Double-formatting on time

Question

How can I set TotalHours to be in double format, or what I need to do to get the result in txtBoxMonatstotal as a result of 93.3. This is my code:

private void calendar1_MonthChanged(object sender, EventArgs e)
{
    DateTime start = new DateTime(calendar1.CurrentDate.Year, calendar1.CurrentDate.Month, 1);
    DateTime stop = new DateTime(calendar1.CurrentDate.Year, calendar1.CurrentDate.Month, 1).AddMonths(1).AddDays(-1);
    int numberOfWorkDays = GetNumberOfWorkingDays(start, stop);

    double shouldWorkPerMonth = tag_durschnit * numberOfWorkDays;
    double workedPerMonth = workingHours.Where(x => x.Key.Date.Year == start.Year && x.Key.Month == start.Month).Sum(x => x.Value.TotalHours);
    double saldo = workedPerMonth - shouldWorkPerMonth;

    txtBoxMonatstotal.Text = workedPerMonth.ToString();
    txtBoxSollzeit.Text = shouldWorkPerMonth.ToString();
    txtBoxSaldo.Text = saldo.ToString();

}

The current result looks like this:

Thank you for your help

Round the value first before converting it to string. [Math.Round()](https://msdn.microsoft.com/en-us/library/system.math.round(v=vs.110).aspx) — John Woo, Jan 22 '18 at 09:02
This is what you should do: `Math.Round(workedPerMonth).ToString("N1")`. — Tetsuya Yamamoto, Jan 22 '18 at 09:03
Or you could just format your output https://stackoverflow.com/questions/1421520/formatting-doubles-for-output-in-c-sharp — BugFinder, Jan 22 '18 at 09:03
thanks a lot @MongZhu that's right workedPerMonth.ToString("00.0") — Mara, Jan 22 '18 at 09:10
do you care about the decimal on the second place? if the value would be `93.39` would you want to print `93.4` ? — Mong Zhu, Jan 22 '18 at 09:12
then you need to round first! `workedPerMonth.ToString("00.0")` will give you `93.3` if the value is `93.39`. It will only cut away all decimals after the first decimal place — Mong Zhu, Jan 22 '18 at 09:17
Possible duplicate of [Calculate relative time in C#](https://stackoverflow.com/questions/11/calculate-relative-time-in-c-sharp) — Lewis86, Jan 22 '18 at 09:59

score 1 · Accepted Answer · answered Jan 22 '18 at 09:19

1

You need to round the number first and then call ToString on it

txtBoxMonatstotal.Text = System.Math.Round(workedPerMonth, 1).ToString();

the second parameter in Round determines

the number of fractional digits in the return value.

answered Jan 22 '18 at 09:19

Mong Zhu

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Double-formatting on time

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