C#:如何将开关与if语句组合？

Question

我需要将一个开关与一个if语句结合起来.

我怎样才能做到这一点？我想做这样的事情:

switch (periodtype)
{
    if(starttime>endtime)
    {
        ;
    }
    else
    {
        case 0: nextRunTime = nextRunTime.AddHours(period); break;
        case 1: nextRunTime = nextRunTime.AddMinutes(period); break;
        case 2: nextRunTime = nextRunTime.AddSeconds(period); break;
    }
}

Answer 1

有什么不对:

if(starttime<=endtime)
{
    switch (periodtype)
    {
        case 0: nextRunTime = nextRunTime.AddHours(period); break;
        case 1: nextRunTime = nextRunTime.AddMinutes(period); break;
        case 2: nextRunTime = nextRunTime.AddSeconds(period); break;
    }
}