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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";
}
}
}
}

I want to make a increasing number using winform MVP pattern in C#

Hi I'm practicing using winform MVP pattern in C#.
I made Models, Presenters and Views folders, and they has a each class.
(Models has Data.cs, Presenters has Datapresenter.cs and View have interface.cs and Form.cs)
I used 'FlowLayoutPanel'. and I made Label to make numbers. Like this.
My progress so far.
Here is Data.cs (Model)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace LayoutSample.Models
{
public class Data
{
public string label { get; set; }
public string CalculateArea()
{
return label;
}
}
}
Here is DataPresenter.cs (Presenter)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.Windows.Forms;
using LayoutSample.Models;
using LayoutSample.Views;
namespace LayoutSample.Presenters
{
public class DataPresenter
{
IFlowLabel LabelView;
public DataPresenter(IFlowLabel view)
{
LabelView = view;
}
public void CalculateArea()
{
Data data = new Models.Data();
data.label = string.Copy(LabelView.label);
var th = new Thread(() =>
{
for (int i = 0; i < 100; i++)
{
Label label = new Label();
Panel flowLayoutPanel1 = new Panel();
label.Text = i.ToString();
flowLayoutPanel1.Controls.Add(label);
Thread.Sleep(10);
}
});
th.Start();
}
}
}
Here is interface.cs(View)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace LayoutSample.Views
{
public interface IFlowLabel
{
string label { get; set; }
}
}
and this is Form.cs
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 LayoutSample.Models;
using LayoutSample.Presenters;
using LayoutSample.Views;
namespace LayoutSample
{
public partial class Form1 : Form, IFlowLabel
{
public Form1()
{
InitializeComponent();
}
string IFlowLabel.label
{
get
{
return flowLayoutPanel1.ToString();
}
set
{
if (flowLayoutPanel1.InvokeRequired)
{
flowLayoutPanel1.Invoke(new MethodInvoker(() =>
{
flowLayoutPanel1.Text = value;
}));
}
else
{
flowLayoutPanel1.Text = value;
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
for (int i = 0; i < 100; i++)
{
Label label = new Label();
label.AutoSize = false;
label.Width = 50;
label.Text = i.ToString();
flowLayoutPanel1.Controls.Add(label);
}
DataPresenter presenter = new DataPresenter(this);
presenter.CalculateArea();
}
}
}
From here, I want to make the numbers increasing.
How could I increase them at same time?
p.s
I've changed DataPresenter.cs
I've chagned public void Calculate Area() to
public void CalculateArea()
{
Data data = new Models.Data();
data.label = string.Copy(LabelView.label);
var th = new Thread(() =>
{
for ( int i = 1; i < 101; i++)
{
for (int j=1; j<101;j++)
{
Label label = new Label();
label.Text = j.ToString();
Console.WriteLine(label);
}
Thread.Sleep(1000);
}
});
th.Start();
}
I can watch the numbers increasing via console, but I can't see the change in WimForm. How can I bring the increment to WinForm??

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();
}
}
}

Trying to read a text file into classes then cycle through

Hi am a fairly novice when it comes to c# and I have being trying to read out a text file then splitting it into sections with classes but have trouble with where to declare them an then how to cycle through the records. here's my code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO;
using System.Collections;
using System.Windows.Forms;
namespace Assignment_3
{
public partial class Form1 : Form
{
string s;
string ss;
int i = 1;
string infilename;
int num;
SortedList sList = new SortedList();
int x = 0;
public Form1()
{
InitializeComponent();
student myself = new student();
infilename = "text.txt";
StreamReader sr1 = new StreamReader(infilename);
sList.Clear();
while ((s = sr1.ReadLine()) != null)
{
string[] strs = s.Split(',');
myself.firstname = strs[0];
myself.middlename = strs[1];
myself.surname = strs[2];
myself.dob = DateTime.Parse(strs[3]);
myself.dob.ToString(strs[3]);
myself.sex = strs[4];
ss = myself.dob.ToString("u");
sList.Add(myself.firstname, myself);
}
sr1.Close();
num = sList.Count;
student[] pArray = new student[num];
string[] keys = new string[num];
foreach (DictionaryEntry d in sList)
{
keys[x] = (string)d.Key;
pArray[x] = (student)d.Value;
x++;
}
if (i == 0)
{lblmessage.Text = "Already at the first record."; i = 1; }
if (i == num)
{lblmessage.Text = "Already at the last record.";i = num-1; }
lbllastname.Text = pArray[i].surname;
lblfirstname.Text = pArray[i].firstname;
lblsecondname.Text = pArray[i].middlename;
lbldob.Text = pArray[i].dob.ToString();
lblsex.Text = pArray[i].sex;
}
private void btnlast_Click(object sender, EventArgs e)
{
i = num;
}
private void btnfirst_Click(object sender, EventArgs e)
{
i = 0;
}
private void btnnext_Click(object sender, EventArgs e)
{
i++;
}
private void btnprev_Click(object sender, EventArgs e)
{
i--;
}
}
}
and my class file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Assignment_3
{
class student
{
public string firstname;
public string middlename;
public string surname;
public DateTime dob;
public string sex;
}
}
anyone have any ideas where am going wrong?? I have no errors but find that the text fields do not update with the new record's and then when stepped through the array class holds the correct amount of records and fields, I feel its going to be something very obvious put cant put my finger on it.
Any help would be very appreciated.

You should create new instance of student inside for loop. Because at the moment you have only one instance of student class and all items in SortedList are pointing to same object.

Winform BindingNavigator not saving item to database

I have designed a WinForm which is bound to my database using ADO.Net Entity Framework. On load my details form is populated with data from the database.
I can navigate through the items, however I can not add, save or update the item.
Below is the code for my form:
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 WindowsFormsApplication3
{
public partial class Form1 : Form
{
cpdEntities dbcontext;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
dbcontext = new cpdEntities();
cpd_recipientsBindingSource.DataSource = dbcontext.cpd_recipients.ToList();
}
private void cpd_recipientsBindingNavigatorSaveItem_Click(object sender, EventArgs e)
{
dbcontext = new cpdEntities();
dbcontext.SaveChanges();
}
}
}

Here is a simple example working with EntityFramework 4
How to Load:
using (var con = new cpdEntities())
{
cpd_recipientsBindingSource.DataSource = con.cpd_recipients.ToList();
}
How to Insert and Update:
if (cpd_recipientsBindingSource.Current == null) return;
using (var con = new cpdEntities())
{
var p = new Customer()
{
CustomerId = ((cpd_recipients)cpd_recipientsBindingSource.Current).Id,
CustomerIdNo = IdNoTextBox.Text,
CustomerName = CustomerNameTextBox.Text
};
var cus = new Customer();
if (p.CustomerId > 0)
cus = con.Customers.First(c => c.CustomerId == p.CustomerId);
cus.CustomerId = p.CustomerId;
cus.CustomerIdNo = p.CustomerIdNo;
cus.CustomerName = p.CustomerName;
if (p.CustomerId == 0)
con.Customers.AddObject(cus);
con.SaveChanges();
int i = cus.CustomerId;//SCOPE_IDENTITY
}
}

It looks like your re-instantiating your DbContext class in each of the events. Remove re-insantiating the DbContext from your saveItem event and give it a try again.