计算到上午8点的小时数

Question

我知道如何计算两个日期之间的差异，但我如何计算给定日期和下一个上午8点之间的时间？

Answer 1

var now = DateTime.Now;
var tomorrow8am = now.AddDays(1).Date.AddHours(8);
double totalHours = ( tomorrow8am - now).TotalHours;

Answer 2

var now = DateTime.Now;
double diffHours = 24 - (now - now.Date).TotalHours + 8;

Answer 3

这样的事情

var now = DateTime.Now();
var target = DateTime.Today.AddDays(1).AddHours(8);
var result = (target - now).Hour;

Answer 4

在同一天早上8点之前运作良好。

DateTime now = DateTime.Now;
DateTime next8am =now.Date.AddHours(8);
if(now.TimeOfDay>TimeSpan.FromHours(8))
    next8am.AddDays(1);
return next8am.Subtract(now).TotalHours