最終更新:2019-12-09 (月) 18:12:16 (1601d)  

UdpClient.Send
Top / UdpClient.Send

https://docs.microsoft.com/ja-jp/dotnet/api/system.net.sockets.udpclient.send?view=netframework-4.8

内部

↑

オーバーロード

↑

Send(Byte[], Int32)

  • public int Send (byte[] dgram, int bytes);
  • Send メソッド の引数に接続先を指定しない場合、事前に UdpClient.Connect メソッド を呼ぶ必要があります 
    public int Send(byte[] dgram, int bytes) {
    //
    // parameter validation
    //
    if (m_CleanedUp){
        throw new ObjectDisposedException(this.GetType().FullName);
    }
    if (dgram==null){
        throw new ArgumentNullException("dgram");
    }
    if (!m_Active) {
        //
        // only allowed on connected socket
        //
        throw new InvalidOperationException(SR.GetString(SR.net_notconnected));
    }

    return Client.Send(dgram, 0, bytes, SocketFlags.None);
}
  • Socket.Send
↑

Send(Byte[], Int32, String, Int32)

  • public int Send (byte[] dgram, int bytes, string hostname, int port); 
    public int Send(byte[] dgram, int bytes, string hostname, int port) {
    //
    // parameter validation
    //
    if (m_CleanedUp){
        throw new ObjectDisposedException(this.GetType().FullName);
    }
    if (dgram==null){
        throw new ArgumentNullException("dgram");
    }
    if (m_Active && ((hostname != null) || (port != 0))) {
        //
        // Do not allow sending packets to arbitrary host when connected
        //
        throw new InvalidOperationException(SR.GetString(SR.net_udpconnected));
    }

    if (hostname==null || port==0) {
        return Client.Send(dgram, 0, bytes, SocketFlags.None);
    }

    IPAddress[] addresses = Dns.GetHostAddresses(hostname);

    int i=0;
    for (;i<addresses.Length && addresses[i].AddressFamily != m_Family; i++);

    if (addresses.Length == 0 || i == addresses.Length) {
        throw new ArgumentException(SR.GetString(SR.net_invalidAddressList), "hostname");
    }

    CheckForBroadcast(addresses[i]);
    IPEndPoint ipEndPoint = new IPEndPoint(addresses[i], port);
    return Client.SendTo(dgram, 0, bytes, SocketFlags.None, ipEndPoint);
}
  • Socket.SendTo



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