transform this number (for example 22.00) to 2000 with no decimal

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Hi,

Amount text box...
the number is positive and this field should be sent as cents ( $22.00 should be sent as 2200 with no decimal).
How can I ?
in my first form page (where there is a textbox/ field )
I use

C#

private void SetPageState()
        {
         int amountInt = int.Parse(mamountTextBox.Text);
         mFormPageState.AmountContribution = amountInt.ToString("0.00");
        SavePageState();
        }

        public struct FormPageState
        {
        public int amountInt;
        public string AmountContribution;
        }

The user enter, for example, 22
and the second screen, I can display as I want:
22.00 with the following code

mAmountLabel.Text = s.AmountContribution;

So I must transform this number (for example 22.00) to 2000 with no decimal for sending on the transaction server

How can I? could you help me please?

Posted 1-Feb-11 6:46am

aspkiddy

Updated 1-Feb-11 7:26am

Sergey Alexandrovich Kryukov

v2

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3 solutions

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Richard MacCutchan · Answer 1 · 2011-02-02T05:50:00

I cannot believe the number of answers here which suggest the use of Double variables to capture a financial value, when it is well known that this can seriously affect the final outcome when such a value is used in calculations. Financial values should only ever be captured as either integer or Decimal (if the latter exists).

Nish Nishant · Answer 2 · 2011-02-01T06:50:00

Solution 1

Try something like:

C#

string cost = "22.00";
double doubleVal = 0.0;
if (Double.TryParse(cost, out doubleVal))
{
    int newVal = (int)doubleVal * 100;
    // save this value 

}

[note: a bug in the site's pre-tag formatting forces me to enter an extra line before the closing brace]

Posted 1-Feb-11 6:50am

Nish Nishant

Updated 1-Feb-11 7:36am

v6

Comments

Sergey Alexandrovich Kryukov 1-Feb-11 13:28pm

OP commented:

Hi Nishant Sivakumar,

I have some error :

Cannot implicitly convert type 'int' to 'string' on ,line 128

Collapse

Line 126: {
Line 127: int newVal = (int)doubleVal * 100;
Line 128: mPriceLabel.Text = newVal;
..............

Sergey Alexandrovich Kryukov 1-Feb-11 13:29pm

You're trying to assign integer to text property => fail :-)
--SA

Nish Nishant 1-Feb-11 13:35pm

Hey, why did you change the variable name from cost to const? Confused!

Sergey Alexandrovich Kryukov 1-Feb-11 19:46pm

Or, because I'm stupid, that's why.
Sorry!
--SA

Nish Nishant 1-Feb-11 13:36pm

I've changed it back to cost. But what were you trying to do? Perhaps the edit was accidental?

Sergey Alexandrovich Kryukov 1-Feb-11 19:49pm

Surely accidental. Well, accidental temporary loss of sanity, :-) I would say.
Pardon me.
--SA

Sergey Alexandrovich Kryukov 1-Feb-11 13:30pm

Please don't post Answer -- it will be removed.
Use "Add comment" or "Improve Question".

fjdiewornncalwe 1-Feb-11 13:51pm

I think the OP's biggest mistake here is using a string to capture the AmountContribution. He should rather be using a decimal, float or double to achieve this and them simply apply your solution of * 100 when entering into the database.

Nish Nishant 1-Feb-11 13:58pm

Possibly because it comes from some xml file or some such thing and includes the currency character (and the currency might not be the same all the time). Just a guess though. From his post about how he could not assign an int to a TextBox directly, it seems he's pretty much a newbie.

aspkiddy 1-Feb-11 14:24pm

Hi,

Now What I do ?

My code as like your code :

1st screen :

private void SetPageState()
{
int amountInt = int.Parse(mamountTextBox.Text);
mFormPageState.AmountContribution = amountInt.ToString("0.00");
SavePageState();
}

public struct FormPageState
{
public int amountInt;
public string AmountContribution;
}

and 2nd screen :

//(...)

mAmountLabel.Text = s.AmountContribution; // for user for exemple : 22.00

string cost = s.AmountContribution;
double doubleVal = 0.0;
if (Double.TryParse(cost, out doubleVal))
{
int newVal = (int)doubleVal * 100;
mPriceLabel.Text = newVal; // for check il I have 2200 or ...

}

Nish Nishant 1-Feb-11 14:27pm

I suspect this is the line that breaks:

mPriceLabel.Text = newVal;

Text expects a string. newVal is an int. But int has a ToString method that you can use. So change that line to:

mPriceLabel.Text = newVal.ToString();

aspkiddy 1-Feb-11 14:42pm

Hi Nishant,

It's work with

mPriceLabel.Text = newVal.ToString();

I see 2200 on mPriceLabel

it's great

How I can remove [If condition] ?

Beacouse I must sent this information on transaction serveur :

If I use :

string cost = s.AmountContribution;
double doubleVal = 0.0;
if (Double.TryParse(cost, out doubleVal))
{
int newVal = (int)doubleVal * 100;
//mPriceLabel.Text = newVal.ToString();

}

string strParametre = "0?,A1" + newVal.ToString() + ",DT" + DateTime.Now.ToString("MMddyyyyHHmm"); //line 223

I have this error :

Compiler Error Message: CS0103: The name 'newVal' does not exist in the current context : line 223

Nish Nishant 1-Feb-11 14:45pm

Increase the scope of newVal. You can declare it on top of the method. Set it to a default value initially.

aspkiddy 1-Feb-11 15:30pm

Hi Nishant Sivakumar,

how can i declare it on top of the method ? which method ?
namespace TotoCommerce
{
///

/// Summary description for DonationForm.
///

public partial class ConfirmationDonationForm : System.Web.UI.Page
{
private FormConfirmationPageState mFormConfirmationPageState;

string cost; //!!!!!!!!!!!!!!!!!!!!
int newVal; //!!!!!!!!!!!!!!!!!!!!

protected void Page_Load(object sender, System.EventArgs e)
{
LoadPageState();
LoadLabels();

}

private void LoadPageState()
{
object pageState = Session["FormConfirmationPage"];
if (pageState != null)
{
mFormConfirmationPageState = (FormConfirmationPageState)pageState;
}
else
{
}
}

private void SavePageState()
{
Session["FormConfirmationPage"] = mFormConfirmationPageState;
}

private void LoadLabels()
{
object FormPageState = Session["FormPage"];
DonationForm.FormPageState s = (DonationForm.FormPageState)FormPageState;

mPrenomNomLabel.Text = s.FirstName + " " + s.LastName;

mAmountLabel.Text = s.AmountContribution; //!!!!!!!!!!!!!!!!!!!! 22.00

cost = s.AmountContribution;
double doubleVal = 0.0;
if (Double.TryParse(cost, out doubleVal))
{
int newVal = (int)doubleVal * 100;
mAmountLabel.Text = newVal.ToString();//!!!!!!!!!!!!!!!!!!!! 2200
// save this value

}

protected void SubscribeButton_Click(object sender, System.EventArgs e)
{
SubscribeButton.Enabled = false;
ButtonRectifier0.Enabled = false;
string strFacturation;

strFacturation = (string)Session["Facturation"];

if (strFacturation != "EnCours")
{

Session["Facturation"] = "EnCours";

object FormPageState = Session["FormPage"];
DonationForm.FormPageState s = (DonationForm.FormPageState)FormPageState;
string strParametre = "0?,A1" + newVal.ToString() + ",DT" + DateTime.Now.ToString("MMddyyyyHHmm"); //!!!!!!!!!!!!!!!!!!!! 0

Nish Nishant 1-Feb-11 15:36pm

Okay, I assumed you wanted to use the variable outside the if-block. If so, you need to declare it at the top of the method where you need to use it. If you need to access it from multiple methods in your class, then it seems likely that this is a good candidate to be made a private field (which is what you seem to have done in your example).

aspkiddy 1-Feb-11 16:49pm

How I can declare it at the top of the method ?

public partial class ConfirmationDonationForm : System.Web.UI.Page { private FormConfirmationPageState mFormConfirmationPageState; string cost; //!!!!!!!!!!!!!!!!!!!! int newVal; //!!!!!!!!!!!!!!!!!!!!

Nish Nishant 1-Feb-11 14:28pm

BTW also reconsider your design so you don't have to store the pricing as string data. You could easily use something like Decimal to store the prices.

aspkiddy 1-Feb-11 14:43pm

How I cant use easily Decimal to store the prices ?

Richard MacCutchan 2-Feb-11 11:46am

Using double (or float) to capture this value could end up losing precision which can seriously affect any calculations done with these values. Use decimal or integer.

aspkiddy · Answer 3 · 2011-02-02T04:29:00

Hi Nishant, Markus and Sakryukov,

It works, many thanks :laugh: :) :thumbsup:

here is a solution

<pre lang="cs">private FormConfirmationPageState mFormConfirmationPageState;

            string cost;
            int newVal;

private void LoadLabels()
        {
            object FormPageState = Session["FormPage"];
            totoForm.FormPageState s = (totoForm.FormPageState)FormPageState;


            mMontantLabel.Text = s.MontantContribution;//  for  10.00
            //changement montant le format DEBUT----------------------------------------
            cost = s.MontantContribution;
            double doubleVal = 0.0;
            if (Double.TryParse(cost, out doubleVal))
            {
            newVal = (int)doubleVal * 100;
            mPriceLabel.Text = newVal.ToString();   //for :  1000

            }
        }

// (....)
        {
        SW.WriteLine(newVal.ToString() + ";" + DateTime.Now.ToString("yyyy'/'MM'/'dd' - 'HH':'mm':'ss") + ";");
                                        SW.Close();
        }

transform this number (for example 22.00) to 2000 with no decimal

3 solutions

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