最終更新:2019-12-09 (月) 18:12:16 (6d)  

UdpClient.Send はてなブックマークを見る
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