日期计算差异(JavaScript VS .NET)

时间:2010-11-08 03:06:14

标签: javascript .net datediff

我正在尝试计算“timeago”,我的代码中出现了一个不足之处。

使用今天的日期

  

2010年11月7日

如果我使用 2010年9月1日,那么我的.NET代码和我的JS代码都说“2个月”

如果我使用 2010年8月31日,那么我的.NET代码会说“3个月”而我的JS代码会在“2个月”中说明

这种差异一直持续到 2010年8月9日

基于今天的11月7日日期,8月10日至8月31日期间,dateDiff基本上是“关闭”。

这是JavaScript(取自“timeago”插件)

    var words = seconds < 45 && substitute($l.seconds, Math.round(seconds)) ||
    seconds < 90 && substitute($l.minute, 1) ||
    minutes < 45 && substitute($l.minutes, Math.round(minutes)) ||
    minutes < 90 && substitute($l.hour, 1) ||
    hours < 24 && substitute($l.hours, Math.round(hours)) ||
    hours < 48 && substitute($l.day, 1) ||
    days < 30 && substitute($l.days, Math.floor(days)) ||
    days < 60 && substitute($l.month, 1) ||
    days < 365 && substitute($l.months, Math.floor(days / 30)) ||
    years < 2 && substitute($l.year, 1) ||
    substitute($l.years, Math.floor(years));

这是我的.NET代码(由我编写)

    Public Function ToDuration(ByVal dt As Date?, _
                               Optional ByVal suffixAgo As String = Nothing) As String

        If Not dt Is Nothing Then
            Dim theDate As Date = dt
            Dim SecondsAppart As Integer = DateDiff(DateInterval.Second, theDate, Now)
            Dim output As String
            If SecondsAppart < 86400 Then
                Select Case SecondsAppart
                    Case Is <= 59 : output = "less than a minute " & suffixAgo
                    Case Is <= 119 : output = "about a minute " & suffixAgo
                    Case Is <= 3599 : output = DateDiff(DateInterval.Minute, theDate, Now) & " minutes " & suffixAgo
                    Case Is <= 7199 : output = "about an hour " & suffixAgo
                    Case Else : output = DateDiff(DateInterval.Hour, theDate, Now) & " hours " & suffixAgo
                End Select

            Else
                Dim DaysAppart As Integer = DateDiff(DateInterval.Day, theDate, Now)
                Select Case DaysAppart
                    Case Is <= 1 : output = "yesterday"
                    Case Is <= 30 : output = DateDiff(DateInterval.Day, theDate, Now) & " days " & suffixAgo
                    Case Is <= 60 : output = "about a month " & suffixAgo
                    Case Is <= 365 : output = DateDiff(DateInterval.Month, theDate, Now) & " months " & suffixAgo
                    Case Is <= 730 : output = "about a year " & suffixAgo
                    Case Else : output = DateDiff(DateInterval.Year, theDate, Now) & " years " & suffixAgo
                End Select
            End If

            Return output
        Else
            Return String.Empty
        End If
    End Function

所以我遇到的问题既是基础问题,也是后勤问题。

  1. 对于DateDiff,哪个代码是“正确的”? ( IE:2个月14天是2个月还是3个?
  2. 让他们相应排队的最佳方法是什么?

1 个答案:

答案 0 :(得分:1)

做了一些假设并且不得不用C#编写,但是这个版本的代码给了我8月31日的2个月和8月9日的3个月

        public static string ToDuration(DateTime dt, string suffixAgo)
        {
            string output;
            DateTime theDate;
            if (dt == null)
            {
                output = "now";
            }
            else
            {
                theDate = dt;
                TimeSpan DateInterval = DateTime.Now - theDate;
                int SecondsAppart = Convert.ToInt32(Math.Floor(DateInterval.TotalSeconds));
                if ((SecondsAppart < 86400))
                {

                    if (SecondsAppart < 59)
                        output = ("less than a minute " + suffixAgo);
                    else if (SecondsAppart < 119)
                        output = ("about a minute " + suffixAgo);
                    else if (SecondsAppart < 3599)
                        output = string.Format("{0} minutes {1}", Math.Floor(DateInterval.TotalMinutes), suffixAgo);
                    else if (SecondsAppart < 7199)
                        output = "about an hour " + suffixAgo;
                    else
                        output = string.Format("{0} hours {1}", Math.Floor(DateInterval.TotalHours), suffixAgo);
                }
                else
                {
                    int DaysAppart = Convert.ToInt32(DateInterval.TotalDays);
                    if (DaysAppart <= 1)
                        output = "yesterday";
                    else if (DaysAppart < 30)
                        output = string.Format("{0} days {1}", Math.Floor(DateInterval.TotalDays), suffixAgo);
                    else if (DaysAppart < 60)
                        output = "about a month " + suffixAgo;
                    else if (DaysAppart < 365)
                        output = string.Format("{0} months {1}", Math.Floor(DateInterval.TotalDays/30), suffixAgo);
                    else if (DaysAppart < 730)
                        output = ("about a year " + suffixAgo);
                    else
                        output = string.Format("{0} year {1}", Math.Floor(DateInterval.TotalDays/365), suffixAgo);
                }
            }
            return output;
        }

我已经更新了代码,我认为你现在有了预期的结果。希望这会有所帮助。

干杯,瓦格纳。