WaitHandle.WaitAll 方法

參考

定義

命名空間:: System.Threading

組件:: System.Runtime.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

等候指定陣列中的所有項目都收到信號。

多載

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。
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。
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。
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。
WaitAll(WaitHandle[])	等候指定陣列中的所有項目都收到信號。

WaitAll(WaitHandle[], TimeSpan, Boolean)

來源:: WaitHandle.cs

來源:: WaitHandle.cs

來源:: WaitHandle.cs

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。

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。這個陣列不能包含相同物件的多個參考。

timeout: TimeSpan

TimeSpan，代表要等候的毫秒數；或是 TimeSpan，代表永遠等候的 -1 毫秒。

exitContext: 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 false。

傳回

Boolean

當 waitHandles 中的所有元素都收到訊號時，則為 true，否則為 false。

例外狀況

ArgumentNullException

waitHandles 參數為 null。

-或-

waitHandles 陣列中的一或多個物件為 null。

-或-

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 2.0 或更新版本。

DuplicateWaitObjectException

waitHandles 陣列包含重複的項目。

NotSupportedException

waitHandles 中的物件數目超過系統允許的數目。

-或-

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。

ApplicationException

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 1.0 或 1.1。

ArgumentOutOfRangeException

timeout 為 -1 毫秒以外的負數，表示無限逾時。

-或-

timeout 大於 Int32.MaxValue。

AbandonedMutexException

由於執行緒結束時未釋放 Mutex，已結束等候。

InvalidOperationException

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。

範例

下列程式代碼範例示範如何使用線程集區，以異步方式建立和寫入檔案群組。每個寫入作業都會排入佇列作為工作專案，並在完成時發出訊號。主線程會等候所有專案發出訊號，然後結束。

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.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，則方法不會封鎖。它會測試等候句柄的狀態，並立即傳回。

如果放棄 Mutex， AbandonedMutexException 則會擲回。放棄的 Mutex 通常表示嚴重的編碼錯誤。在全系統 Mutex 的情況下，它可能表示應用程式已突然終止 (，例如使用 Windows 任務管理員) 。例外狀況包含可用於偵錯的資訊。

方法 WaitAll 會在等候終止時傳回，這表示所有句柄都會發出訊號或發生逾時。如果傳遞超過 64 個句柄， NotSupportedException 則會擲回。如果陣列包含重複專案，呼叫將會失敗。

備註

WaitAll處於狀態的STA線程不支援方法。

的最大值 timeout 為 Int32.MaxValue。

結束內容

exitContext除非從非預設 Managed 內容內呼叫這個方法，否則參數沒有作用。如果您的線程位於衍生自 ContextBoundObject之類別實例的呼叫內，則Managed內容可以是非預設的。即使您目前正在不是衍生自 ContextBoundObject的類別上執行方法，例如 String，如果在 ContextBoundObject 目前應用程式域中的堆疊上，您仍可以位於非預設內容中。

當您的程式代碼在非預設內容中執行時，指定 true 會導致 exitContext 線程結束非預設受控內容 (，也就是在執行此方法之前轉換至默認內容) 。線程會在呼叫這個方法完成之後，傳回原始的非預設內容。

當內容系結類別具有 SynchronizationAttribute 屬性時，結束內容可能會很有用。在此情況下，類別成員的所有呼叫都會自動同步處理，而且同步處理網域是類別的整個程式代碼主體。如果成員呼叫堆疊中的程式代碼呼叫此方法並指定 trueexitContext，則線程會結束同步處理網域，這可讓呼叫物件的任何成員上封鎖的線程繼續進行。當這個方法傳回時，發出呼叫的線程必須等候重新進入同步處理網域。

適用於

.NET 9 和其他版本

產品	版本
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

WaitAll(WaitHandle[], Int32, Boolean)

來源:: WaitHandle.cs

來源:: WaitHandle.cs

來源:: WaitHandle.cs

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。

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。這個陣列無法包含相同物件 (複本) 的多個參考。

millisecondsTimeout: Int32

要等候的毫秒數，如果要無限期等候，則為 Infinite (-1)。

exitContext: 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 false。

傳回

Boolean

當 waitHandles 中的所有項目都收到信號時，則為 true；否則為 false。

例外狀況

ArgumentNullException

waitHandles 參數為 null。

-或-

waitHandles 陣列中的一或多個物件為 null。

-或-

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 2.0 或更新版本。

DuplicateWaitObjectException

waitHandles 陣列包含重複的項目。

NotSupportedException

waitHandles 中的物件數目超過系統允許的數目。

-或-

目前的執行緒是 STA 狀態，而 waitHandles 包含多個元素。

ApplicationException

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 1.0 或 1.1。

ArgumentOutOfRangeException

millisecondsTimeout 為 -1 以外的負數，表示無限逾時。

AbandonedMutexException

由於執行緒結束時未釋放 Mutex，已完成等候。

InvalidOperationException

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。

範例

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.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，則方法不會封鎖。它會測試等候句柄的狀態，並立即傳回。

方法 WaitAll 會在等候終止時傳回，這表示當發出所有句柄的訊號或發生逾時時。如果傳遞超過 64 個句柄， NotSupportedException 則會擲回。如果陣列中有重複項目，呼叫會失敗並出現 DuplicateWaitObjectException。

備註

WaitAll處於狀態的STA線程不支援方法。

結束內容

當內容系結類別具有 SynchronizationAttribute 屬性時，結束內容可能會很有用。在此情況下，類別成員的所有呼叫都會自動同步處理，而且同步處理網域是類別的整個程式代碼主體。如果成員呼叫堆疊中的程式代碼呼叫此方法並指定 trueexitContext，則線程會結束同步處理網域，這可讓呼叫物件的任何成員上封鎖的線程繼續進行。當這個方法傳回時，進行呼叫的線程必須等候重新進入同步處理網域。

適用於

.NET 9 和其他版本

產品	版本
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

WaitAll(WaitHandle[], TimeSpan)

來源:: WaitHandle.cs

來源:: WaitHandle.cs

來源:: WaitHandle.cs

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。

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。這個陣列不能包含相同物件的多個參考。

timeout: TimeSpan

TimeSpan，代表要等候的毫秒數；或是 TimeSpan，代表永遠等候的 -1 毫秒。

傳回

Boolean

當 waitHandles 中的所有項目都收到信號時，則為 true；否則為 false。

例外狀況

ArgumentNullException

waitHandles 參數為 null。

-或-

waitHandles 陣列中的一或多個物件為 null。

-或-

waitHandles 是不含任何項目的陣列。

DuplicateWaitObjectException

waitHandles 陣列包含重複的項目。

注意：在適用於 Microsoft Store 的 .NET 應用程式或可攜式類別庫中，請改為捕捉基底類別例外狀況 ArgumentException。

NotSupportedException

waitHandles 中的物件數目超過系統允許的數目。

-或-

目前的執行緒是 STA 狀態，而 waitHandles 包含多個元素。

ArgumentOutOfRangeException

timeout 為 -1 毫秒以外的負數，表示無限逾時。

-或-

timeout 大於 Int32.MaxValue。

AbandonedMutexException

由於執行緒結束時未釋放 Mutex，已結束等候。

InvalidOperationException

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。

備註

如果 timeout 為零，則方法不會封鎖。它會測試等候句柄的狀態，並立即傳回。

方法 WaitAll 會在等候終止時傳回，這表示所有句柄都會發出訊號或發生逾時。如果傳遞超過 64 個 NotSupportedException 句柄，則會擲回。如果陣列包含重複專案，呼叫將會失敗。

備註

WaitAll在處於狀態的STA線程上不支援方法。

最大 timeout 值為 Int32.MaxValue。

呼叫這個方法多載與呼叫 WaitAll(WaitHandle[], TimeSpan, Boolean) 多載和針對 exitContext指定false相同。

適用於

.NET 9 和其他版本

產品	版本
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WaitAll(WaitHandle[], Int32)

來源:: WaitHandle.cs

來源:: WaitHandle.cs

來源:: WaitHandle.cs

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。

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。這個陣列無法包含相同物件 (複本) 的多個參考。

millisecondsTimeout: Int32

要等候的毫秒數，如果要無限期等候，則為 Infinite (-1)。

傳回

Boolean

當 waitHandles 中的所有項目都收到信號時，則為 true；否則為 false。

例外狀況

ArgumentNullException

waitHandles 參數為 null。

-或-

waitHandles 陣列中的一或多個物件為 null。

-或-

waitHandles 是不含任何項目的陣列。

DuplicateWaitObjectException

waitHandles 陣列包含重複的項目。

注意：在適用於 Microsoft Store 的 .NET 應用程式或可攜式類別庫中，請改為捕捉基底類別例外狀況 ArgumentException。

NotSupportedException

waitHandles 中的物件數目超過系統允許的數目。

-或-

目前的執行緒是 STA 狀態，而 waitHandles 包含多個元素。

ArgumentOutOfRangeException

millisecondsTimeout 為 -1 以外的負數，表示無限逾時。

AbandonedMutexException

由於執行緒結束時未釋放 Mutex，已完成等候。

InvalidOperationException

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。

備註

如果 millisecondsTimeout 為零，則方法不會封鎖。它會測試等候句柄的狀態，並立即傳回。

方法 WaitAll 會在等候終止時傳回，這表示當發出所有句柄的訊號或發生逾時時。如果傳遞超過 64 個 NotSupportedException 句柄，則會擲回。如果陣列中有重複項目，呼叫會失敗並 DuplicateWaitObjectException出現。

備註

WaitAll在處於狀態的STA線程上不支援方法。

呼叫這個方法多載與呼叫 WaitAll(WaitHandle[], Int32, Boolean) 多載和針對 exitContext指定false相同。

適用於

.NET 9 和其他版本

產品	版本
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WaitAll(WaitHandle[])

來源:: WaitHandle.cs

來源:: WaitHandle.cs

來源:: WaitHandle.cs

等候指定陣列中的所有項目都收到信號。

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。這個陣列不能包含相同物件的多個參考。

傳回

Boolean

當 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。

例外狀況

ArgumentNullException

waitHandles 參數為 null。 -或-

waitHandles 陣列中的一或多個物件為 null。

-或-

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 2.0 或更新版本。

DuplicateWaitObjectException

waitHandles 陣列包含重複的項目。

注意：在適用於 Microsoft Store 的 .NET 應用程式或可攜式類別庫中，請改為捕捉基底類別例外狀況 ArgumentException。

NotSupportedException

waitHandles 中的物件數目超過系統允許的數目。

-或-

目前的執行緒是 STA 狀態，而 waitHandles 包含多個元素。

ApplicationException

waitHandles 是沒有任何項目的陣列，且 .NET Framework 版本為 1.0 或 1.1。

AbandonedMutexException

由於執行緒結束時未釋放 Mutex，已結束等候。

InvalidOperationException

waitHandles 陣列在另一個應用程式定義域中包含 WaitHandle 的 Transparent Proxy。

範例

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.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 版的新功能。在舊版中 WaitAll ，方法會在 true 放棄 Mutex 時傳回。已放棄的 Mutex 通常表示嚴重的程式代碼撰寫錯誤。在全系統 Mutex 的情況下，它可能表示應用程式已突然終止 (例如，使用 Windows 任務管理員) 。例外狀況包含適用於偵錯的資訊。

當發出所有句柄的訊號時，方法 WaitAll 會傳回。如果傳遞超過 64 個 NotSupportedException 句柄，則會擲回。如果陣列包含重複項目，呼叫會失敗並 DuplicateWaitObjectException出現。

備註

WaitAll在處於狀態的STA線程上不支援方法。

呼叫這個方法多載相當於呼叫 WaitAll(WaitHandle[], Int32, Boolean) 方法多載，併為和指定 -1 (或 Timeout.Infinite) millisecondsTimeouttrueexitContext。

適用於

.NET 9 和其他版本

產品	版本
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

分享方式：

WaitHandle.WaitAll 方法

定義

多載

WaitAll(WaitHandle[], TimeSpan, Boolean)

參數

傳回

例外狀況

範例

備註

結束內容

適用於

WaitAll(WaitHandle[], Int32, Boolean)

參數

傳回

例外狀況

範例

備註

結束內容

適用於

WaitAll(WaitHandle[], TimeSpan)

參數

傳回

例外狀況

備註

適用於

WaitAll(WaitHandle[], Int32)

參數

傳回

例外狀況

備註

適用於

WaitAll(WaitHandle[])

參數

傳回

例外狀況

範例

備註

適用於

更多資源