本文实例讲述了C#推送信息到APNs的方法。分享给大家供大家参考。具体实现方法如下：

class Program{ public static DateTime? Expiration { get; set; } public static readonly DateTime DoNotStore = DateTime.MinValue; private static readonly DateTime UNIX_EPOCH = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc); private static string DeviceToken = "273eeddaef02192cf4ba5b666453b258f2d2a1ad02f549105fd03fea789d809d"; public const int DEVICE_TOKEN_BINARY_SIZE = 32; public const int DEVICE_TOKEN_STRING_SIZE = 64; public const int MAX_PAYLOAD_SIZE = 256; private static X509Certificate certificate; private static X509CertificateCollection certificates; static void Main(string[] args) { string hostIP = "gateway.sandbox.push.apple.com";// int port = 2195; string password = "ankejiaoyu";// string certificatepath = "aps_developer_identity.p12";//bin/debug string p12Filename = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, certificatepath); certificate = new X509Certificate2(System.IO.File.ReadAllBytes(p12Filename), password, X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable); certificates = new X509CertificateCollection(); certificates.Add(certificate); TcpClient apnsClient = new TcpClient(); apnsClient.Connect(hostIP, port); SslStream apnsStream = new SslStream(apnsClient.GetStream(), false, new RemoteCertificateValidationCallback(validateServerCertificate), new LocalCertificateSelectionCallback(selectLocalCertificate)); try { //APNs已不支持SSL 3.0 apnsStream.AuthenticateAsClient(hostIP, certificates, System.Security.Authentication.SslProtocols.Tls, false); } catch (System.Security.Authentication.AuthenticationException ex) { Console.WriteLine("error+"+ex.Message); } if (!apnsStream.IsMutuallyAuthenticated) { Console.WriteLine("error:Ssl Stream Failed to Authenticate！"); } if (!apnsStream.CanWrite) { Console.WriteLine("error:Ssl Stream is not Writable!"); } Byte[] message = ToBytes(); apnsStream.Write(message); } public static byte[] ToBytes() { // Without reading the response which would make any identifier useful, it seems silly to // expose the value in the object model, although that would be easy enough to do. For // now we'll just use zero. int identifier = 0; byte[] identifierBytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(identifier)); // APNS will not store-and-forward a notification with no expiry, so set it one year in the future // if the client does not provide it. int expiryTimeStamp = -1;//过期时间戳 if (Expiration != DoNotStore) { //DateTime concreteExpireDateUtc = (Expiration ?? DateTime.UtcNow.AddMonths(1)).ToUniversalTime(); DateTime concreteExpireDateUtc = (Expiration ?? DateTime.UtcNow.AddSeconds(20)).ToUniversalTime(); TimeSpan epochTimeSpan = concreteExpireDateUtc - UNIX_EPOCH; expiryTimeStamp = (int)epochTimeSpan.TotalSeconds; } byte[] expiry = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(expiryTimeStamp)); byte[] deviceToken = new byte[DeviceToken.Length / 2]; for (int i = 0; i < deviceToken.Length; i++) deviceToken[i] = byte.Parse(DeviceToken.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber); if (deviceToken.Length != DEVICE_TOKEN_BINARY_SIZE) { Console.WriteLine("Device token length error！"); } byte[] deviceTokenSize = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(Convert.ToInt16(deviceToken.Length))); string str = "{\"aps\":{\"alert\":\"这是测试消息！！\",\"badge\":1,\"sound\":\"anke.mp3\"}}"; byte[] payload = Encoding.UTF8.GetBytes(str); byte[] payloadSize = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(Convert.ToInt16(payload.Length))); List<byte[]> notificationParts = new List<byte[]>(); //1 Command notificationParts.Add(new byte[] { 0x01 }); // Enhanced notification format command notificationParts.Add(identifierBytes); notificationParts.Add(expiry); notificationParts.Add(deviceTokenSize); notificationParts.Add(deviceToken); notificationParts.Add(payloadSize); notificationParts.Add(payload); return BuildBufferFrom(notificationParts); } private static byte[] BuildBufferFrom(IList<byte[]> bufferParts) { int bufferSize = 0; for (int i = 0; i < bufferParts.Count; i++) bufferSize += bufferParts[i].Length; byte[] buffer = new byte[bufferSize]; int position = 0; for (int i = 0; i < bufferParts.Count; i++) { byte[] part = bufferParts[i]; Buffer.BlockCopy(bufferParts[i], 0, buffer, position, part.Length); position += part.Length; } return buffer; } private static bool validateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; // Dont care about server's cert } private static X509Certificate selectLocalCertificate(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers) { return certificate; }}

希望本文所述对大家的C#程序设计有所帮助。