
            fileWriter->Close();
         }
         
         // Signal main() that the work item has finished.
         Console::WriteLine( "Ending work item {0}.", workItemNumber.ToString() );
         stateInfo->manualEvent->Set();
      }

   }

};

void main()
{
   const int numberOfFiles = 5;
   String^ dirName =  "C:\\TestTest";
   String^ fileName;
   array<Byte>^byteArray;
   Random^ randomGenerator = gcnew Random;
   array<ManualResetEvent^>^manualEvents = gcnew array<ManualResetEvent^>(numberOfFiles);
   State^ stateInfo;
   if (  !Directory::Exists( dirName ) )
   {
      Directory::CreateDirectory( dirName );
   }

   
   // Queue the work items that create and write to the files.
   for ( int i = 0; i < numberOfFiles; i++ )
   {
      fileName = String::Concat( dirName,  "\\Test", ((i)).ToString(),  ".dat" );
      
      // Create random data to write to the file.
      byteArray = gcnew array<Byte>(1000000);
      randomGenerator->NextBytes( byteArray );
      manualEvents[ i ] = gcnew ManualResetEvent( false );
      stateInfo = gcnew State( fileName,byteArray,manualEvents[ i ] );
      ThreadPool::QueueUserWorkItem( gcnew WaitCallback( &Writer::WriteToFile ), stateInfo );

   }
   
   // Since ThreadPool threads are background threads, 
   // wait for the work items to signal before exiting.
   WaitHandle::WaitAll( manualEvents );
   Console::WriteLine( "Files written - main exiting." );
}

using System;
using System.IO;
using System.Security.Permissions;
using System.Threading;

class Test
{
    static void Main()
    {
        const int numberOfFiles = 5;
        string dirName = @"C:\TestTest";
        string fileName;

        byte[] byteArray;
        Random randomGenerator = new Random();

        ManualResetEvent[] manualEvents = 
            new ManualResetEvent[numberOfFiles];
        State stateInfo;

        if(!Directory.Exists(dirName))
        {
            Directory.CreateDirectory(dirName);
        }

        // Queue the work items that create and write to the files.
        for(int i = 0; i < numberOfFiles; i++)
        {
            fileName = string.Concat(
                dirName, @"\Test", i.ToString(), ".dat");

            // Create random data to write to the file.
            byteArray = new byte[1000000];
            randomGenerator.NextBytes(byteArray);

            manualEvents[i] = new ManualResetEvent(false);

            stateInfo = 
                new State(fileName, byteArray, manualEvents[i]);

            ThreadPool.QueueUserWorkItem(new WaitCallback(
                Writer.WriteToFile), stateInfo);
        }
    
        // Since ThreadPool threads are background threads, 
        // wait for the work items to signal before exiting.
        WaitHandle.WaitAll(manualEvents);
        Console.WriteLine("Files written - main exiting.");
    }
}

// Maintain state to pass to WriteToFile.
class State
{
    public string fileName;
    public byte[] byteArray;
    public ManualResetEvent manualEvent;

    public State(string fileName, byte[] byteArray, 
        ManualResetEvent manualEvent)
    {
        this.fileName = fileName;
        this.byteArray = byteArray;
        this.manualEvent = manualEvent;
    }
}

class Writer
{
    static int workItemCount = 0;
    Writer() {}

    public static void WriteToFile(object state)
    {
        int workItemNumber = workItemCount;
        Interlocked.Increment(ref workItemCount);
        Console.WriteLine("Starting work item {0}.",
            workItemNumber.ToString());
        State stateInfo = (State)state;
        FileStream fileWriter = null;

        // Create and write to the file.
        try
        {
            fileWriter = new FileStream(
                stateInfo.fileName, FileMode.Create);
            fileWriter.Write(stateInfo.byteArray, 
                0, stateInfo.byteArray.Length);
        }
        finally
        {
            if(fileWriter != null)
            {
                fileWriter.Close();
            }

            // Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", 
                workItemNumber.ToString());
            stateInfo.manualEvent.Set();
        }
    }
}
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading

Public Class Test

    ' WaitHandle.WaitAll requires a multithreaded apartment 
    ' when using multiple wait handles.
    <MTAThreadAttribute> _
    Shared Sub Main()
        Const numberOfFiles As Integer = 5
        Dim dirName As String = "C:\TestTest"
        Dim fileName As String 

        Dim byteArray() As Byte 
        Dim randomGenerator As New Random()

        Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
        Dim stateInfo As State 

        If Directory.Exists(dirName) <> True Then
            Directory.CreateDirectory(dirName)
        End If

        ' Queue the work items that create and write to the files.
        For i As Integer = 0 To numberOfFiles - 1
            fileName = String.Concat( _
                dirName, "\Test", i.ToString(), ".dat")

            ' Create random data to write to the file.
            byteArray = New Byte(1000000){}
            randomGenerator.NextBytes(byteArray)

            manualEvents(i) = New ManualResetEvent(false)

            stateInfo = _ 
                New State(fileName, byteArray, manualEvents(i))

            ThreadPool.QueueUserWorkItem(AddressOf _
                Writer.WriteToFile, stateInfo)
        Next i
    
        ' Since ThreadPool threads are background threads, 
        ' wait for the work items to signal before exiting.
        WaitHandle.WaitAll(manualEvents)
        Console.WriteLine("Files written - main exiting.")
    End Sub

End Class
 
' Maintain state to pass to WriteToFile.
Public Class State

    Public fileName As String
    Public byteArray As Byte()
    Public manualEvent As ManualResetEvent

    Sub New(fileName As String, byteArray() As Byte, _
        manualEvent As ManualResetEvent)
    
        Me.fileName = fileName
        Me.byteArray = byteArray
        Me.manualEvent = manualEvent
    End Sub

End Class

Public Class Writer

    Private Sub New()
    End Sub

    Shared workItemCount As Integer = 0

    Shared Sub WriteToFile(state As Object)
        Dim workItemNumber As Integer = workItemCount
        Interlocked.Increment(workItemCount)
        Console.WriteLine("Starting work item {0}.", _
            workItemNumber.ToString())
        Dim stateInfo As State = CType(state, State)
        Dim fileWriter As FileStream = Nothing

        ' Create and write to the file.
        Try
            fileWriter = New FileStream( _
                stateInfo.fileName, FileMode.Create)
            fileWriter.Write(stateInfo.byteArray, _
                0, stateInfo.byteArray.Length)
        Finally
            If Not fileWriter Is Nothing Then
                fileWriter.Close()
            End If

            ' Signal Main that the work item has finished.
            Console.WriteLine("Ending work item {0}.", _
                workItemNumber.ToString())
            stateInfo.manualEvent.Set()
        End Try
    End Sub

End Class

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,WaitAll方法會傳回true時放棄的 mutex。In previous versions, the WaitAll method returns true when 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.

WaitAll方法會傳回所有控制代碼會收到信號。The WaitAll method returns when all the handles are signaled. 在某些實作中,若傳遞了 64 個以上的控制代碼,NotSupportedException就會擲回。On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown. 如果陣列包含重複的項目,則呼叫會失敗並DuplicateWaitObjectExceptionIf the array contains duplicates, the call fails with a DuplicateWaitObjectException.

注意

WaitAll擁有的執行緒上不支援方法STAThreadAttributeThe WaitAll method is not supported on threads that have STAThreadAttribute.

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

適用於