ThreadStart ThreadStart ThreadStart ThreadStart Delegate

定義

Thread で実行するメソッドを表します。Represents the method that executes on a Thread.

public delegate void ThreadStart();
[System.Runtime.InteropServices.ComVisible(true)]
public delegate void ThreadStart();
type ThreadStart = delegate of unit -> unit
Public Delegate Sub ThreadStart()
継承
ThreadStartThreadStartThreadStartThreadStart
属性

次のコード例は、インスタンスメソッドと静的メソッドをThreadStart使用してデリゲートを作成および使用するための構文を示しています。The following code example shows the syntax for creating and using a ThreadStart delegate with an instance method and with a static method.

デリゲートをThreadStart作成する方法を示すもう1つの簡単な例Thread.Start()については、メソッドのオーバーロードに関する説明を参照してください。For another simple example that demonstrates how to create a ThreadStart delegate, see the Thread.Start() method overload. スレッド作成の詳細については、「開始時にスレッドを作成してデータを渡す」を参照してください。For more information about thread creation, see Creating Threads and Passing Data at Start Time.

using namespace System;
using namespace System::Threading;
ref class Work
{
public:
   static void DoWork()
   {
      Console::WriteLine( "Static thread procedure." );
   }

   int Data;
   void DoMoreWork()
   {
      Console::WriteLine( "Instance thread procedure. Data={0}", Data );
   }

};

int main()
{
   
   // To start a thread using an instance method for the thread 
   // procedure, specify the object as the first argument of the
   // ThreadStart constructor.
   //
   Work^ w = gcnew Work;
   w->Data = 42;
   ThreadStart^ threadDelegate = gcnew ThreadStart( w, &Work::DoMoreWork );
   Thread^ newThread = gcnew Thread( threadDelegate );
   newThread->Start();
   
   // To start a thread using a static thread procedure, specify
   // only the address of the procedure. This is a change from 
   // earlier versions of the .NET Framework, which required 
   // two arguments, the first of which was null (0).
   //
   threadDelegate = gcnew ThreadStart( &Work::DoWork );
   newThread = gcnew Thread( threadDelegate );
   newThread->Start();
}

/* This code example produces the following output (the order 
   of the lines might vary):
Static thread procedure.
Instance thread procedure. Data=42
 */
using System;
using System.Threading;

class Test
{
    static void Main() 
    {
        // To start a thread using a static thread procedure, use the
        // class name and method name when you create the ThreadStart
        // delegate. Beginning in version 2.0 of the .NET Framework,
        // it is not necessary to create a delegate explicitly. 
        // Specify the name of the method in the Thread constructor, 
        // and the compiler selects the correct delegate. For example:
        //
        // Thread newThread = new Thread(Work.DoWork);
        //
        ThreadStart threadDelegate = new ThreadStart(Work.DoWork);
        Thread newThread = new Thread(threadDelegate);
        newThread.Start();

        // To start a thread using an instance method for the thread 
        // procedure, use the instance variable and method name when 
        // you create the ThreadStart delegate. Beginning in version
        // 2.0 of the .NET Framework, the explicit delegate is not
        // required.
        //
        Work w = new Work();
        w.Data = 42;
        threadDelegate = new ThreadStart(w.DoMoreWork);
        newThread = new Thread(threadDelegate);
        newThread.Start();
    }
}

class Work 
{
    public static void DoWork() 
    {
        Console.WriteLine("Static thread procedure."); 
    }
    public int Data;
    public void DoMoreWork() 
    {
        Console.WriteLine("Instance thread procedure. Data={0}", Data); 
    }
}

/* This code example produces the following output (the order 
   of the lines might vary):
Static thread procedure.
Instance thread procedure. Data=42
 */
Imports System.Threading

Public Class Test

    <MTAThread> _
    Shared Sub Main()
        ' To start a thread using a static thread procedure, use the
        ' class name and method name when you create the ThreadStart
        ' delegate. Visual Basic expands the AddressOf expression 
        ' to the appropriate delegate creation syntax:
        '    New ThreadStart(AddressOf Work.DoWork)
        '
        Dim newThread As New Thread(AddressOf Work.DoWork)
        newThread.Start()

        ' To start a thread using an instance method for the thread 
        ' procedure, use the instance variable and method name when 
        ' you create the ThreadStart delegate. Visual Basic expands 
        ' the AddressOf expression to the appropriate delegate 
        ' creation syntax:
        '    New ThreadStart(AddressOf w.DoMoreWork)
        '
        Dim w As New Work()
        w.Data = 42
        newThread = new Thread(AddressOf w.DoMoreWork)
        newThread.Start()
    End Sub
End Class

Public Class Work 
    Public Shared Sub DoWork()
        Console.WriteLine("Static thread procedure.")
    End Sub
    Public Data As Integer
    Public Sub DoMoreWork() 
        Console.WriteLine("Instance thread procedure. Data={0}", Data) 
    End Sub
End Class

' This code example produces the following output (the order 
'   of the lines might vary):
'
'Static thread procedure.
'Instance thread procedure. Data=42

注釈

マネージスレッドが作成されると、スレッドで実行されるメソッドは、 ThreadStartデリゲート、 ParameterizedThreadStartまたはThreadコンストラクターに渡されるデリゲートによって表されます。When a managed thread is created, the method that executes on the thread is represented by a ThreadStart delegate or a ParameterizedThreadStart delegate that is passed to the Thread constructor. Thread.Startメソッドが呼び出されるまで、スレッドは実行を開始しません。The thread does not begin executing until the Thread.Start method is called. ThreadStartまたはParameterizedThreadStartデリゲートによって表されるメソッドの最初の行から実行が開始されます。Execution begins at the first line of the method represented by the ThreadStart or ParameterizedThreadStart delegate.

注意

Visual Basic とC#ユーザーは、 ThreadStartスレッドのParameterizedThreadStart作成時にまたはデリゲートコンストラクターを省略できます。Visual Basic and C# users can omit the ThreadStart or ParameterizedThreadStart delegate constructor when creating a thread. Visual Basic では、メソッドAddressOfThreadコンストラクターに渡すときに演算子を使用します。 Dim t As New Thread(AddressOf ThreadProc)たとえば、のようにします。In Visual Basic, use the AddressOf operator when passing your method to the Thread constructor; for example, Dim t As New Thread(AddressOf ThreadProc). でC#は、単にスレッドプロシージャの名前を指定します。In C#, simply specify the name of the thread procedure. コンパイラは、正しいデリゲートコンストラクターを選択します。The compiler selects the correct delegate constructor.

.NET Framework C++2.0 以降では、静的メソッドのThreadStartデリゲートを作成するために必要なパラメーターは、コールバックメソッドのアドレス (クラス名によって修飾されたもの) だけです。For C++, starting with .NET Framework 2.0, creating a ThreadStart delegate for a static method requires only one parameter: the address of the callback method, qualified by the class name. 以前のバージョンでは、静的メソッドのデリゲートを作成するときに2つのパラメーターが必要でした。ゼロ (null) とメソッドアドレスです。In earlier versions two parameters were required when creating a delegate for a static method: zero (null) and the method address. インスタンスメソッドの場合、すべてのバージョンには、インスタンス変数とメソッドアドレスの2つのパラメーターが必要です。For an instance method, all versions require two parameters: the instance variable and the method address.

拡張メソッド

GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate)

指定したデリゲートによって表されるメソッドを表すオブジェクトを取得します。Gets an object that represents the method represented by the specified delegate.

適用対象

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