我尝试使用 C# 语言使用 .net 紧凑框架在 Windows CE 上开发 FTP 程序。但是在过去的两天里，我没有得到答案
我做了以下
- 使用RAS Dial连接GPRS 2.导入
wininet.dllFTP连接功能
但是InternetConnect 函数总是抛出错误代码12031
好的，我可以分享更多信息吗？请你看看这个
实际上我们正在使用另一家公司的 MDT 设备。他们提供了一个 dll，它可以完成 OpenGPRS 的一些初始任务，根据他们的手册，我们必须延迟大约 30 秒。
之后我们要发出一些AT指令，最后就可以使用RAS dial api进行连接了。
那部分如下
public static bool TestRAS()
{
int hModem;
COMMTIMEOUTS tm = new COMMTIMEOUTS();
DCB dcb = new DCB();
Console.WriteLine("Begin test RAS");
IO_OpenGprsPower(false);
System.Threading.Thread.Sleep(1000);
IO_OpenGprsPower(true);
//open serial port
Console.WriteLine("Open gprs port(COM7:) ");
hModem = CreateFile("COM7:", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
if (hModem == -1)
{
Console.WriteLine("Error, End test RAS ");
return false;
}
//set time out
tm.ReadIntervalTimeout = 10;
tm.ReadTotalTimeoutConstant = 10;
tm.ReadTotalTimeoutMultiplier = 0;
tm.WriteTotalTimeoutConstant = 5000;
tm.WriteTotalTimeoutMultiplier = 0;
if (!SetCommTimeouts(hModem, ref tm))
{
CloseHandle(hModem);
Console.WriteLine("Error..End test RAS");
return false;
}
//set state
if (!GetCommState(hModem, ref dcb))
{
CloseHandle(hModem);
Console.WriteLine("Error..End test RAS");
return false;
}
dcb.BaudRate = 115200;
dcb.StopBits = 0;
dcb.Parity = 0;
dcb.ByteSize = 8;
if (!SetCommState(hModem, ref dcb))
{
CloseHandle(hModem);
Console.WriteLine("Error..End test RAS");
return false;
}
Console.WriteLine("OK..");
//wait gprs module to register to network
Console.WriteLine("Wait gprs module start ");
for (int i = 30; i >= 0; i--)
{
Console.WriteLine("Wait.." + i.ToString());
System.Threading.Thread.Sleep(1000);
}
int iRet = 0;
byte[] objBytes = new byte[1024];
string strData;
byte[] objAtCmd;
//config context
Console.WriteLine("Config gprs context");
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT\r\n");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(1000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT\r\n");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(1000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
strData = System.Text.Encoding.ASCII.GetString(objBytes, 0, iRet);
if (strData.IndexOf("OK") < 0)
{
CloseHandle(hModem);
Console.WriteLine("AT error.. End test RAS");
return false;
}
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT+CFUN=1\r\n");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(1000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
strData = System.Text.Encoding.ASCII.GetString(objBytes, 0, iRet);
if (strData.IndexOf("OK") < 0)
{
CloseHandle(hModem);
Console.WriteLine("AT+CFUN=1 error.. End test RAS");
return false;
}
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT+COPS?\r\n");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(1000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
strData = System.Text.Encoding.ASCII.GetString(objBytes, 0, iRet);
if (strData.IndexOf("OK") < 0)
{
CloseHandle(hModem);
Console.WriteLine("AT+COPS? error.. End test RAS");
return false;
}
//you can replace isp.cingular with your local APN
// objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT+CGDCONT=1,\"IP\",\"bsnlnet\"\r\n");
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT+CGDCONT=1,\"IP\",\"internet\"\r\n");
Console.WriteLine("AT+CGDCONT=1,\"IP\",\"internet\"\r\n");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(1000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
strData = System.Text.Encoding.ASCII.GetString(objBytes, 0, iRet);
Console.WriteLine(strData);
if (strData.IndexOf("OK") < 0)
{
CloseHandle(hModem);
Console.WriteLine("AT+CGDCONT=1 error..End test RAS");
return false;
}
objAtCmd = System.Text.Encoding.ASCII.GetBytes("AT+CGATT=1\r\n");
Console.WriteLine("AT+CGATT=1");
WriteFile(hModem, objAtCmd, objAtCmd.Length, ref iRet, 0);
System.Threading.Thread.Sleep(30000);
ReadFile(hModem, objBytes, 1024, ref iRet, 0);
strData = System.Text.Encoding.ASCII.GetString(objBytes, 0, iRet);
Console.WriteLine(strData);
if (strData.IndexOf("OK") < 0)
{
CloseHandle(hModem);
Console.WriteLine("AT+CGATT=1 error.. End test RAS");
return false;
}
CloseHandle(hModem);
//begin set dial parameters
Console.WriteLine("Begin dial.Please wait..");
int iSize = 2 + RAS_MaxEntryName + 1 + RAS_MaxPhoneNumber + 1 +
RAS_MaxCallbackNumber + 1 + UNLEN + 1 + PWLEN + 1 + DNLEN + 1;
char[] paras = new char[iSize];
for (int i = 0; i < iSize; i++)
paras[i] = (char)0;
iSize = iSize * 2;
//RASDIALPARAMS.dwSize
paras[0] = (char)(iSize & 0xFFFF);
paras[1] = (char)((iSize >> 16) & 0xFFFF);
//RASDIALPARAMS.szEntryName
paras[2] = 'G';
paras[3] = 'p';
paras[4] = 'r';
paras[5] = 's';
paras[6] = 'M';
paras[7] = 'o';
paras[8] = 'd';
paras[9] = 'e';
paras[10] = 'm';
string username = "";
string password = "";
char[] charUserName;
charUserName = username.ToCharArray();
char[] charPassword;
charPassword = password.ToCharArray();
char[] charPhone;
charPhone = "*99***1#".ToCharArray();
for (int i = 0; i < charPhone.Length; i++)
{
paras[22 + i] = charPhone[i];
}
for (int i = 0; i < username.Length; i++)
{
paras[200 + i] = charUserName[i];
}
for (int i = 0; i < password.Length; i++)
{
paras[457 + i] = charPassword[i];
}
//Start to dial
IO_DisableRASDialUserNamePasswordVerifyDialog();
int hRasConn = 0;
if (RasDial(0, null, paras, 0, 0, ref hRasConn) != 0)
{
Console.WriteLine("Dial error");
if (hRasConn != 0)
RasHangUp(hRasConn);
Console.WriteLine("End test RAS");
return false;
}
Console.WriteLine("Dial ok");
//get ip address
Console.WriteLine("Get IP addr ");
iSize = 2 + 2 + RAS_MaxIpAddress + 1;
char[] rasIp = new char[iSize];
for (int i = 0; i < iSize; i++)
paras[i] = (char)0;
iSize = iSize * 2;
//RASPPPIP.dwSize
rasIp[0] = (char)(iSize & 0xFFFF);
rasIp[1] = (char)((iSize >> 16) & 0xFFFF);
iRet = iSize;
if (RasGetProjectionInfo(hRasConn, 0x8021, rasIp, ref iRet) != 0)
{
Console.WriteLine("Error");
RasHangUp(hRasConn);
Console.WriteLine("End test RAS");
return false;
}
for (int i = 0; i < RAS_MaxIpAddress + 1; i++)
{
if (rasIp[2 + 2 + i] == (char)0)
break;
Console.WriteLine(rasIp[2 + 2 + i].ToString());
}
Console.WriteLine("End RAS Test");
//try
//{
// Process.Start("IExplore.exe", "@http://www.google.co.in");
//}
//catch (Exception ex)
//{
// Console.WriteLine(ex.Message);
//}
// RasHangUp(hRasConn);
return true;
}
对于 FTP 部分，我使用 wininet.dll 函数开发了一个库
OPen FTP的功能如下：
public void Open()
{
if (String.IsNullOrEmpty(_host)) throw new ArgumentNullException("Host");
_hInternet = WININET.InternetOpen(
"FTPLibTest",
WININET.INTERNET_OPEN_TYPE_DIRECT,
null,
null,
0);
if (_hInternet == IntPtr.Zero)
{
Error();
}
uint uintFlags = 0;
WININET.InternetGetConnectedState(ref uintFlags, 0);
if (uintFlags > 0)
{
Console.WriteLine("Internet Connected");
}
}
FTP登录功能：
public void Login(string username, string password)
{
if (username == null) throw new ArgumentNullException("username");
if (password == null) throw new ArgumentNullException("password");
{
}
_hConnect = WININET.InternetConnect(_hInternet,
_host,
_port,
username,
password,
WININET.INTERNET_SERVICE_FTP,
134217728,
IntPtr.Zero);
if (_hConnect == IntPtr.Zero)
{
Error();
}
}
从这个函数我得到了 12031 的错误
WININET 是我放置所有 dllimport 的类