property bool Connected { bool get(); };
public bool Connected { get; }
member this.Connected : bool
Public ReadOnly Property Connected As Boolean
Console::WriteLine( "Winsock error: {0}", Convert::ToString(
System::Runtime::InteropServices::Marshal::GetLastWin32Error() ) );
// This is how you can determine whether a socket is still connected.
bool blockingState = client->Blocking;
array<Byte>^tmp = gcnew array<Byte>(1);
client->Blocking = false;
client->Send( tmp, 0, static_cast<SocketFlags>(0) );
Console::WriteLine( L"Connected!" );
catch ( SocketException^ e )
// 10035 == WSAEWOULDBLOCK
if ( e->NativeErrorCode.Equals( 10035 ) )
Console::WriteLine( "Connected from an exception!" );
Console::WriteLine( "Disconnected: {0}!", e->NativeErrorCode );
finally
client->Blocking = blockingState;
Console::WriteLine( "Connected: {0}", client->Connected );
// .Connect throws an exception if unsuccessful
client.Connect(anEndPoint);
// This is how you can determine whether a socket is still connected.
bool blockingState = client.Blocking;
byte [] tmp = new byte[1];
client.Blocking = false;
client.Send(tmp, 0, 0);
Console.WriteLine("Connected!");
catch (SocketException e)
// 10035 == WSAEWOULDBLOCK
if (e.NativeErrorCode.Equals(10035))
Console.WriteLine("Still Connected, but the Send would block");
Console.WriteLine("Disconnected: error code {0}!", e.NativeErrorCode);
finally
client.Blocking = blockingState;
Console.WriteLine("Connected: {0}", client.Connected);
' .Connect throws an exception if unsuccessful
client.Connect(anEndPoint)
' This is how you can determine whether a socket is still connected.
Dim blockingState As Boolean = client.Blocking
Dim tmp(0) As Byte
client.Blocking = False
client.Send(tmp, 0, 0)
Console.WriteLine("Connected!")
Catch e As SocketException
' 10035 == WSAEWOULDBLOCK
If e.NativeErrorCode.Equals(10035) Then
Console.WriteLine("Still Connected, but the Send would block")
Console.WriteLine("Disconnected: error code {0}!", e.NativeErrorCode)
End If
Finally
client.Blocking = blockingState
End Try
Console.WriteLine("Connected: {0}", client.Connected)
End Sub
屬性
Connected
會從最後一個 I/O 作業開始取得 的連接
Socket
狀態。 當傳回
false
時，
Socket
表示從未連接，或已不再連接。
Connected
不是安全線程;當 與另一個執行緒中斷連線時，作業中止後
Socket
可能會傳回
true
。
屬性的值
Connected
會反映線上狀態，如同最近一次的作業一樣。 如果您需要判斷連線的目前狀態，請建立非封鎖、零位元組的 Send 呼叫。 如果呼叫成功傳回或擲回 WAEWOULDBLOCK 錯誤碼， (10035) ，則通訊端仍已連線;否則，通訊端已不再連線。
如果您在 UDP) 通訊端 (使用者資料包通訊協定上呼叫
Connect
，屬性
Connected
一律會傳回
true
;不過，此動作不會變更 UDP 固有的無連線本質。
