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Enumerating MS SQL Server instances in different ways
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| using System; | |
| using System.Collections.Generic; | |
| using System.Data; | |
| using System.Linq; | |
| using System.Net; | |
| using System.Net.Sockets; | |
| using System.Text; | |
| using System.Text.RegularExpressions; | |
| using Microsoft.SqlServer.Management.Smo; | |
| namespace EnumSqlServers | |
| { | |
| internal class Program | |
| { | |
| private static void Main() | |
| { | |
| try | |
| { | |
| // 1. Try library method | |
| var dataTable = SmoApplication.EnumAvailableSqlServers(false); | |
| if (dataTable.Rows.Count > 0) | |
| { | |
| foreach (DataRow row in dataTable.Rows) | |
| { | |
| Console.WriteLine("{0}", row["Name"]); | |
| } | |
| } | |
| // 2. Using sockets | |
| var socket = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp) | |
| { | |
| EnableBroadcast = true, | |
| ReceiveTimeout = 1000, | |
| DualMode = true | |
| }; | |
| var bytes = new List<byte>(4096); | |
| try | |
| { | |
| var ipv4ep = new IPEndPoint(IPAddress.Broadcast, 1434); | |
| var ipv6ep = new IPEndPoint(IPAddress.Parse("ff02::1"), 1434); | |
| byte[] msg = {0x02}; | |
| socket.SendTo(msg, ipv4ep); | |
| socket.SendTo(msg, ipv6ep); | |
| int cnt = 0; | |
| byte[] byteBuffer = new byte[256]; | |
| do | |
| { | |
| cnt = socket.Receive(byteBuffer); | |
| bytes.AddRange(byteBuffer.Take(cnt)); | |
| } while (cnt != 0); | |
| } | |
| catch (SocketException sex) | |
| { | |
| const int WSAETIMEDOUT = 10060; // Connection timed out. | |
| const int WSAEHOSTUNREACH = 10065; // No route to host. | |
| if (sex.ErrorCode == WSAETIMEDOUT || sex.ErrorCode == WSAEHOSTUNREACH) | |
| { | |
| } | |
| else | |
| { | |
| throw; | |
| } | |
| } | |
| finally | |
| { | |
| socket.Close(); | |
| } | |
| string text = Encoding.ASCII.GetString(bytes.ToArray()); | |
| var servers = text.Split(new[] {";;"}, StringSplitOptions.RemoveEmptyEntries).Select(s => s.Substring(s.IndexOf("ServerName", StringComparison.Ordinal))); | |
| var regex = new Regex(@"^ServerName;(?<server>\w+);InstanceName;(?<instance>\w+);.*", RegexOptions.Compiled); | |
| Console.WriteLine(); | |
| foreach (var server in servers) | |
| { | |
| // parse it with regex | |
| var match = regex.Match(server); | |
| Console.WriteLine("{0}\\{1}", match.Groups["server"], match.Groups["instance"]); | |
| } | |
| } | |
| catch (Exception ex) | |
| { | |
| Console.WriteLine(ex.Message); | |
| } | |
| } | |
| } | |
| } |
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