C# 通过从当前日期中减去秒来获取 DateTime
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Get a DateTime by subtracting seconds from the current date
提问by Eric
I would like to subtract seconds from a date, for example:
我想从日期中减去秒数，例如：
Lets say I have 1300 seconds in a unsigned integer, I would like to take the current date and time, subtract 1,300 seconds from it, and end up with:
假设我在一个无符号整数中有 1300 秒，我想获取当前日期和时间，从中减去 1,300 秒，最后得到：
01/13/2012 2:15 PM(format doesn't really matter).
01/13/2012 2:15 PM（格式并不重要）。
I did try:
我确实尝试过：
DateTime dt = new DateTime();
dt.Add(new TimeSpan(0, 0, ui.OnlineTime));
Online.Text = dt.ToLongDateString();
采纳答案by dasblinkenlight
AddSeconds(double value)method of DateTimetakes positive and negative number of seconds:
AddSeconds(double value)的方法DateTime需要几秒钟正和负号：
[
valueparameter represents] a number of whole and fractional seconds. The value parameter can be negative or positive.
[
value参数代表] 整数和小数秒数。value 参数可以是负数或正数。
Hence, to subtract 1300 seconds you need to add -1300 seconds:
因此，要减去 1300 秒，您需要添加 -1300 秒：
DateTime.Now.AddSeconds(-1300);
回答by SLaks
DateTime.Now.AddSeconds(-1300)
That was easy
那很简单
回答by tobias86
Try:
尝试：
DateTime.Now.AddSeconds(-1300);
