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TcpStatistics.FailedConnectionAttempts 屬性

  • 參考

定義

命名空間:
System.Net.NetworkInformation
組件:
System.Net.NetworkInformation.dll
組件:
System.dll
組件:
netstandard.dll

取得已失敗的傳輸控制通訊協定 (TCP) 連線嘗試數目。

public:
 abstract property long FailedConnectionAttempts { long get(); };
public abstract long FailedConnectionAttempts { get; }
member this.FailedConnectionAttempts : int64
Public MustOverride ReadOnly Property FailedConnectionAttempts As Long

屬性值

Int64

Int64 值，指定已失敗的 TCP 連線嘗試總數。

範例

下列程式代碼範例會顯示連線資訊。

void ShowTcpConnectionStatistics()
{
   IPGlobalProperties ^ properties = IPGlobalProperties::GetIPGlobalProperties();
   TcpStatistics ^ tcpstat = properties->GetTcpIPv4Statistics();
   Console::WriteLine( "  Connection Data:" );
   Console::WriteLine( "      Current  ............................ : {0}", 
       tcpstat->CurrentConnections );
   Console::WriteLine( "      Cumulative .......................... : {0}", 
       tcpstat->CumulativeConnections );
   Console::WriteLine( "      Initiated ........................... : {0}", 
       tcpstat->ConnectionsInitiated );
   Console::WriteLine( "      Accepted ............................ : {0}", 
       tcpstat->ConnectionsAccepted );
   Console::WriteLine( "      Failed Attempts ..................... : {0}", 
       tcpstat->FailedConnectionAttempts );
   Console::WriteLine( "      Reset ............................... : {0}", 
       tcpstat->ResetConnections );
   Console::WriteLine( "      Errors .............................. : {0}", 
       tcpstat->ErrorsReceived );
}

public static void ShowTcpConnectionStatistics()
{
    IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
    TcpStatistics tcpstat = properties.GetTcpIPv4Statistics();

    Console.WriteLine("  Connection Data:");
    Console.WriteLine("      Current  ............................ : {0}",
        tcpstat.CurrentConnections);
    Console.WriteLine("      Cumulative .......................... : {0}",
        tcpstat.CumulativeConnections);
    Console.WriteLine("      Initiated ........................... : {0}",
        tcpstat.ConnectionsInitiated);
    Console.WriteLine("      Accepted ............................ : {0}",
        tcpstat.ConnectionsAccepted);
    Console.WriteLine("      Failed Attempts ..................... : {0}",
        tcpstat.FailedConnectionAttempts);
    Console.WriteLine("      Reset ............................... : {0}",
        tcpstat.ResetConnections);
    Console.WriteLine("      Errors .............................. : {0}",
        tcpstat.ErrorsReceived);
    Console.WriteLine();
}

Public Shared Sub ShowTcpConnectionStatistics() 
    Dim properties As IPGlobalProperties = IPGlobalProperties.GetIPGlobalProperties()
    Dim tcpstat As TcpStatistics = properties.GetTcpIPv4Statistics()
    
    Console.WriteLine("  Connection Data:")
    Console.WriteLine("      Current  ............................ : {0}", tcpstat.CurrentConnections)
    Console.WriteLine("      Cumulative .......................... : {0}", tcpstat.CumulativeConnections)
    Console.WriteLine("      Initiated ........................... : {0}", tcpstat.ConnectionsInitiated)
    Console.WriteLine("      Accepted ............................ : {0}", tcpstat.ConnectionsAccepted)
    Console.WriteLine("      Failed Attempts ..................... : {0}", tcpstat.FailedConnectionAttempts)
    Console.WriteLine("      Reset ............................... : {0}", tcpstat.ResetConnections)
    Console.WriteLine("      Errors .............................. : {0}", tcpstat.ErrorsReceived)

End Sub

備註

IETF RFC 2012 正式將此值定義為「TCP 連線從 SYN-SENT 狀態或 SYN-RCVD 狀態直接轉換至 CLOSED 狀態的次數，加上 TCP 連線從 SYN-RCVD 狀態直接轉換至 LISTEN 狀態的次數。」

適用於