ThreadStart ThreadStart ThreadStart ThreadStart Delegate

Definición

Representa el método que se ejecuta en Thread.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()
Herencia
ThreadStartThreadStartThreadStartThreadStart
Atributos

Ejemplos

El ejemplo de código siguiente muestra la sintaxis para crear y usar un ThreadStart delegado con un método de instancia y con un método estático.The following code example shows the syntax for creating and using a ThreadStart delegate with an instance method and with a static method.

Para obtener otro ejemplo simple que muestra cómo crear un ThreadStart delegado, vea la Thread.Start() sobrecarga del método.For another simple example that demonstrates how to create a ThreadStart delegate, see the Thread.Start() method overload. Para obtener más información sobre la creación de subprocesos, vea crear subprocesos y pasar datos en tiempo de inicio.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

Comentarios

Cuando se crea un subproceso administrado, el método que se ejecuta en el subproceso representado por un ThreadStart delegado o un ParameterizedThreadStart delegado que se pasa a la Thread constructor.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. El subproceso no comienza a ejecutarse hasta que el Thread.Start se llama al método.The thread does not begin executing until the Thread.Start method is called. La ejecución comienza en la primera línea del método representado por la ThreadStart o ParameterizedThreadStart delegar.Execution begins at the first line of the method represented by the ThreadStart or ParameterizedThreadStart delegate.

Nota

Los usuarios de Visual Basic y C# pueden omitir el ThreadStart o ParameterizedThreadStart constructor de delegado al crear un subproceso.Visual Basic and C# users can omit the ThreadStart or ParameterizedThreadStart delegate constructor when creating a thread. En Visual Basic, utilice el AddressOf operador al pasar el método para el Thread constructor; por ejemplo, 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). En C#, simplemente especifique el nombre del procedimiento de subproceso.In C#, simply specify the name of the thread procedure. El compilador selecciona el constructor de delegado correcto.The compiler selects the correct delegate constructor.

Para C++, a partir de .NET Framework 2.0, la creación de un ThreadStart delegado para un método estático requiere sólo un parámetro: la dirección del método de devolución de llamada, calificado con el nombre de clase.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. En versiones anteriores se requerían dos parámetros al crear un delegado para un método estático: cero (null) y la dirección del método.In earlier versions two parameters were required when creating a delegate for a static method: zero (null) and the method address. Para un método de instancia, todas las versiones requieren dos parámetros: la variable de instancia y la dirección del método.For an instance method, all versions require two parameters: the instance variable and the method address.

Métodos de extensión

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

Obtiene un objeto que representa el método representado por el delegado especificado.Gets an object that represents the method represented by the specified delegate.

Se aplica a

Consulte también: