获取两个DateTime实例的差异（以毫秒为单位）

Question

这样做的适当的万无一失的方法是什么？我正在使用ASP.NET MVC 3。

Answer 1

        DateTime a = ...
        DateTime b = ...
        var ms = a.Subtract(b).TotalMilliseconds;

Answer 2

(datetime2 - datetime1).TotalMilliseconds

Answer 3

我认为这应该有效。既然你要求万无一失，我假设你不知道这两个中的哪一个是后来的日期：）

Math.Abs((date1 - date2).TotalMilliseconds)

Answer 4

减法将是我的选择...

DateTime earlier = DateTime.Now;
// ...
DateTime later = DateTime.Now;
double result = (later - earlier).TotalMilliseconds;

Answer 5

    public static Int64 GetDifferencesBetweenTwoDate(DateTime newDate, DateTime oldDate, string type)
    {
        var span = newDate - oldDate;
        switch (type)
        {
            case "tt": return (int)span.Ticks;
            case "ms": return (int)span.TotalMilliseconds;
            case "ss": return (int)span.TotalSeconds;
            case "mm": return (int)span.TotalMinutes;
            case "hh": return (int)span.TotalHours;
            case "dd": return (int)span.TotalDays;
        }
        return 0;
    }