How to find the difference between two dates

How can 开发者_运维百科I find the difference between two dates. For example, the difference between a birthdate and the current date. Both dates would be in text boxes.

I'll simply assume a text box named BirthdateTextBox exists and contains your birth date:

DateTime birthDate = DateTime.Parse(BirthdateTextBox.Text);
TimeSpan timeBetweenDates = DateTime.Now.Subtract(birthDate);

There are also some overloads of DateTime.Parse, as well as DateTime.TryParse, that you should read about in the documentation.

1. Convert the string obtained from text box to DateTime format.

   DateTime dt1 = Convert.ToDateTime(textBoxStringOne);

   DateTime dt2 = Convert.ToDateTime(textBoxStringTwo);

2. Compute the difference

   System.TimeSpan difference = dt1.Subtract(d2); // Assuming dt1 > dt2

Hope, this should give you an idea.

look into the DateTime class, it supports subtracting two dates, which will result in a TimeSpan.

You can create a DateTime object from a string by using its Parse() or ParseExact() methods, there are plenty of examples on how to use these here on SO or on msdn - it depends on the format of your time string.

You can use DATEDIFF (datepart ,startdate ,enddate )

1.datepart- difference in yr,month 2. startDate 3. enddate

2 and 3 are DateTime objects

DateTime.Now will get currentDate

Read more for DateDiff()