从开始时间和持续时间获取结束时间

Question

我以格式hh：mm：ss开始时间，然后以小时为单位输入持续时间并选择星期几。

我想根据上述参数计算结束时间。

例如：开始时间是00:00:00，进入duartion是48小时，星期几是星期天。结束时间必须是周二的00:00:00。

怎么办？

Answer 1

试试这个：

//assuming that you have a validation for your startTime that this will always on this format "HH:mm:ss" 
private static string GetEndTime(string startTime, int duration, DayOfWeek dayOfWeek) 
{ 
    DateTime startDateTime = DateTime.Parse(startTime); 
    DateTime endDateTime = startDateTime.AddHours(duration); 

    return endDateTime.ToString("HH:mm:ss"); 
} 

private static DayOfWeek GetEndDay(int duration, DayOfWeek dayOfWeek) 
{ 
    int days = duration/24; 
    DayOfWeek endDay = dayOfWeek + days; 

    return endDay; 
} 

static void Main() 
{ 
    string testStartTime = "00:00:00"; 
    DayOfWeek startDay = DayOfWeek.Sunday; 
    int duration = 48; 

    string endTime = GetEndTime(testStartTime, duration, startDay); 
    DayOfWeek endDay = GetEndDay(duration, startDay); 
    Console.WriteLine("End Time is {0} hours on {1}", endTime, endDay.ToString()); 

} 

Answer 2

考虑使用DateTime.AddHours()功能

Answer 3

时间跨度添加到一个DateTime：

var today = System.DateTime.Now; 
var duration = new System.TimeSpan(48, 0, 0, 0); 
var endDateTime= today.Add(duration); 

Answer 4

public static void Main() 
{ 
    var today = "Sunday"; 
    DayOfWeek dw; 
    DayOfWeek.TryParse(today, true, out dw); 
    int hours = 48; 
    int days = hours/24; 
    int remainder = hours % 24; 
    DayOfWeek endDay = dw + days; 
    Console.Write("End time: {0} at {1}", endDay, remainder); 
} 

Answer 5

string start = "00:00:00"; 
DayOfWeek startDay = DayOfWeek.Sunday; 
int duration = 48; 
DateTime date = DateTime.Parse(start); 
while(date.DayOfWeek != startDay) 
{ 
    date = date.AddDays(1); 
} 
date = date.AddHours(duration); 

DayOfWeek resultDay = date.DayOfWeek; 
string time = date.ToLongTimeString();