Adding new prices to old one and keeping the result in a textbox using C#

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C#

C#4.0

Thanks Guys. i just discovered my problem.
i Declared decimal Price = .00m;
for the txtTotalSales.Text to be parsed, the .00 becomes a problem. am just grateful for the coperation u guys have shown me so far.

Now am unto the next level and this is about the second question i posed before. Please check the code below and tell me what to do.


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<pre>sealed class SerialPortDataRead//for serial port communication
{

// Create the serial port with basic settings

private readonly SerialPort port = new SerialPort("COM5", 9600, Parity.None, 8, StopBits.One);
private readonly Form1 form1;

public SerialPortDataRead(Form1 form1)
{
// TODO: Complete member initialization
this.form1 = form1;
}

public SerialPortDataRead()
{
// TODO: Complete member initialization

}

private void Serial()
{
//beep the default system sound to indicate an incoming data
SystemSounds.Beep.Play();

// Attach a method to be called when there is data waiting in the port's buffer

port.DataReceived += port_DataReceived;

// Begin communications

port.Open();

// Enter an application loop to keep this thread alive

Application.Run();

}

private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{ // Arrange the incoming data in an array

string[] PortVal = { port.ReadExisting() };

double[] Check = new double[6]
{120, 120, 100, 100, 150, 100};//this is the price array

string[] SecondMenuList = new string[6]
{"Screw Driver", "Tape", "Glue", "Marker", "Halogen"};//this the mainarray

string FirstSelection = "";
string value = "";
using (Form1 frm = new Form1())
{
string[] c = { "1", "2", "3", "4" };
for (int i = 0; i &amp;lt; 3; i++)
if (PortVal[i] == SecondMenuList[i])//this is where the problem lies


// I want to only compare the first three letters of each elements in PortVal at

//any index with the first three letters of the elements in the

//SecondMenulist array. but i can only compare the elements

//what should i do here PLEASE?

{
FirstSelection += String.Format("{0}\t:{1:c}\r\n", SecondMenuList[i], Check[i]);
value = Check[i].ToString("c");
if (PortVal.Contains(c[i]))
{


//after the comparison, if there is any match, add the matched element

//in the SecondMenuList array to the DataGrid Table (named Table)

this.form1._names.Add("TABLE");
this.form1._dataArray.Add(new string[] { c[i] });
}
this.form1._names.Add("ITEM");
this.form1._dataArray.Add(new string[] { SecondMenuList[i] });
this.form1._names.Add("PRICE");
this.form1._dataArray.Add(new string[] { Check[i].ToString("c") });
}
frm.txtTotalSales.Text = value;
}
DateTime Date = new DateTime();
Date = DateTime.Now;
PrinterHelper.SendStringToPrinter(String.Format("Order(s)\r\n\n\t{0}\t:{1}\r\n\n\t{2}",
FirstSelection,
value,
Date));

}
}

public Form1()
{
InitializeComponent();


dataGridView1.DataSource = GetResultsTable();

}

public Form1(TextBox txtTotalSales)
{
// TODO: Complete member initialization
this.txtTotalSales = txtTotalSales;
}

private static SerialPortDataRead port_DataReceived()
{
throw new NotImplementedException();
}

public DataTable GetResultsTable()
{
DataTable Table = new DataTable();
for (int i = 0; i &amp;lt; this._dataArray.Count; i++)
{
string name = this._names[i];
Table.Columns.Add(name);
List&amp;lt;object&amp;gt; objectNumbers = new List&amp;lt;object&amp;gt;();
foreach (string number in this._dataArray[i])
{
objectNumbers.Add((object)number);
}
while (Table.Rows.Count &amp;lt; objectNumbers.Count)
{
Table.Rows.Add();
}
for (int a = 0; a &amp;lt; objectNumbers.Count; a++)
{
Table.Rows[a][i] = objectNumbers[a];
}
}
return Table;
}
</pre>
Thanks