使用TimeSpan和DateTime进行计算

如果:

OpeningTime <= DateTime.Now.TimeOfDay <= ClosingTime

嗯,一个 TimeSpan 是衡量 两次之间的差异 ,不是 实际时间 .

假设您正在使用 时间跨度 指示打开和关闭时间 相对于午夜 尝试

TimeSpan currentTime = DateTime.Now.TimeOfDay;   
bool isOpen = currentTime > OpeningTime && currentTime < ClosingTime;

尝试以下操作:

var timeOfDay = DateTime.Now.TimeOfDay;
if (timeOfDay >= OpeningTime && timeOfDay < ClosingTime)
{
    // open now!
}

你可以使用 DateTime.Now.TimeOfDay 并与您的2个时间跨度进行比较

    OpeningTime = new TimeSpan(9, 30, 0); // 9:30AM
    ClosingTime = new TimeSpan(17, 30, 0); // 5:30AM

    bool isOpen = DateTime.Now.TimeOfDay >= OpeningTime && DateTime.Now.TimeOfDay <= ClosingTime;

TimeSpan OpeningTime = new TimeSpan(8, 0, 0);
TimeSpan ClosingTime = new TimeSpan(16, 0, 0);

TimeSpan now = DateTime.Now - DateTime.Now.Date;

if (now > OpeningTime && now < ClosingTime)
{ 
    //...
}