Thread.GetApartmentState Methode

Definition

Gibt einen ApartmentState-Wert zurück, der den Apartmentzustand angibt.Returns an ApartmentState value indicating the apartment state.

public:
 System::Threading::ApartmentState GetApartmentState();
public System.Threading.ApartmentState GetApartmentState ();
member this.GetApartmentState : unit -> System.Threading.ApartmentState
Public Function GetApartmentState () As ApartmentState

Gibt zurück

Einer der ApartmentState-Werte, der den Apartmentzustand des verwalteten Threads angibt.One of the ApartmentState values indicating the apartment state of the managed thread. Der Standardwert ist Unknown.The default is Unknown.

Beispiele

Im folgenden Codebeispiel werden die Methoden GetApartmentState, SetApartmentStateund TrySetApartmentState veranschaulicht.The following code example demonstrates the GetApartmentState, SetApartmentState, and TrySetApartmentState methods. Im Codebeispiel wird ein Thread erstellt.The code example creates a thread. Bevor der Thread gestartet wird, zeigt GetApartmentState den anfänglichen ApartmentState.Unknown Status an, und SetApartmentState ändert den Status in ApartmentState.STA.Before the thread is started, GetApartmentState displays the initial ApartmentState.Unknown state and SetApartmentState changes the state to ApartmentState.STA. Die TrySetApartmentState-Methode gibt dann false zurück, wenn versucht wird, den Zustand in ApartmentState.MTA zu ändern, da der Apartment Zustand bereits festgelegt ist.The TrySetApartmentState method then returns false when attempting to change the state to ApartmentState.MTA because the apartment state is already set. Wenn der gleiche Vorgang mit SetApartmentStateversucht wurde, wurde InvalidOperationException ausgelöst.If the same operation had been attempted with SetApartmentState, InvalidOperationException would have been thrown.

Nachdem der Thread gestartet wurde, wird die TrySetApartmentState-Methode erneut verwendet.After the thread is started, the TrySetApartmentState method is used again. Dieses Mal wird ThreadStateException ausgelöst, da der Thread bereits gestartet wurde.This time it throws ThreadStateException because the thread has already been started.

using namespace System;
using namespace System::Threading;

void ThreadProc()
{
    Thread::Sleep(2000);
};

void main()
{
    Thread^ t = gcnew Thread(gcnew ThreadStart(ThreadProc));
    Console::WriteLine("Before setting apartment state: {0}", 
            t->GetApartmentState());

    t->SetApartmentState(ApartmentState::STA);
    Console::WriteLine("After setting apartment state: {0}", 
        t->GetApartmentState());

    bool result = t->TrySetApartmentState(ApartmentState::MTA);
    Console::WriteLine("Try to change state: {0}", result);

    t->Start();

    Thread::Sleep(500);

    try
    {
        t->TrySetApartmentState(ApartmentState::STA);
    }
    catch (ThreadStateException^)
    {
        Console::WriteLine("ThreadStateException occurs " +
            "if apartment state is set after starting thread.");
    }

    t->Join();
}

/* This code example produces the following output:

Before setting apartment state: Unknown
After setting apartment state: STA
Try to change state: False
ThreadStateException occurs if apartment state is set after starting thread.
 */
using System;
using System.Threading;

class Example
{
    public static void Main()
    {
        Thread t = new Thread(ThreadProc);
        Console.WriteLine("Before setting apartment state: {0}", 
            t.GetApartmentState());

        t.SetApartmentState(ApartmentState.STA);
        Console.WriteLine("After setting apartment state: {0}", 
            t.GetApartmentState());

        bool result = t.TrySetApartmentState(ApartmentState.MTA);
        Console.WriteLine("Try to change state: {0}", result);

        t.Start();

        Thread.Sleep(500);

        try
        {
            t.TrySetApartmentState(ApartmentState.STA);
        }
        catch (ThreadStateException)
        {
            Console.WriteLine("ThreadStateException occurs " +
                "if apartment state is set after starting thread.");
        }

        t.Join();
    }

    public static void ThreadProc()
    {
        Thread.Sleep(2000);
    }
}

/* This code example produces the following output:

Before setting apartment state: Unknown
After setting apartment state: STA
Try to change state: False
ThreadStateException occurs if apartment state is set after starting thread.
 */
Imports System.Threading

Module Example

    Sub Main()
 
        Dim t As New Thread(AddressOf ThreadProc)
        Console.WriteLine("Before setting apartment state: {0}", _
            t.GetApartmentState())

        t.SetApartmentState(ApartmentState.STA)
        Console.WriteLine("After setting apartment state: {0}", _
            t.GetApartmentState())

        Dim result As Boolean = _
            t.TrySetApartmentState(ApartmentState.MTA)
        Console.WriteLine("Try to change state: {0}", result)

        t.Start()

        Thread.Sleep(500)

        Try
            t.TrySetApartmentState(ApartmentState.STA)
        Catch ex As ThreadStateException
            Console.WriteLine("ThreadStateException occurs " & _
                "if apartment state is set after starting thread.")
        End Try

        t.Join()
    End Sub

    Sub ThreadProc()
        Thread.Sleep(2000)
    End Sub
End Module

' This code example produces the following output:
'
'Before setting apartment state: Unknown
'After setting apartment state: STA
'Try to change state: False
'ThreadStateException occurs if apartment state is set after starting thread.

Hinweise

Diese Methode ersetzt zusammen mit der SetApartmentState-Methode und der TrySetApartmentState-Methode die ApartmentState-Eigenschaft.This method, along with the SetApartmentState method and the TrySetApartmentState method, replaces the ApartmentState property.

Gilt für: