近日看了很多SMS.dll模块都是限制使用次数或收费，先求各位大侠发下没有限制的SMS.DLL短信模块
小弟在此谢过！
------解决方案--------------------
嘿嘿,AT指令..
- C# code
namespace ModemImpl { public class Modem { public bool IsOpen { get { return isOpen; } } public Modem(string portName) { this.portName = portName; Regex r1 = new Regex(@"^\+CMTI\:"); Regex r2 = new Regex(@"^\+CMGR\:"); Regex r3 = new Regex(@"^\+RING\:"); ATBeginHandlerMap.Add(r1, OnBeginCMTI); ATBeginHandlerMap.Add(r2, OnBeginCMGR); ATBeginHandlerMap.Add(r3, OnBeginRING); ATHandlerMap.Add(r1, OnCMTI); ATHandlerMap.Add(r2, OnCMGR); ATHandlerMap.Add(r3, OnRING); responseMap.Add(typeof(SendMessageRequest), OnCMGSResponse); } public void Open() { port = new SerialPort(portName); port.Encoding = Encoding.Default; port.ReadTimeout = 30000; port.WriteTimeout = 30000; port.BaudRate = 9600; port.RtsEnable = true; port.Open(); port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); AddRequestToQueue(new SettingReuqest("AT").Execute(port)); Thread.Sleep(50); AddRequestToQueue(new SettingReuqest("ATE0").Execute(port)); AddRequestToQueue(new SettingReuqest("AT+CMGF=1").Execute(port)); AddRequestToQueue(new SettingReuqest("AT+CNMI=2,1").Execute(port)); AddRequestToQueue(new SettingReuqest("AT+CSMP=49,167,0,8").Execute(port)); isOpen = true; } public void Close() { port.DataReceived -= port_DataReceived; port.Close(); isOpen = false; } public void Send(Message arg) { if (arg.Text.Length > 70) { throw new ArgumentOutOfRangeException("短信不能超过70个字符"); } AddRequestToQueue(new SendMessageRequest(arg).Execute(port)); } // ---------------------------------- private void port_DataReceived(object sender, SerialDataReceivedEventArgs e) { string line = string.Empty; try { while (port.BytesToRead > 0) { line = port.ReadLine(); if (!string.IsNullOrEmpty(line) && "\r" != line) { Console.WriteLine(line); receiveBuffer.Add(line); if (!isInterrupt) { if (IsBeginInterrupt(line)) { if (IsEndInterrupt()) { EndInterrupt(); } } else { string c = line.TrimEnd('\r'); if ("OK" == c || "ERROR" == c) { var response = new ModemResponse(receiveBuffer); response.Request = requestQueue.Dequeue(); Type t = response.Request.GetType(); if (responseMap.ContainsKey(t)) { responseMap[t](response); } receiveBuffer.Clear(); } } } else { if (IsEndInterrupt()) { EndInterrupt(); } } } } } catch (Exception ex) { Trace.WriteLine(ex); } } private void EndInterrupt() { interruptHandler(receiveBuffer); beginInterruptHandler = null; interruptHandler = null; receiveBuffer.Clear(); } private bool IsEndInterrupt() { Trace.Assert(beginInterruptHandler != null); bool result = false; if (beginInterruptHandler(receiveBuffer)) { result = true; } return result; } private bool IsBeginInterrupt(string arg) { bool result = false; foreach (var each in ATBeginHandlerMap.Keys) { if (each.IsMatch(arg)) { beginInterruptHandler = ATBeginHandlerMap[each]; interruptHandler = ATHandlerMap[each]; result = true; break; } } return result; } private bool OnBeginCMTI(List<string> content) { return true; } private void OnCMTI(List<string> content) { // +CMTI:"SM",1 Regex pattern = new Regex(@"^\+CMTI:.+,(\d+)"); Match m = pattern.Match(content[0]); index = Convert.ToInt32(m.Groups[1].Value); AddRequestToQueue(new RetrieveMessageReuqest(index).Execute(port)); } private bool OnBeginCMGR(List<string> content) { return (content.Count == 3); } private void OnCMGR(List<string> content) { Regex pattern = new Regex("^\\+CMGR:.+,\"(\\S+)\","); Match m = pattern.Match(content[0]); string address = m.Groups[1].Value; if (address.StartsWith("+86")) { address = address.Substring(3); } string content1 = content[1].TrimEnd('\r'); if (content1.StartsWith("050003")) { content1 = content1.Substring(12); } Message message = new Message(address, MessageHelper.MessageDecode(content1)); message.Raw = content[1].TrimEnd('\r'); message.Flags = MessageFlags.UNREAD; message.CreatedAt = DateTime.Now; DeleteByIndex(index); Receive(message); } private bool OnBeginRING(List<string> content) { return true; } private void OnRING(List<string> content) { } private void OnCMGSResponse(ModemResponse response) { SendResult(response); } private void DeleteByIndex(int index) { port.Write(string.Format("AT+CMGD={0}\r", index)); } private void AddRequestToQueue(ModemMessage arg) { if (arg is ModemRequest) { requestQueue.Enqueue(arg as ModemRequest); } } private List<string> receiveBuffer = new List<string>(); private ATReceivedEventHandler interruptHandler; private ATBeginReceivedEventHandler beginInterruptHandler; private bool isInterrupt { get { return beginInterruptHandler != null; } } private Queue<ModemRequest> requestQueue = new Queue<ModemRequest>(); private Dictionary<Type, ModemResponseHandler> responseMap = new Dictionary<Type, ModemResponseHandler>(); private Dictionary<Regex, ATBeginReceivedEventHandler> ATBeginHandlerMap = new Dictionary<Regex, ATBeginReceivedEventHandler>(); private Dictionary<Regex, ATReceivedEventHandler> ATHandlerMap = new Dictionary<Regex, ATReceivedEventHandler>(); private string portName; private SerialPort port; private int index; private bool isOpen = false; public event MessageReceivedEventHandler Receive; public event MessageSendEventHandler SendResult; } public abstract class ModemMessage { public List<string> Content { get; set; } public virtual ModemMessage Execute(SerialPort port) { return this; } } public class ModemRequest : ModemMessage { } public class ModemResponse : ModemMessage { public ModemRequest Request { get; set; } public ModemResponse(List<string> content) { Content = content; } } public class ModemNotify : ModemMessage { } public class SettingReuqest : ModemRequest { public SettingReuqest(string command) { this.command = command; } public override ModemMessage Execute(SerialPort port) { base.Execute(port); port.Write(command + "\r"); return this; } private string command; } public class SendMessageRequest : ModemRequest { public Message Message { get; set; } public SendMessageRequest(Message message) { Message = message; } public override ModemMessage Execute(SerialPort port) { base.Execute(port); try { port.DiscardInBuffer(); port.Write(string.Format("AT+CMGS={0}\r", Message.Address)); port.DiscardInBuffer(); port.Write(MessageHelper.MessageEncode(Message.Text) + ControlZ + "\r"); Message.Flags = MessageFlags.SENDED; Message.CreatedAt = DateTime.Now; } catch (Exception) { Message.Flags = MessageFlags.SENDFAILED; Message.CreatedAt = DateTime.Now; throw; } return this; } private const char ControlZ = (char)0x1A; } public class RetrieveMessageReuqest : ModemRequest { public RetrieveMessageReuqest(int index) { this.index = index; } public override ModemMessage Execute(SerialPort port) { base.Execute(port); port.Write(string.Format("AT+CMGR={0}\r", index)); return this; } private int index; } public delegate bool ATBeginReceivedEventHandler(List<string> content); public delegate void ATReceivedEventHandler(List<string> content); public delegate void ModemResponseHandler(ModemResponse response); public delegate void MessageReceivedEventHandler(Message arg); public delegate void MessageSendEventHandler(ModemResponse response);}