Need help in C# POS web application

I am working on a Point of sale module for a web application. I need help ensuring my data stays in a money format ie 0.00

Here's my code:

Double res = Double.Parse(PriceTxtBox.Text);
            res = res * Double.Parse(QtyTxtBox.Text);
            ItemTotalTxtBox.Text = res.ToString();

            if (ItemTotalTxtBox != null)
            {
                Double rs = Double.Parse(ItemTotalTxtBox.Text);
                rs = (rs * (.075)) + Double.Parse(ItemTotalTxtBox.Text);

                Double ts = (rs *(.075));

                TotalTxtBox.Text = rs.ToString();
                TaxTxtBox.Text = ts.ToString();
            }

I can handle constraing the input on the client side.

When PriceTxtBox is 2 and QtyTxtBox is 3 I need the result to be 6.00 not 6 like I am getting now.

When ItemTotalTxtBox is 4.67 I need TotalTxtBox to be 0.35 not 0.35025 like I am getting now.

Thanks in advance.

Hi mike,

Try this code it may help u

first include package : using System.Globalization;

then put the code................

 
public void show()
        {
            Double res = Double.Parse(PriceTxtBox.Text);
            res = res * Double.Parse(QtyTxtBox.Text);
            ItemTotalTxtBox.Text = formatDblToMoney(res);
            if (ItemTotalTxtBox != null)
            {
                Double rs = Double.Parse(ItemTotalTxtBox.Text);
                rs = (rs * (.075)) + Double.Parse(ItemTotalTxtBox.Text);
                Double ts = (rs * (.075));
                TotalTxtBox.Text = formatDblToMoney(rs);
                TaxTxtBox.Text = formatDblToMoney(ts);
            } 
        }
        public static string formatDblToMoney(Double d)
        {
            return String.Format(CultureInfo.CreateSpecificCulture("en-us"), "{0:N}", d);
        }