计算两个日期之间的天数的代码

Question

C# Code to calculate no.of days between two dates...I have start date in one textbox and end date in another textbox and i need to get no. of days between the two dates and to be displayed in third textbox and it should exclude holidays and weekends(saturday and sunday).

Answer 1

You can parse the textbox dates to date time object and then try something on the following lines.

DateTime startDate = new DateTime(2013, 03, 01);
DateTime endDate = DateTime.Today; // 12 March 2013
int totalDays = 0;
while (startDate <= endDate)
{
    if (startDate.DayOfWeek == DayOfWeek.Saturday
        || startDate.DayOfWeek == DayOfWeek.Sunday)
    {
        startDate = startDate.AddDays(1);
        continue;
    }
    startDate = startDate.AddDays(1);
    totalDays++;
}

Console.WriteLine("Total days excluding weekends: {0}", totalDays);

Answer 2

 var dateDiff = FirstDate - SecondDate; 
 double totalDays = dateDiff.TotalDays;

Answer 3

if you have two dates in textboxes viz textBox1 and textBox2

DateTime date1= new DateTime();
DateTime date2 = new DateTime();
double days;

bool isDate1Valid =DateTime.TryParse(textBox1.Text, out date1);
bool isDate2Valid =DateTime.TryParse(textBox2.Text, out date2);

if(isDate1Valid && isDate2Valid)
days = (date1-date2).TotalDays;

Edit

If you need to do it without looping , Here is how to do it. .

If date difference is too large, looping may consume some amount of extra time.

Answer 4

Try this..

    DateTime startdate = DateTime.Parse("somedate");
    DateTime enddate = DateTime.Parse("somedate");
    int daycount = 0;
    while (startdate < enddate)
    {
        startdate = startdate.AddDays(1); // Fixed
        int DayNumInWeek = (int)startdate.DayOfWeek;
        if (DayNumInWeek != 0)
        {
            if (DayNumInWeek != 6)
            { daycount += 1; }
        }
    }