C# 如何将一个小时添加到时间跨度。C＃
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How to add an hour to a timespan. C#
提问by Jeremy
I have my TimeSpanfor a specific reason so it HAS to be in that format. I'm trying to add an hour on to the current time. Here is what I got, which does not work:
我有TimeSpan一个特定的原因，所以它必须是那种格式。我正在尝试在当前时间上增加一个小时。这是我得到的，但不起作用：
TimeSpan time1= TimeSpan.FromHours(1); // my attempt to add 2 hours
TimeSpan ts = DateTime.Now.TimeOfDay;
ts.Add(time1);
MessageBox.Show(ts.ToString()); // for showing me its result
Can you please advise?
你能给些建议么？
采纳答案by margabit
The method Addof TimeSpanis not modifying the value of ts. It is summing the values and returning a new object.
该方法Add的TimeSpan不修改的值ts。它正在对值求和并返回一个新对象。
So instead you should do:
所以你应该这样做：
TimeSpan ts = DateTime.Now.TimeOfDay;
var ts2 = ts.Add(time1);
MessageBox.Show(ts2.ToString());
回答by Daniel A. White
var newDateTime = DateTime.Now.AddHours(1);
No need to create a TimeSpan. This will roll over to tomorrow.
无需创建TimeSpan. 这将滚动到明天。
回答by Rahul Tripathi
Try using this:-
尝试使用这个：-
TimeSpan time1 = TimeSpan.FromHours(1); // my attempt to add 2 hours
TimeSpan ts = DateTime.Now.TimeOfDay;
var newts = ts.Add(time1);
MessageBox.Show(newts.ToString());
Try this:-
尝试这个：-
var newDateTime = DateTime.Now.AddHours(1);
回答by christiandev
Use AddHours();
使用 AddHours();
DateTime.Now.AddHours(1);
or, to use your code (see the newTsvariable)..
或者，使用您的代码（请参阅newTs变量）。
TimeSpan time1 = TimeSpan.FromHours(1); // my attempt to add 2 hours
TimeSpan ts = DateTime.Now.TimeOfDay;
var newTs = ts.Add(time1);
MessageBox.Show(newTs.ToString());
Also, your comment says 'my attempt to add 2 hours', is this a typo?
另外，您的评论是“我尝试增加 2 小时”，这是打字错误吗？
回答by dasblinkenlight
The reason why your code does not work is that TimeSpanis immutable. The TimeSpan.Addmethod returns a new object:
您的代码不起作用的原因TimeSpan是不可变的。该TimeSpan.Add方法返回一个新对象：
ts = ts.Add(time1);
回答by dav_i
var newTime = oldTime.Add(new TimeSpan(1, 0, 0));
Don't fall into the common mistake of not assigning the value to anything (i.e. newTime) as oldTimewill remain the same - TimeSpan.Add(...)returns TimeSpan.
不要陷入不将值分配给任何东西（即newTime）的常见错误，因为oldTime将保持不变 -TimeSpan.Add(...)返回TimeSpan。
Same applies for String.Replace(...)- easy, but devastating, to miss.
同样适用于String.Replace(...)- 容易，但具有破坏性，错过。
回答by Sudhanshu Mishra
My 2 cents: The question title says - How to add an hour to a timespan. C#, only one answer is accurate to that effect. Here's my take on adding hours to a time span:
我的 2 美分：问题标题说 - 如何在时间跨度中添加一个小时。C#，只有一个答案是准确的。这是我对增加时间跨度的看法：
public static TimeSpan AddHours(TimeSpan timeSpan, int hoursToAdd)
{
TimeSpan newSpan = new TimeSpan(0, hoursToAdd, 0, 0);
return timeSpan.Add(newSpan);
}
Here's a fiddle to Demo: https://dotnetfiddle.net/iuh66s
这是演示的小提琴：https: //dotnetfiddle.net/iuh66s
回答by Junpei Kun
ts += TimeSpan.FromHours(1);
and there you have it!
你有它！
