Formatting 2 decimal places?

[ProcalX]

At the end of a calculation Pweight stores a number, I need to format this number so that it only shows to 2 decimal places.. I have tried this:

            If cmbSub.SelectedItem = "NAC(N - acetlycsteine)" Then
                While i > 0
                    'Calculate current weight - % annual deterioration
                    Pweight = Pweight - (Pweight * Deterioration / 100)

                    'remove 1 year from each succesful loop
                    i = i - 1
                End While
                txtResult.Text = Pweight
                lblMsg2.Text = Today + "."
                lblMsg3.Text = "This is a calculation of the deterioration of " + Oweight.ToString()
                lblMsg4.Text = "Grams of " + cmbSub.SelectedItem + " substance. The amount remaining of " + cmbSub.SelectedItem + " after " + cmbYear.SelectedItem + " years is " + Pweight.ToString(Format(1.9, "0.00")) + "."
            End If

This actually seems to make it miss calculate, so I've put it back to Pweight.ToString() and left it at that but I get around 12 decimal places.

 

[newguy]

When concatenating strings use the & operator not the + (addition) operator.

Pweight.ToString("0.00")

 

[JuggaloBrotha]

Personally I would do .ToString("N:2")... the "N" means it's a number and the "2" means 2 decimal places.

 

[Mickroy]

There's always the old school FormatCurrency function aswell... check out Microsoft.VisualBasic.Strings.FormatCurrency.

 

[JuggaloBrotha]

There's always the old school FormatCurrency function aswell... check out Microsoft.VisualBasic.Strings.FormatCurrency.

The only thing with that is he's calculating a weight (not cost) of a substance and he want's it displayed to 2 decimal places. The FormatCurrency() function will add a $ to the beginning of it, which represents money, not an item/element's weight.

Even if he wanted it displayed as currency, I wouldn't use the vb6 legacy function for that especially since .ToString("c") outputs currency for you.