使用正则表达式在字符串中查找日期

I am trying to use regular Expressions to extract the dates from a string using VBA in Excel.

我试图使用常规表达式使用Excel中的VBA从字符串中提取日期。

The string is:

字符串是:

Previous Month: 9/1/2015 - 9/30/2015

Or it can be :

或者它可以是:

Custom: 9/1/2015 - 9/30/2015

Do you have any idea how can I achieve that? I have never used Regular Expressions before.

你知道我怎么能实现这个目标吗?我之前从未使用过正则表达式。

2 个解决方案

#1

RegEx is a poor choice for dates. You could look for : and examine the remaining tokens:

RegEx是日期的糟糕选择。你可以寻找:并检查剩余的令牌:

Sub Foo()
    Dim result() As Variant

    result = GetDates("Previous Month: 9/1/2015 - 9/30/2015")

    If UBound(result) Then
        Debug.Print result(0)
        Debug.Print result(1)
    End If
End Sub

Function GetDates(str As String) As Variant()
    Dim tokens() As String
    tokens = Split(Mid$(str, InStr(str & ": ", ":")), " ")

    If (UBound(tokens) = 3) Then
        If IsDate(tokens(1)) And IsDate(tokens(3)) Then
            GetDates = Array(CDate(tokens(1)), CDate(tokens(3)))
            Exit Function
        End If
    End If

    ReDim GetDates(0)
End Function

#2

Try this:

([1-9]|1[012])[/]([1-9]|[1-2][0-9]|3[01])[/](19|20)[0-9]{2}