C# 处理负时间跨度
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Handle negative time spans
提问by
In my output of a grid, I calculate a TimeSpanand take its TotalHours. e.g.
在我的网格输出中，我计算 aTimeSpan并取其TotalHours. 例如
(Eval("WorkedHours") - Eval("BadgedHours")).TotalHours
The goal is to show the TotalHoursas 39:44, so I need to convert the value from 7.5to 07:30. This is no problem... unless it's negative!
目标是显示TotalHoursas 39:44，所以我需要将值从 转换7.5为07:30。这没问题……除非它是负数！
I can create a TimeSpanobject from Hourswith
我可以创建一个TimeSpan从对象Hours与
TimeSpan.FromHours( (Eval("WorkedHours") - Eval("BadgedHours")).TotalHours)
If it's negative, I can't convert it to a DateTimeto use the .ToString("HH:mm")method, and the TimeSpanobject does not support the format string.
如果它是负数，我不能将它转换为 aDateTime使用该.ToString("HH:mm")方法，并且该TimeSpan对象不支持格式字符串。
回答by Daniel A. White
Just multiply it by -1 or use an absolute value function.
只需将其乘以 -1 或使用绝对值函数。
回答by jvenema
The simple solution would be to do:
简单的解决方案是：
string format = "HH:mm";
if(hours < 0)
format = "-" + format;
hours = Math.Abs(hours)
回答by SLaks
static string ToHMString(TimeSpan timespan) {
if (timespan.Ticks < 0) return "-" + ToHMString(timespan.Negate());
return timespan.TotalHours.ToString("#0") + ":" + timespan.Minutes.ToString("00");
}
Console.WriteLine(ToHMString(TimeSpan.FromHours(3))); //Prints "3:00"
Console.WriteLine(ToHMString(TimeSpan.FromHours(-27.75))); //Prints "-28:45"
This will also work correctly if the timespan is longer than 24 hours.
如果时间跨度超过 24 小时，这也将正常工作。
回答by Eugeniu Torica
There is a Negate method in the TimeSpan class.
TimeSpan 类中有一个 Negate 方法。
Link to the MSDN documentation: TimeSpan.Negate Method()
链接到 MSDN 文档： TimeSpan.Negate Method()
回答by Jared
Isn't there a TimeSpan.Durationmethod? I think this would handle what you are trying to do.
不是有TimeSpan.Duration方法吗？我认为这可以处理你想要做的事情。
回答by Christian Howe MRDJDZ
Hi i worked this into a bit of code i have been writing, hope it helps
嗨，我把它变成了我一直在写的一些代码，希望它有帮助
(results) is an int variable
(results) 是一个 int 变量
(TimeSpan.FromMinutes(result)) < TimeSpan.Zero ? "-" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm") : "" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm");
(TimeSpan.FromMinutes(result)) < TimeSpan.Zero ? "-" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm") : "" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm");
回答by Deval Patel
its working .try this
它的工作。试试这个
mytimespam.Negate();
mytimespam.Negate();
回答by sajin k
I checked to every where.But i didnt get a correct answer that why i used this way to finish
我检查了每个地方。但我没有得到正确的答案，为什么我用这种方式完成
TimeSpan diff = actualout.Subtract(actualin);
string a =(diff.ToString()).ToString();
if(a.Contains("-"))
{
diff = new TimeSpan(0,0,0,0);
}
回答by Mohammed Hedach
TimeSpan Diff = Date1 - Date2;
if ((int)Diff.TotalDays < 0) { // your code }
