ThreadStart ThreadStart ThreadStart ThreadStart Delegate

Definition

Stellt die Methode dar, die in einem Thread ausgeführt wird.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()
Vererbung
ThreadStartThreadStartThreadStartThreadStart
Attribute

Beispiele

Das folgende Codebeispiel zeigt die Syntax zum Erstellen und Verwenden einer ThreadStart delegieren und mit einer statischen Methode eine Instanzmethode handeln.The following code example shows the syntax for creating and using a ThreadStart delegate with an instance method and with a static method.

Für einen anderen einfachen Beispiel zur Veranschaulichung der Vorgehensweise: Erstellen einer ThreadStart delegieren, finden Sie unter den Thread.Start() -methodenüberladung.For another simple example that demonstrates how to create a ThreadStart delegate, see the Thread.Start() method overload. Weitere Informationen zum Erstellen von Threads finden Sie unter Erstellen von Threads und übergeben von Daten zur Startzeit.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
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

Hinweise

Wenn ein verwalteter Thread erstellt wird, wird die Methode, die auf dem Thread ausgeführt wird. durch dargestellt eine ThreadStart delegieren oder eine ParameterizedThreadStart Delegat, der an die Thread Konstruktor.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. Der Thread beginnt nicht ausgeführt werden, bis die Thread.Start Methode wird aufgerufen.The thread does not begin executing until the Thread.Start method is called. Die Ausführung beginnt, in der ersten Zeile der Methode, dargestellt durch die ThreadStart oder ParameterizedThreadStart delegieren.Execution begins at the first line of the method represented by the ThreadStart or ParameterizedThreadStart delegate.

Hinweis

Visual Basic und C#-Benutzer können Auslassen der ThreadStart oder ParameterizedThreadStart Konstruktor beim Erstellen eines Threads.Visual Basic and C# users can omit the ThreadStart or ParameterizedThreadStart delegate constructor when creating a thread. Verwenden Sie in Visual Basic die AddressOf Operator beim Übergeben der Methode, um die Thread Konstruktor, z. B. Dim t As New Thread(AddressOf ThreadProc).In Visual Basic, use the AddressOf operator when passing your method to the Thread constructor; for example, Dim t As New Thread(AddressOf ThreadProc). Geben Sie einfach den Namen der Threadprozedur, in c#.In C#, simply specify the name of the thread procedure. Der Compiler wählt die richtige Konstruktor.The compiler selects the correct delegate constructor.

Für C++, beginnend mit .NET Framework 2.0, zum Erstellen einer ThreadStart Delegat für eine statische Methode nur ein Parameter erforderlich: die Adresse der Rückrufmethode darstellt, mit dem Klassennamen qualifiziert.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. In früheren Versionen waren zwei Parameter erforderlich beim Erstellen eines Delegaten für eine statische Methode: 0 (Null) und die Adresse der Methode.In earlier versions two parameters were required when creating a delegate for a static method: zero (null) and the method address. Für eine Instanzmethode, alle Versionen, die zwei Parameter erforderlich: die Instanzvariable und die Adresse der Methode.For an instance method, all versions require two parameters: the instance variable and the method address.

Extension Methods

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

Ruft ein Objekt ab, das die Methode darstellt, die vom angegebenen Delegaten dargestellt wird.Gets an object that represents the method represented by the specified delegate.

Gilt für:

Siehe auch