Question

我有2个整数字段，表示YYYYMMDD格式的日期。减去其中2个字段以获得它们之间正确的天数的最佳方法是什么？

例如，如果我采用20100511和20100428之间的差异，我希望结果为13而不是83.我知道我需要将整数字段转换为日期格式，但我尝试的所有内容都会抛出异常或不工作正常。

我错过了什么？请访问vb.net中的答案

Answer 1

它应该是这样的（未经测试！）

Dim date1 As DateTime = DateTime.ParseExact(yourdate1.ToString(), "yyyyMMdd", CultureInfo.InvariantCulture)
Dim date2 As DateTime = DateTime.ParseExact(yourdate2.ToString(), "yyyyMMdd", CultureInfo.InvariantCulture)
Dim days As Integer = date1.Subtract(date2).Days

Answer 2

过度杀伤代码......

// C#

var ds1 = 20100511;
var ds2 = 20100428;

Func<int, DateTime> getDate = s => DateTime.ParseExact(s.ToString(),
                                                       "yyyyMMdd",
                                                       null);

var d1 = getDate(ds1);
var d2 = getDate(ds2);

var diff = d1.Subtract(d2);
var result = diff.Days; //13

...

//VB.Net

Dim ds1 = 20100511
Dim ds2 = 20100428

Dim getDate = Function(s) DateTime.ParseExact(s.ToString(), "yyyyMMdd", Nothing)

Dim d1 = getDate(ds1)
Dim d2 = getDate(ds2)

Dim diff = d1.Subtract(d2)
Dim result = diff.Days '13

Answer 3

    Dim dt1 As Integer = 20100510
    Dim dt2 As Integer = 20100520
    Dim date1 As DateTime = DateTime.ParseExact(dt1.ToString(), "yyyyMMdd", CultureInfo.InvariantCulture)
    Dim date2 As DateTime = DateTime.ParseExact(dt2.ToString(), "yyyyMMdd", CultureInfo.InvariantCulture)
    Dim nDays As Integer = date1.Subtract(date2).Days

Answer 4

 DateTime x = DateTime.ParseExact("19920715", "yyyyMMdd",CultureInfo.InvariantCulture);
            DateTime y = DateTime.ParseExact("20141025", "yyyyMMdd", CultureInfo.InvariantCulture);
            int days = (y.Subtract(x).Days);
            float years = days / 365;

如何以YYYYMMDD格式减去日期？

4 个答案: