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How append Rx data on textBox?

I trying to do an inteface to monitoring the Serial Port. I am using Visual forms. So, I had created a combobox to select the PortCOM, a TextBox to send the data to Serial Port and a TextBoxReceber to receive the Serial Data. I trying print the data received in the TextBoxReceber, I'm using the AppendText but I haven't sucess. Anybody can help me?
My Form1.cs is:
namespace ConsoleESP
{
public partial class Form1 : Form
{
string RxString = "";
public Form1()
{
InitializeComponent();
timerCOM.Enabled = true;
atualizaCOMs();
}
private void atualizaCOMs()
{
int i = 0;
bool quantDif = false;
if (comboBox1.Items.Count == SerialPort.GetPortNames().Length)
{
foreach (string s in SerialPort.GetPortNames())
{
if (comboBox1.Items[i++].Equals(s) == false)
{
quantDif = true;
}
}
}
else quantDif = true;
if (quantDif == false) return;
comboBox1.Items.Clear();
foreach(string s in SerialPort.GetPortNames())
{
comboBox1.Items.Add(s);
}
comboBox1.SelectedIndex = 0;
}
private void timerCOM_Tick(object sender, EventArgs e)
{
atualizaCOMs();
}
private void btConnect_Click(object sender, EventArgs e)
{
if(serialPort1.IsOpen == false)
{
try
{
serialPort1.PortName = comboBox1.Items[comboBox1.SelectedIndex].ToString();
serialPort1.Open();
}
catch
{
return;
}
if (serialPort1.IsOpen)
{
btConnect.Text = "Desconectar";
comboBox1.Enabled = false;
}
}
else
{
try
{
serialPort1.Close();
comboBox1.Enabled = true;
btConnect.Text = "Conectar";
}
catch
{
return;
}
}
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
if (serialPort1.IsOpen == true) serialPort1.Close();
}
private void btEnviar_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen == true)
serialPort1.Write(textBoxEnviar.Text);
}
private delegate void RefreshTextBox();
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
RxString = serialPort1.ReadExisting();
this.Invoke(new EventHandler(TrataDadoRecebido));
}
private void TrataDadoRecebido(object sender, EventArgs e)
{
textBoxReceber.AppendText(RxString);
}
}
}

How can I amend a record that I have inputting?

I am creating a To Do List using Windows Forms.
This is what I have so far.
The code for this form is as follows
namespace To_Do_List
{
public partial class To_Do_List : Form
{
public To_Do_List()
{
InitializeComponent();
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e) //this is the exit button on the toolstrip
{
Application.Exit(); //exits the program when the Exit button is clicked in dropdown menu
}
private void button4_Click(object sender, EventArgs e)//This creates the button to open the about form
{
AboutMyProgram aboutForm = new AboutMyProgram();
aboutForm.ShowDialog(); //opens about form
}
private void button3_Click(object sender, EventArgs e) //This creates the button to open the form which ammends tasks
{
AmmendItem CreateForm = new AmmendItem(this);
CreateForm.Show();
}
private void button1_Click(object sender, EventArgs e) // This creates the button to open the form which creates new tasks
{
AddItem CreateForm = new AddItem(this);
CreateForm.Show();
}
public void listView1_SelectedIndexChanged_1(object sender, EventArgs e) // This creates the table
{
}
private void button2_Click(object sender, EventArgs e) //This Allows the user to delete entries
{
if (listView1.SelectedItems != null)
{
var confirmation = MessageBox.Show(
"Are you sure you want to delete this?",
"WARNING", MessageBoxButtons.YesNo, MessageBoxIcon.Question
);
if (confirmation == DialogResult.Yes)
{
for (int i = listView1.Items.Count - 1; i >= 0; i--)
{
if (listView1.Items[i].Selected)
{
listView1.Items[i].Remove();
i--;
}
}
}
}
}
}
}
To add a task, the form looks like this
And again, the code is as follows
namespace To_Do_List
{
public partial class AddItem : Form
{
To_Do_List home;
public AddItem(To_Do_List parent)
{
InitializeComponent();
home = parent;
}
private void label1_Click(object sender, EventArgs e)
{
}
private void label1_Click_1(object sender, EventArgs e)
{
}
private void label2_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
}
private void openListToolStripMenuItem_Click(object sender, EventArgs e)
{
}
private void sortByDateToolStripMenuItem_Click(object sender, EventArgs e)
{
}
public void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
}
public void textBox1_TextChanged(object sender, EventArgs e)//Title Box
{
}
public void /*Description of Task*/richTextBox1_TextChanged(object sender, EventArgs e)
{
}
public void /*Priority Box*/comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close(); //causes the window to close but keeps the application running
}
private void aboutToDoListToolStripMenuItem_Click(object sender, EventArgs e)
{
AboutMyProgram aboutForm = new AboutMyProgram();
aboutForm.ShowDialog(); //opens about form displaying copyright information
}
public void button1_Click(object sender, EventArgs e) //create task button
{
ListViewItem item1 = new ListViewItem(Title.Text);
item1.SubItems.Add(Description.Text);
item1.SubItems.Add(Priority.Text);
item1.SubItems.Add(Date.Text);
string value = "";
bool isChecked = Completed.Checked;
if (isChecked)
item1.SubItems.Add(Completed.Text);
else
value = null;
home.listView1.Items.Add(item1);
this.Close();
}
private void Date_ValueChanged(object sender, EventArgs e)
{
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e) //Closes the window
{
this.Close();
}
}
}
The Amend form is exactly the same as the New Task form. How would I go about being able to select a record, pressing the amend button and actually changing?
I'm pretty stumped.
Also, this isn't really part of this question but I'll ask it just in case someone knows.
How would I go about being able to actually save these records so that they are there when I open the application back up again?
Thank you very much for reading, I know that I have just dumped everything but I'm really new to Windows Forms so I didn't want to accidentally miss something important out.
Edit
Am I on the right road with something like this?
public void button1_Click(object sender, EventArgs e)
{
To_Do_List editform = new To_Do_List(Title.Text);
editform.Description.Text = listView1.SelectedItems[0].SubItems[0].Text;
Still can't get it to work :/

This code for popup window.
public partial class frmToDoDetails : Form
{
public string TaskTitle { get; set; }
public string Description { get; set; }
public bool EditMode { get; set; }
public frmToDoDetails()
{
InitializeComponent();
}
private void btnSave_Click(object sender, EventArgs e)
{
TaskTitle = txtTitle.Text;
Description = txtDesc.Text;
this.DialogResult = System.Windows.Forms.DialogResult.OK;
}
private void frmToDoDetails_Load(object sender, EventArgs e)
{
if (EditMode)
{
txtTitle.Text = TaskTitle;
txtDesc.Text = Description;
}
else {
txtTitle.Text = string.Empty;
txtDesc.Text = string.Empty;
}
txtTitle.Focus();
}
}
And this for list
public partial class frmToDo : Form
{
public frmToDo()
{
InitializeComponent();
}
private void btnNew_Click(object sender, EventArgs e)
{
frmToDoDetails frm = new frmToDoDetails();
if (frm.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string[] arr = new string[2];
ListViewItem itm;
arr[0] = frm.TaskTitle;
arr[1] = frm.Description;
itm = new ListViewItem(arr);
listView1.Items.Add(itm);
}
}
private void frmToDo_Load(object sender, EventArgs e)
{
listView1.View = View.Details;
listView1.GridLines = true;
listView1.FullRowSelect = true;
//Add column header
listView1.Columns.Add("Title", 100);
listView1.Columns.Add("Desc", 70);
}
private void listView1_DoubleClick(object sender, EventArgs e)
{
ListViewItem currentItem= listView1.SelectedItems[0];
frmToDoDetails frm = new frmToDoDetails();
frm.TaskTitle = currentItem.SubItems[0].Text;
frm.Description = currentItem.SubItems[1].Text;
frm.EditMode = true;
if (frm.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
currentItem.SubItems[0].Text=frm.TaskTitle;
currentItem.SubItems[1].Text=frm.Description;
}
}
}
I am not added your complete fields(priority, date,etc..).
I hope it will help you.

Receive data from serial port in one line c#

I have code that takes data from serial com port from a weighing machine. It works okay, but receives data in several lines. I'm trying to make it receive data in one line.
In the code below I need to take weight from weigh bridge machine automatically by timer using Visual Studio 2005. It works, but I receive weight values on several lines.
I need to receive weight in one line and automatically update and convert it to an integer.
using System;
using System.IO.Ports;
using System.Windows.Forms;
namespace CommSample
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
void Application_Idle(object sender, EventArgs e)
{
label3.Text = serialPort1.IsOpen ? "[Open]" : "[Closed]";
}
private void button1_Click(object sender, EventArgs e)
{
if (pollingCheckbox.Checked)
{
timer1.Enabled = true;
}
else
{
timer1.Enabled = false;
TransmitCommand();
}
}
private void TransmitCommand()
{
if (textBox1.Text.Length > 0)
{
if (serialPort1.IsOpen)
{
serialPort1.Write(textBox1.Text + "\r");
}
}
}
private void ClosePort()
{
if (serialPort1.IsOpen)
{
serialPort1.DataReceived -= new SerialDataReceivedEventHandler(serialPort1_DataReceived);
serialPort1.Close();
}
}
private void closePortToolStripMenuItem_Click(object sender, EventArgs e)
{
ClosePort();
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
Close();
}
private void Form1_Load(object sender, EventArgs e)
{
serialPort1.PortName = Properties.Settings.Default.Port;
serialPort1.BaudRate = Properties.Settings.Default.Baud;
serialPort1.DataBits = Properties.Settings.Default.DataBits;
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), Properties.Settings.Default.Parity);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), Properties.Settings.Default.StopBits);
Application.Idle += new EventHandler(Application_Idle);
}
private void OpenPort()
{
serialPort1.Open();
serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
}
private void openPortToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenPort();
}
private void optionsToolStripMenuItem_Click(object sender, EventArgs e)
{
ClosePort();
using (Form2 form = new Form2())
{
if (form.ShowDialog(this) == DialogResult.OK)
{
serialPort1.PortName = Properties.Settings.Default.Port;
serialPort1.BaudRate = Properties.Settings.Default.Baud;
serialPort1.DataBits = Properties.Settings.Default.DataBits;
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), Properties.Settings.Default.Parity);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), Properties.Settings.Default.StopBits);
}
}
}
void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
if (!InvokeRequired)
{
if (e.EventType == SerialData.Chars)
{
string portData = serialPort1.ReadExisting();
textBox2.AppendText(portData);
}
}
else
{
SerialDataReceivedEventHandler invoker = new SerialDataReceivedEventHandler(serialPort1_DataReceived);
BeginInvoke(invoker, new object[] { sender, e });
}
}
private void pollingCheckbox_CheckedChanged(object sender, EventArgs e)
{
if (timer1.Enabled && !pollingCheckbox.Checked)
{
timer1.Enabled = false;
}
}
private void timer1_Tick(object sender, EventArgs e)
{
if (pollingCheckbox.Checked)
{
TransmitCommand();
}
}
}
}

Text property not changing?

What is happening is, even though the questionNr is set to 1, it's not changing the .Text properties of ans1-4, as well as the questionLabel. Any help would be appreciated. Also as a sub-question, is it possible to do something along the lines of if(ans1.Clicked = true)?
public partial class Form1 : Form
{
int pointCounter = 0;
private SoundPlayer _soundPlayer;
int questionNr = 1;
public Form1()
{
InitializeComponent();
_soundPlayer = new SoundPlayer("song.wav");
}
private void pictureBox1_Click(object sender, EventArgs e)
{
System.Diagnostics.Process.Start("http://www.amazon.com/Chuck-Seasons-One-Five-Blu-ray/dp/B007AFS0N2");
}
private void Form1_Load(object sender, EventArgs e)
{
_soundPlayer.PlayLooping();
}
private void label1_Click(object sender, EventArgs e)
{
}
private void muteButton_Click(object sender, EventArgs e)
{
if (muteButton.Text == "Mute")
{
muteButton.Text = "Unmute";
_soundPlayer.Stop();
}
else
{
muteButton.Text = "Mute";
_soundPlayer.PlayLooping();
}
}
private void playButton_Click(object sender, EventArgs e)
{
ans1.Visible = true;
ans2.Visible = true;
ans3.Visible = true;
ans4.Visible = true;
playButton.Visible = false;
}
public void question()
{
if (questionNr == 1)
{
questionLabel.Text = "What is Chuck's full name?";
ans1.Text = "Charles Irving Bartowski";
ans2.Text = "Charles Richard Bartowski";
ans3.Text = "Charles Luke Bartowski";
ans4.Text = "Zachary Strahovski";
}
}
private void ans1_Click(object sender, EventArgs e)
{
}
private void ans2_Click(object sender, EventArgs e)
{
}
private void ans3_Click(object sender, EventArgs e)
{
}
private void ans4_Click(object sender, EventArgs e)
{
}
}
}

Form where you invoke the question() method. First call that method from where you need.
eg: FormLoad/Button click etc..Then try
public Form1()
{
InitializeComponent();
_soundPlayer = new SoundPlayer("song.wav");
question();
}
It's good if you put a break point in your Form Load event and see how your code executed.Then you'll get an idea about the flow of your code.

How do i update an access database witin c#?

I have a withdrawal screen in my code that i when i withdraw money i want it to update the access database but my code only removes the amount of money off the database from within the program. Once the program is closed the database resets to its previous state.
My code for this screen
int moneyselected = 0;
Decimal balance = frmaccount.Balance;
public FrmTransaction()
{
InitializeComponent();
}
private void btnWithdraw_Click(object sender, EventArgs e)
{
if (moneyselected == 0)
{
MessageBox.Show("Select Amount");
}
else
{
if (moneyselected > balance)
{
MessageBox.Show("Not enough funds");
}
else
{
balance = balance - moneyselected;
OleDbCommandBuilder cb = new OleDbCommandBuilder(FrmLogin.da);
FrmLogin.da.Update(FrmLogin.ds1, "tblCustomers");
MessageBox.Show("Amount Withdrawn = " + moneyselected.ToString() + "\r\nBalance = " + balance.ToString());
}
}
}
private void btnWithdrawreceipt_Click(object sender, EventArgs e)
{
}
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
Form FrmLogin = new FrmLogin();
this.Hide();
FrmLogin.Show();
}
private void FrmTransaction_Load(object sender, EventArgs e)
{
}
private void rb10_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 10;
}
private void rb20_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 20;
}
private void rb30_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 30;
}
private void rb40_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 40;
}
private void rb50_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 50;
}
private void rb60_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 60;
}
private void rb70_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 70;
}
private void rb80_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 80;
}
private void rb90_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 90;
}
private void Cashamountbox_Enter(object sender, EventArgs e)
{
}
private void rb100_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 100;
}
private void rb150_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 150;
}
private void rb250_CheckedChanged(object sender, EventArgs e)
{
moneyselected = 250;
}
}>>LOGIN PAGE<<
}
namespace BANK_ATM_PROJECT
{
public partial class FrmLogin : Form
{
public FrmLogin()
{
InitializeComponent();
}
int failedAttempts = 0;
public static OleDbConnection con = new OleDbConnection();
string dbProvider;
string dbSource;
public static OleDbDataAdapter da;
public static DataSet ds1 = new DataSet();
string sql;
string pin;
int rownum = 0;
bool valid = false;
public static decimal balance = 0;
private void FrmLogin_Load(object sender, EventArgs e)
{
{
dbProvider = "PROVIDER=Microsoft.ACE.OLEDB.12.0;";
dbSource = "Data Source = 'D:\\bank11.accdb'";
con.ConnectionString = dbProvider + dbSource;
ds1 = new DataSet();
con.Open();
sql = " SELECT tblCustomers.* FROM tblCustomers";
da = new OleDbDataAdapter(sql, con);
rownum = da.Fill(ds1, "tblCustomers");
con.Close();
{
}
}
}
private void btnExit_Click(object sender, EventArgs e)
{
System.Environment.Exit(0);
this.Close();
}
private bool validate()
{
ds1 = new DataSet();
con.Open();
sql = "SELECT tblCustomers.* FROM tblCustomers WHERE ((tblCustomers.AccountNo) = '" + txtAccount.Text + "')";
da = new OleDbDataAdapter(sql, con);
rownum = da.Fill(ds1, "tblCustomers");
con.Close();
if (rownum != 1)
{
return false;
}
else
{
pin = ds1.Tables["tblCustomers"].Rows[0][4].ToString();
if (pin == txtPin.Text)
{
return true;
}
else
{
MessageBox.Show("INVALID PIN");
return false;
}
}
}
private void btnLogin_Click(object sender, EventArgs e)
{
valid = validate();
if (!valid)
{
//Increment the number of failed attempts
failedAttempts += 1;
if (failedAttempts == 1)
MessageBox.Show("You Have 2 Attempts Left");
if (failedAttempts == 2)
MessageBox.Show("You Have 1 Attempt Left");
//If equal to 3
if (failedAttempts == 3)
MessageBox.Show("Card Retained");
{
}
}
else
{
valid = validate();
if (valid == true)
{
if (txtAccount.Text == "11111111" && txtPin.Text == "9999")
{
Frmmanager Manager = new Frmmanager();
this.Close();
Manager.Show();
}
else
{
frmaccount account = new frmaccount();
this.Close();
account.Show();
{
txtAccount.Clear();
txtPin.Clear();
valid = validate();
if (valid == true)
{
if (txtAccount.Text == "11111111" && txtPin.Text == "9999")
{
Frmmanager Manager = new Frmmanager();
this.Close();
Manager.Show();
}
else
{
frmaccount Account = new frmaccount();
this.Close();
account.Show();
{
txtAccount.Clear();
txtPin.Clear();
}
}
}
}
}
}
}
}
}
}
I though the
ds.update would have updated it but this only seems to work within the program
Any help or advice would be appreciated

I think the problerm is in the following code,Here you cretate a new instance of FrmLogin instead of refering to the current instance:
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
Form FrmLogin = new FrmLogin();
this.Hide();
FrmLogin.Show();
}
try the following:
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
FrmLogin obj = (FrmLogin)Application.OpenForms["FrmLogin"];
this.Hide();
obj.Show();
}
And generraly when you referring to FrmLogin is better to use obj as ref in order to be sure you referenning to current instance. So add this to the start of your code:
obj = (FrmLogin)Application.OpenForms["FrmLogin"];
And every ref to FrmLogin make it via obj

are you checking the database in debug folder or in your project solution ?
try checking in debug folder.