如何在c#中检索发送USSD命令的响应结果
本文关键字:命令 USSD 响应 结果 检索 | 更新日期: 2023-09-27 18:29:36
我使用以下代码发送USSD命令:
SerialPort port = new SerialPort();
port.BaudRate = 921600;
port.PortName = "COM16";
port.Parity = Parity.None;
port.DataBits = 8;
port.StopBits = StopBits.One;
port.ReadTimeout = 3000;
port.WriteTimeout = 3000;
port.DataReceived += port_DataReceived;
port.Open();
port.Write("AT+CUSD=1,'"*140*1#'"" + "'r'n");
void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
SerialPort spL = (SerialPort)sender;
byte[] buf = new byte[spL.BytesToRead];
spL.Read(buf, 0, buf.Length);
foreach (Byte b in buf)
{
message += b.ToString();
}
var result = Encoding.ASCII.GetString(buf);//just return OK
}
为什么只在结果中检索OK?
在这种情况下,我想检索我的余额,我必须收到这样的答案:"您的余额是100$…",但只检索:"AT+CUSD=1,''"*140*1#''"''r''n''r''n",但当我通过调制解调器自己的应用程序发送此命令时,从操作员处检索正确的响应,这意味着我的发送命令是可以的,但该应用程序接收到所有答案,但我收到一半。
实际上我更新了代码,现在它可以与GSMCOMM库一起使用。我可以检查一下我的平衡,看看反应。我只是在接收响应时将响应附加到一个字符串变量中。
public string SendUssdRequest(string request)
{
log.DebugFormat("Sending USSD Request {0}", request);
string result = "";
try
{
IProtocol protocol = comm.GetProtocol();
string gottenString = protocol.ExecAndReceiveMultiple("AT+CUSD=1," + request + ",15");
result = gottenString;
int i = 0;
if (!gottenString.Contains("'r'n+CUSD: 2"))
{
bool receiving = false;
do
{
receiving = protocol.Receive(out gottenString);
result += gottenString;
++i;
} while (receiving);
}
result = result.Replace("'r'n", "");
result = result.Replace("+CUSD: 2,", "");
result = result.Replace(",15", "");
log.DebugFormat("{1} - USSD Response is: {0}", result,SenderNumber);
return result;
}
catch(Exception ex)
{
log.Error(ex);
}
finally
{
comm.ReleaseProtocol();
}
return "";
}
port.Write("AT+CUSD=1,'"*140*1#'"" + ",15'r");