关于SerialPort 的 ReadTimeout WriteTimeout
我写了一个短信猫发送程序，下边是主要的发送模块。 用的是西门子TC35。
我想问一下：
1. 程序关闭的时候，串口资源怎么释放，我现在只是调用 SerialPort.close()，是否要调用 Dispose()
2. ReadTimeout WriteTimeout 是否需要设置？ 在程序运行中有什么用？
private bool SmsToModem(string userMsg, string phoneNumber)
{
bool isSuccess = false;
try
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
while (!InitModem())
{
Thread.Sleep(1000);
}
string msgCoded = SmsSerial.GetSendMsg(null, phoneNumber, userMsg); //pdu码
string back_AtCmgs = string.Empty;
string back_Pdu = string.Empty;
string back_Final = string.Empty;//写1a后的反馈
string test = string.Empty;
Byte[] bytesAtBreak;
//写AT命令-长度
sp.DiscardInBuffer();
sw.Restart();
sp.WriteLine("AT+CMGS=" + (msgCoded.Length / 2 - 1).ToString() + "\r\n");
while ( !(back_AtCmgs.Contains(">") || back_AtCmgs.Contains(Constants.Sms_BackERROR)) )
{
Thread.Sleep(30);
back_AtCmgs = back_AtCmgs + sp.ReadExisting();
//超时处理
if (sw.ElapsedMilliseconds/1000 > Constants.Sms_TimeOutSendAT)
{
bytesAtBreak = new Byte[1];
bytesAtBreak[0] = 0X1b;
sp.Write(bytesAtBreak, 0, 1);
Thread.Sleep(300);
isSuccess = false;
return isSuccess;
}
}
sw.Stop();
if (back_AtCmgs.Contains(Constants.Sms_BackERROR))
{
isSuccess = false;
return isSuccess;
}
//写AT命令-pdu
sp.DiscardInBuffer();
sw.Restart();
sp.Write(msgCoded);
while (!back_Pdu.Contains(msgCoded))
{
Thread.Sleep(30);
back_Pdu = back_Pdu + sp.ReadExisting();
//超时处理
if (sw.ElapsedMilliseconds / 1000 > Constants.Sms_TimeOutSendAT)
{
bytesAtBreak = new Byte[1];
bytesAtBreak[0] = 0X1b;
sp.Write(bytesAtBreak, 0, 1);
Thread.Sleep(300);
isSuccess = false;
return isSuccess;
}
}
sw.Stop();
//写AT命令-1a
sp.DiscardInBuffer();
sw.Restart();
Byte[] bytes = new Byte[1];
bytes[0] = 0X1a;
sp.Write(bytes, 0, 1);
while (!(back_Final.Contains("OK") || back_Final.Contains(Constants.Sms_BackERROR)))
{
Thread.Sleep(200);
back_Final = back_Final + sp.ReadExisting();
//超时处理
if (sw.ElapsedMilliseconds / 1000 > Constants.Sms_TimeOutSendAT)
{
bytesAtBreak = new Byte[1];
bytesAtBreak[0] = 0X1b;
sp.Write(bytesAtBreak, 0, 1);
Thread.Sleep(300);
isSuccess = false;
return isSuccess;
}
}
sw.Stop();
if (back_Final.Contains("+CMGS")) //如果没有+CMGS，都没有发送成功. 包括只包含 "OK" "ERROR"
{
isSuccess = true;
}
}
catch
{
}
return isSuccess;
}
