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Why does ap.Connect(authrequest) return a null value?

I am having a problem with my code where i run into an error when i try to click the join button. It says the ap.Connect(authrequest) is returning a null value so it cannot return a bool value. I am doing this in visual studio in a .net forms i think.
Thanks for you help.
Ps i am a student
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 SimpleWifi;
namespace desk_flat
{
public partial class formConnect : Form
{
private static Wifi wifi;
public formConnect()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
wifi = new Wifi();
List<AccessPoint> aps = wifi.GetAccessPoints();
foreach (AccessPoint ap in aps)
{
ListViewItem listobj = new ListViewItem(ap.Name);
listobj.SubItems.Add(ap.SignalStrength + "'''");
listobj.Tag = ap;
lstWifi.Items.Add(listobj);
}
}
private bool ConnectWifi(AccessPoint ap, string password)
{
AuthRequest authrequest = new AuthRequest(ap);
authrequest.Password = password;
return ap.Connect(authrequest);
}
private void btnJoin_Click(object sender, EventArgs e)
{
if (lstWifi.Items.Count > 0 && txtbPassword.Text.Length > 0)
{
ListViewItem selectedItem = lstWifi.SelectedItems[0];
AccessPoint ap = (AccessPoint)selectedItem.Tag;
if (ConnectWifi(ap, txtbPassword.Text))
{
lblStatus.Text = "You have connected to " + ap.Name;
}
else
{
lblStatus.Text = "Connection has failed";
}
}
else
{
lblStatus.Text = "Enter a password or select a network";
}
}
}
}

Entering data into Excel worksheets in an add in (C#)

I'm creating an add in for Microsoft Excel that includes a ribbon tab. On this tab is a button with the following code:
public void setAccounts()
{
foreach (Excel.Worksheet displayWorksheet in Globals.ThisAddIn.Application.Worksheets)
{
displayWorksheet.Range[budget_cell].Value2 = "$" + Convert.ToString(budget);
displayWorksheet.Range[account_cell].Value2 = "$0.00";
displayWorksheet.Range[transaction_cell].Value2 = "Amount";
}
}
The button opens up a separate form where the user specifies budget_cell, account_cell, and transaction_cell. I then pass that data to the above code in SolutionName.ThisAddIn.cs (where SolutionName is the namespace of the solution). Strictly speaking, the code works. However, the data doesn't show up in the cells until the button is pressed a second time. Why is that? Is it because I'm retrieving the data from a different object in the solution?
Also, I've been trying to get this code and the aforementioned form to activate when the add in first starts up.
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
frmStartup startup = new frmStartup();
startup.Show();
setAccounts();
}
I've been at this for a good twelve hours now, and I can't get it to work. What am I missing?
ThisAddIn.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using Excel = Microsoft.Office.Interop.Excel;
using Office = Microsoft.Office.Core;
using Microsoft.Office.Tools.Excel;
namespace AccountingAddIn
{
public partial class ThisAddIn
{
public static string budget_cell = "";
public static string account_cell = "";
public static string transaction_cell = "";
public static string date_cell = "";
public static string time_cell = "";
public static string description_cell = "";
public static bool date = false;
public static bool time = false;
public static bool description = false;
public static decimal budget = 0;
List<Account> accounts = new List<Account>();
public void budgetStartUp()
{
frmStartup startup = new frmStartup();
startup.Show();
setAccounts();
}
public void setAccounts()
{
foreach (Excel.Worksheet displayWorksheet in Globals.ThisAddIn.Application.Worksheets)
{
displayWorksheet.Range[budget_cell].Value2 = "$" + Convert.ToString(budget);
displayWorksheet.Range[account_cell].Value2 = "$0.00";
displayWorksheet.Range[transaction_cell].Value2 = "Amount";
if (date == true)
{
displayWorksheet.Range[date_cell].Value2 = "Date";
}
if (time == true)
{
displayWorksheet.Range[time_cell].Value2 = "Time";
}
if (description == true)
{
displayWorksheet.Range[description_cell].Value2 = "Description";
}
Account na = new Account(0, displayWorksheet);
accounts.Add(na);
}
}
protected override Microsoft.Office.Core.IRibbonExtensibility CreateRibbonExtensibilityObject()
{
return Globals.Factory.GetRibbonFactory().CreateRibbonManager(
new Microsoft.Office.Tools.Ribbon.IRibbonExtension[] { new MyRibbon() });
}
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
CreateRibbonExtensibilityObject();
budgetStartUp();
}
private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
}
}
}
frmStartup.cs:
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;
namespace AccountingAddIn
{
public partial class frmStartup : Form
{
public frmStartup()
{
InitializeComponent();
}
private void btnHelp_Click(object sender, EventArgs e)
{
MessageBox.Show("Please enter a starting amount for your budget and " +
"which cells will display the running total for your " +
"accounts." +
"\n\nNote: Leaving the budget blank will" +
" result in a starting budget of $0.00.");
}
private void btnOkay_Click(object sender, EventArgs e)
{
AccountingSeminar.ThisAddIn.budget += Convert.ToDecimal(txtStartingAmount.Text);
AccountingSeminar.ThisAddIn.budget_cell = txtBudget.Text;
AccountingSeminar.ThisAddIn.account_cell = txtAccount.Text;
AccountingSeminar.ThisAddIn.transaction_cell = txtTransaction.Text;
if (chkDate.Checked)
{
AccountingSeminar.ThisAddIn.date_cell = txtDate.Text;
AccountingSeminar.ThisAddIn.date = true;
}
if (chkTime.Checked)
{
AccountingSeminar.ThisAddIn.time_cell = txtTime.Text;
AccountingSeminar.ThisAddIn.time = true;
}
if (chkDescription.Checked)
{
AccountingSeminar.ThisAddIn.description_cell = txtDescription.Text;
AccountingSeminar.ThisAddIn.description = true;
}
Close();
}
}
}

Emulating console in winforms, the hard way how to make it better

Im trying to emulate the console in a windows forms applicaton. I have made it possible by using two extra threads and a delegate to be able to interact with my multiline textbox.
This somehow seems like I complicate things to much. So my questions.
Is there a better way of doing this?
When i press enter the command does not get sent, first if i press again it get sent? WHy is that? I ahve treid to debug it but failed to find the solution.
EDIT! Im using CsharpSSH, to do the SSH connection. Also I have included my full code now!
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 Tamir.SharpSsh;
using System.IO;
using System.Threading;
using System.Timers;
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
public string mHost;
SshShell mShell;
public string mInput;
string pattern = "";
bool mInputHolder = false;
string mPattern = "";
int mValue = 0;
bool mStatus = false;
private Thread thrdtwo = null;
private Thread thrdone = null;
public string mKorv;
string mString = "";
delegate void SetTextCallback(string text);
bool clientopen = true;
public Form1()
{
InitializeComponent();
txthost.Text = "sdf.org";
txtuser.Text = "kalle82";
txtpass.Text = "kattsand";
string pattern = "sdf:";
mPattern = pattern;
}
public void button1_Click(object sender, EventArgs e)
{
mShell = new SshShell(Host, User);
mShell.Password = Pass;
//WRITING USER MESSAGE
txtOutput.AppendText("Connecting...");
mShell.Connect();
txtOutput.AppendText("OK");
mShell.ExpectPattern = mPattern;
mShell.RemoveTerminalEmulationCharacters = true;
this.SetText(mShell.Expect(pattern));
txtInput.Focus();
thrdone = new Thread(new ThreadStart(appengine));
thrdone.Start();
}
private void appengine()
{
this.txtInput.KeyPress += new System.Windows.Forms.KeyPressEventHandler(checkforenter);
// MessageBox.Show("Appengine started");
while (mShell.ShellOpened)
{
thrdtwo = new Thread(new ThreadStart(startthread2));
thrdtwo.Start();
thrdtwo.Join();
// this.SetText(mShell.Expect(pattern));
if (clientopen == false) break;
}
// MessageBox.Show("Appengine stopped");
}
private void startthread2()
{
//Wait for answer
while (mStatus == false)
{
}
}
//Recieves keypressevent
public void checkforenter(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
if (e.KeyChar == (char)13)
{
mStatus = true;
mString = txtInput.Text;
mShell.WriteLine(mString);
this.SetText(mShell.Expect(pattern));
txtOutput.AppendText(txtInput.Text + "\n");
}
mStatus = false;
}
private void SetText(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.txtOutput.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { text });
}
else
{
this.txtOutput.Text = text.ToString();
}
}
public int checkfortrue()
{
if (mInputHolder != true)
{
mValue = 0;
}
if (mInputHolder == false)
{
mValue = -1;
}
return mValue;
}
public string userInput()
{
while (mInputHolder == true)
{
}
mInputHolder = true;
return txtInput.Text;
}
//Properties
public string Host
{
get
{
return txthost.Text;
}
set
{
txthost.Text = value;
}
}
public string User
{
get
{
return txtuser.Text;
}
set
{
txtuser.Text = value;
}
}
public string Pass
{
get
{
return txtpass.Text;
}
set
{
txtpass.Text = value;
}
}
public string Pattern
{
get
{
return pattern;
}
set
{
pattern = value;
}
}
private void button2_Click(object sender, EventArgs e)
{
clientopen = false;
}
}
}

Why I can't recieved messages from Chat Server?

Why I can't recieved messages from Chat Server ?
I developed Chat Client in Visual Studio C# with mono for android.
I want to receive mesagens from Chat server they are sent but he Chat Client may be receiving them and i can not seem to show in Text1.Text
The Source Code Chat Client for receiving messages:
//Criado por EcoDuty, Frederico Vaz
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
//
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Runtime.InteropServices;
namespace ChatClient_Android
{
[Activity(Label = "ChatClient_Android", MainLauncher = true, Icon = "#drawable/icon")]
public class MainChat : Activity
{
public delegate void OnRecievedMessage(string message);
public MainChat form;
const int WM_VSCROLL = 0x115;
const int SB_BOTTOM = 7;
TextView text1;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button ligar = FindViewById<Button>(Resource.Id.btligar);
text1 = FindViewById<TextView>(Resource.Id.text1);
//Conexão com o servidor
ligar.Click += delegate
{
Connect();
ligar.Enabled = false;
};
}
//Função Actualizar a Caixa de Entrada de Mensagens
private void UpdateTextbox(string text)
{
text1.Text += "\r\n";
text1.Text += text;
}
//Recieved Mesages
public void RecievedMessage(string message)
{
UpdateTextbox(message);
}
//TCP Connection
public StreamWriter Outgoing;
private StreamReader Incoming;
private TcpClient Connection;
private Thread Messages;
private IPAddress IP;
//public string host;
//public string nick;
//MainChat m_ParentForm;
bool isConnected;
//Função Conectar
public void Connect()
{
try
{
IP = IPAddress.Parse("10.0.2.2");
Connection = new TcpClient();
Connection.Connect(IP, 1986);
Outgoing = new StreamWriter(Connection.GetStream());
Outgoing.WriteLine("EcoDuty");
Outgoing.Flush();
//m_ParentForm.Vis(true);
Messages = new Thread(new ThreadStart(this.Communication));
Messages.Start();
}
catch (Exception e) { Disconnected(e.Message); }
}
private void Communication()
{
Incoming = new StreamReader(Connection.GetStream());
string check = Incoming.ReadLine();
if (check[0] == '1')
{
//Vis(true);
isConnected = true;
}
else
{
string Reason = "Disconnected: ";
Reason += check.Substring(2, check.Length - 2);
Disconnected(Reason);
return;
}
while (isConnected == true)
{
try
{
ServerMessage(Incoming.ReadLine());
}
catch (Exception e)
{
if (isConnected == true)
{
Disconnected("Connection to server lost");
Console.WriteLine("Connection Lost: " + e.ToString());
}
break;
}
}
}
private void ServerMessage(string message)
{
try
{
RecievedMessage(message);
}
catch { }
}
public void CloseConnection()
{
isConnected = false;
Incoming.Close();
Outgoing.Close();
Connection.Close();
Messages.Abort();
}
public void SendMessage(string message)
{
Outgoing.WriteLine(message);
Outgoing.Flush();
}
}
}

You seem to be trying to update the text from a non UI thread (if you follow the calls stack you see that the method is triggered from a dedicated thread you spawn):
private void UpdateTextbox(string text)
{
text1.Text += "\r\n";
text1.Text += text;
}
Instead use RunOnUiThread() to schedule the text change to run on the UI thread:
private void UpdateTextbox(string text)
{
RunOnUiThread(() =>
{
text1.Text += "\r\n";
text1.Text += text;
});
}
Also you should get rid of the empty exception catching you do along the way - this most likely masked the problem.
Also always check the catlog for exceptions they usually are a good indicator.

MORPG Server not catching disconnection

Ok, simple problem hopefully.
I have started to make a simple server for a simple MORPG game im making, the client connected, and then disconnects, simple, the server catches the new client, but doesn't catch when it disconnects, whats wrong?
Im hoping its something stupidly obvious.
Here's my server code:
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.Net.Sockets;
using System.IO;
using System.Threading;
namespace ChaWilPeiBle
{
public partial class MainForm : Form
{
public bool ServerON = false;
public TcpListener ServerL;
public int ServerLoad = 2;
public string ServerINFtxt = "";
public ASCIIEncoding AE = new ASCIIEncoding();
public MainForm()
{
InitializeComponent();
}
private void LBL_SS_Click(object sender, EventArgs e)
{
}
private void MainForm_Load(object sender, EventArgs e)
{
LBL_SS.ForeColor = Color.Red;
}
public void AddH(string S)
{
ServerINFtxt += S;
}
public void Server()
{
try
{
ServerL = new TcpListener(47);
ServerL.Start();
AddH("\nServer Started On Port 47");
}
catch(Exception e)
{
MessageBox.Show("Error starting Server.__________________\n"+e.ToString());
}
while (true)
{
TcpClient TCPC;
TCPC = ServerL.AcceptTcpClient();
if (ServerLoad < 100)
{
Thread T = new Thread(HandleClient);
T.Start((object)TCPC);
}
else
{
byte[] BYTES = AE.GetBytes("NoAccess:Full");
NetworkStream NS = TCPC.GetStream();
NS.Write(BYTES, 0, BYTES.Length);
}
}
}
public void HandleClient(object C)
{
ServerLoad++;
TcpClient Client = (TcpClient)C;
NetworkStream NS = Client.GetStream();
AddH("Client Connected.\nServer Load: " + ServerLoad);
Thread T = new Thread(ReadClient);
T.Start(C);
try
{
while (true) { NS.Write(AE.GetBytes(""), 0, AE.GetBytes("").Length); }
}
catch { }
ServerLoad--;
AddH("Client Disconnected.\nServer Load: " + ServerLoad);
}
public void ReadClient(object C)
{
//TcpClient Client = (TcpClient)C;
}
private void startStopToolStripMenuItem_Click(object sender, EventArgs e)
{
LBL_SS.Text = "Server On";
LBL_SS.ForeColor = Color.Green;
if (ServerON == false)
{
Thread T = new Thread(Server);
T.Start();
}
ServerON = true;
}
private void Update_Tick(object sender, EventArgs e)
{
ServerINF.Text = ServerINFtxt;
PB_SL.Value = ServerLoad;
}
}
}

If you make a blocking call to read on a network stream and it returns 0 bytes as the length that it read it means that your client has disconnected. You will not get an exception until you try write to this connection. That's my best guess as to what is happening.