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How to use android phone for SMS Sending app in C#?

I am trying to develop a C# application that will be able to send SMS only through GSM Modem. When we connect a GSM Modem to our laptop/PC then we have to check the Port of that modem from Device manager > Modem > Port. But in this case, I want to connect my android phone as a GSM Modem with my laptop and trying to use the port number of my connected mobile phone but it is not connecting as a modem. Please help me if you have any idea or any possibility to connect the android phone as a GSM Modem to laptop. Here is my mode.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using TextmagicRest;
using TextmagicRest.Model;
using System.Net;
using System.Collections.Specialized;
using System.IO;
using System.IO.Ports;
using System.Threading;
namespace SMS_Sending_App_2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
SerialPort sp = new SerialPort();
sp.PortName = textBox3.Text;
sp.Open();
sp.WriteLine("AT" + Environment.NewLine);
Thread.Sleep(100);
sp.WriteLine("AT+CMGF=1" + Environment.NewLine);
Thread.Sleep(100);
sp.WriteLine("AT+CSCS=\"GSM\"" + Environment.NewLine);
Thread.Sleep(100);
sp.WriteLine("AT+CMGS=\"" + textBox1.Text + "\"" + Environment.NewLine);
Thread.Sleep(100);
sp.Write(new byte[] { 26 }, 0, 1);
Thread.Sleep(100);
var response = sp.ReadExisting();
if (response.Contains("ERROR"))
{
MessageBox.Show("SMS failed!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
MessageBox.Show("SMS Sent!!!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
sp.Close();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void textBox3_TextChanged(object sender, EventArgs e)
{
}
}
}

Is there a reason for not using a modem? I've seen info that ppl are using their phones but I don't know how they do it. It would be a big risk if the phone offered the modem interface just by connecting to the PC.
For better modem communication look at this project : SMSTerminal

IRC Bot GUI crash?

Ok so, The bot connects just fine, but when I create the bot, the form crashes. The bot stays connected but also the !about commands doesnt work. If i use this same exact code with a console application everything works fine. The problem is just the UI form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Net.Sockets;
namespace cIRCBot
{
public partial class bSetup : Form
{
public bSetup()
{
InitializeComponent();
}
private void createbotbtn_Click(object sender, EventArgs e)
{
string buf, nick, owner, server, chan;
int port;
TcpClient sock = new TcpClient();
TextReader input;
TextWriter output;
//Get nick, owner, server, port, and channel from user
nick = botnick.Text;
owner = botname.Text;
server = servername.Text;
bool isNumber = int.TryParse(portnum.Text, out port);
chan = channelname.Text;
if (isNumber == false)
{
MessageBox.Show("Failed to connect. Make sure the server address and port number are correct.", "Connection Failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
//Connect to irc server and get input and output text streams from TcpClient.
sock.Connect(server, port);
if (!sock.Connected)
{
//Console.WriteLine("Failed to connect!");
return;
}
else
{
this.Close();
input = new StreamReader(sock.GetStream());
output = new StreamWriter(sock.GetStream());
//Starting USER and NICK login commands
output.Write(
"USER " + nick + " 0 * :" + owner + "\r\n" +
"NICK " + nick + "\r\n"
);
output.Flush();
//Process each line received from irc server
for (buf = input.ReadLine(); ; buf = input.ReadLine())
{
//Display received irc message
//Console.WriteLine(buf);
//Send pong reply to any ping messages
if (buf.StartsWith("PING ")) { output.Write(buf.Replace("PING", "PONG") + "\r\n"); output.Flush(); }
if (buf[0] != ':') continue;
/* IRC commands come in one of these formats:
* :NICK!USER#HOST COMMAND ARGS ... :DATA\r\n
* :SERVER COMAND ARGS ... :DATA\r\n
*/
//After server sends 001 command, we can set mode to bot and join a channel
if (buf.Split(' ')[1] == "001")
{
output.Write("MODE " + nick + " +B\r\n" + "JOIN " + chan + "\r\n");
output.Flush();
if (buf.Contains("!about"))
{
output.WriteLine("PRIVMSG {0} :" + "I'm a shitty little bot coded by " + botname, channelname);
output.Flush();
}
}
}
}
}
}
}
This is the Main window, I have the other form which you use to setup
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace cIRCBot
{
public partial class mWin : Form
{
public mWin()
{
InitializeComponent();
}
private void newBotToolStripMenuItem_Click(object sender, EventArgs e)
{
bSetup bSetup = new bSetup();
bSetup.Show();
}
private void quitToolStripMenuItem1_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
}
This is the setup window

I suspect that what causes the problem is the fact that You're doing this.Close() and it gets disposed. After calling Close() You go into for() and try to operate on possibly disposed resources.

C# Program stops responding after second WebClient.DownloadString()

I am working on a program for proof of concept that does a webrequest using WebClient.DownloadString("http://website/members/login.php?user=" + textBox1.Text + "&pass=" + textBox2.Text);
to get the boolean value of wether or not the user is a valid login and then if it is it gives a success notification if it isn't ten it gives a fail notification.
The problem is when i press the button to try and login the first time it works fine but when i press it again the second tine the program freezes and gets stuck at the Webclient.download string.
If anyone can spot and tell me whats wrong that would be great. I am providing the code below:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Text;
using System.Net;
using System.IO;
using System.Diagnostics;
using System.Net;
using System.Collections;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public static WebClient webclient = new WebClient();
HttpWebResponse wResp;
WebRequest wReq;
bool isConnected = false;
private String Session = "";
public Form1()
{
InitializeComponent();
}
public Boolean checkUser(String username, String password)
{
String login = `webclient.DownloadString("http://connorbp.info/members/auth.php?user=" + textBox1.Text + "&pass=" + textBox2.Text);`
Boolean bLogin = Boolean.Parse(login);
if (bLogin)
{
Session = username + "-" + password;
}
return bLogin;
}
public int CanConnect(string dUrl)
{
wReq = WebRequest.Create(dUrl);
int cnt = Connect();
return cnt;
}
private int Connect()
{
try
{
wResp = (HttpWebResponse)wReq.GetResponse();
isConnected = true;
return 1;
}
catch (Exception)
{
return 0;
}
}
private void button1_Click(object sender, EventArgs e)
{
int init = CanConnect("http://connorbp.info/members/auth.php");
if (init == 0)
{
notifyIcon1.ShowBalloonTip(200, "CBP Login", "Failed to connect to server! Try again later.", ToolTipIcon.Error);
}
else
{
if(checkUser(textBox1.Text, textBox2.Text))
{
notifyIcon1.ShowBalloonTip(20, "CBP Login", "Logged In!", ToolTipIcon.Info);
}
else
{
notifyIcon1.ShowBalloonTip(20, "CBP Login", "Invalid Username/Password!", ToolTipIcon.Error);
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
this.MaximizeBox = false;
notifyIcon1.ShowBalloonTip(20, "CBP Login", "for more cool things go to http://connorbp.info", ToolTipIcon.Info);
}
}
}

You are not closing the response.
The second call is trying to open something that is already open, therefore it hangs.

Is it bad Ju-ju that the port is still being listened to after my app shuts down?

My app listens on a certain port for socket messages. I can see that it is LISTENING via "netstat -a" at the command line.
When I shut the app down, the machine is still listening on that port when I re-run "netstat -a"
Is this a problem?
It seems like maybe it is, as when I subsequently start the app again, it crashes ignominiously.
How can I cause the listening to cease?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Diagnostics;
namespace testSocketSendAndReceive_Nutshell
{
public partial class Form1 : Form
{
string sJerrysIPAddr = "10.24.93.110";
string sMyIPAddr = "10.24.93.128";
string sThisAppFileName = string.Empty;
bool bThisInstanceFunctionsAsServer = false;
internal static Form1 MainSocketPairForm = null;
public Form1()
{
InitializeComponent();
MainSocketPairForm = this;
}
private void Form1_Load(object sender, EventArgs e)
{
sThisAppFileName = System.Diagnostics.Process.GetCurrentProcess().ProcessName; // This provides just the app name, appending ".vshost" but NOT ".exe" (testSocketSendAndReceive_Nutshell.vshost)
lblFileName.Text = sThisAppFileName;
// Client and Server code are here combined in one app; however, we want each instance to run as
// just one or the other, so (the .exe functioning as a Server should be renamed with the subString
// "Server" somewhere in the filename):
bThisInstanceFunctionsAsServer = sThisAppFileName.Contains("Server");
if (bThisInstanceFunctionsAsServer)
{
new Thread(Server).Start(); // Run server method concurrently.
Thread.Sleep(500); // Give server time to start.
}
btnSendMsg.Visible = !bThisInstanceFunctionsAsServer;
textBox1.Visible = !bThisInstanceFunctionsAsServer;
}
static void Client()
{
using (TcpClient client = new TcpClient(Form1.MainSocketPairForm.sJerrysIPAddr, 51111)) // err here second time around
using (NetworkStream n = client.GetStream())
{
BinaryWriter w = new BinaryWriter(n);
w.Write(Form1.MainSocketPairForm.textBox1.Text.ToString());
w.Flush();
Form1.MainSocketPairForm.label1.Text = new BinaryReader(n).ReadString();
}
}
static void Server()
{
TcpListener listener = new TcpListener(IPAddress.Any, 51111);
listener.Start();
var shouldExit = false;
while (!shouldExit)
using (TcpClient c = listener.AcceptTcpClient())
{
using (NetworkStream n = c.GetStream())
{
string msg = new BinaryReader(n).ReadString();
if (msg == "exit")
// Client told us to exit...
shouldExit = true;
BinaryWriter w = new BinaryWriter(n);
w.Write(msg + " back atcha!");
w.Flush(); // Must call Flush because we're not disposing the writer.
}
}
}
private void button1_Click(object sender, EventArgs e)
{
Client();
}
private void button2_Click(object sender, EventArgs e)
{
Close();
}
}
}

Your application is probably not actually exiting (check task manager "Processes" tab for your .exe).
You are probably trying to close the application by just closing the command window. Because your Server thread is not a background thread, it will just keep running. Try this guy in Form_Load:
if (bThisInstanceFunctionsAsServer)
{
var serverThread = new Thread(Server);
serverThread.IsBackground = true; // Make sure the server thread doesn't keep the app running in the background
serverThread.Start(); // Run server method concurrently.
Thread.Sleep(500); // Give server time to start.
}

when i running the below code iam getting handle is invalid it takes a string and pass it to remote batch file

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Security;
namespace SampleProject
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
String input = textBox1.Text;
try
{
Process ps = new Process();
ps.StartInfo.FileName = #"\\199.63.55.163\d$\hello.bat";
ps.StartInfo.Arguments = input;
ps.StartInfo.CreateNoWindow = false;
String domain = ps.StartInfo.Domain;
ps.StartInfo.RedirectStandardOutput = true;
ps.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
ps.StartInfo.WorkingDirectory = #"d:\praveen";
ps.StartInfo.UserName = "Raj";
ps.StartInfo.Domain = "domain";
ps.StartInfo.Password = Encrypt("Hello123");
ps.StartInfo.UseShellExecute = false;
ps.Start();
ps.WaitForExit();
MessageBox.Show(ps.StandardOutput.ReadToEnd());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void label1_Click(object sender, EventArgs e)
{
}
public static SecureString Encrypt(String pwd)
{
SecureString ss = new SecureString();
for (int i = 0; i < pwd.Length; i++)
{
ss.AppendChar(pwd[i]);
}
return ss;
}
}
}

It's a shot in the dark, but I think that you can't read the processes standard output once it has exited.
Also you have to redirect it - take a look at this documentation: http://msdn.microsoft.com/en-us/library/system.diagnostics.process.standardoutput.aspx

Duplicate of .NET Process Start Process Error using credentials (The handle is invalid) ? You need to assign RedirectStandardInput, RedirectStandardOutput, RedirectStandardError