我发送短信通过AT与GSM手机的命令。 我想发送大量像成千上万的消息。 我读了由GSM手机,我们可以把每分钟6-8短信。 但是,当我发送消息,然后有人会,有人不会。 我正在从Excel文件中的信息意味着目标号码和消息文本。 你能告诉我,为什么一些短信会,有些不是。 我的代码
SmsFields smsObj = null;
List<SmsFields> smsColl = null;
SerialPort serialport = null;
StringBuilder strbuild = new StringBuilder();
try
{
//Validate the form
if (!Validation()) return;
serialport = new SerialPort();
////Sets the properties of serial port object
serialport.PortName = cboPort.SelectedItem.ToString();
serialport.BaudRate = 9600;
serialport.Parity = Parity.None;
serialport.DataBits = 8;
serialport.StopBits = StopBits.One;
serialport.Handshake = Handshake.RequestToSend;
serialport.DtrEnable = true;
serialport.RtsEnable = true;
//Open the port to send sms
serialport.Open();
//Check if port is opened or not
if (!serialport.IsOpen)
{
MessageBox.Show("Serial port is not opened. Please try with other port");
return;
}
//Create smsFields class's object and fill the data in the generic collection
smsObj = SmsFields.Instance;
smsColl = smsObj.FillData(txtFilePath.Text);
if (smsColl == null)
{
MessageBox.Show("No data found in the excel table");
return;
}
//Gets the single record from SmsFields class and sends the message
foreach (SmsFields sms in smsColl)
{
//checks phone status
serialport.WriteLine("AT" + Environment.NewLine);
//Configures message as SMS (0 for PDU format) and (1 for text format)
serialport.WriteLine("AT+CMGF=1" + Environment.NewLine);
//Sets message center number
serialport.WriteLine("AT+CSCA=\"" + txtServiceNo.Text + "\"" + Environment.NewLine);
//Sets destination number
serialport.WriteLine("AT+CMGS=\"" + sms.DestinationNo + "\"" + Environment.NewLine);
//Specifies message and sends Ctrl+z
serialport.WriteLine(sms.Message + (char)26);
//Displays buffer containing output messages
System.Threading.Thread.Sleep(4000);
}