(十五)VBA常用基础知识：正则表达式的使用

1. vba正则表达式的说明

※正则表达式怎么写，这里不做说明，我是做perl的时候看了那本骆驼书然后顿悟的，以前特别怕写正则，现在还挺喜欢写的，特别是用正则解决了问题后

2.Test的用法

Sub test()
    Dim RE  As String
    Dim patt As String
    Set RE = CreateObject("VBScript.RegExp")
    pattern = "[0-9]{2,4}"
    With RE
        .pattern = patt
        .IgnoreCase = True
        .Global = True
        If .test("word1234aa") Then
            Debug.Print "11111"
        Else
            Debug.Print "22222"
        End If
        If .test("word4aa") Then
            Debug.Print "33333"
        Else
            Debug.Print "44444"
        End If
    End With
    Set RE = Nothing
End Sub

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执行结果：

原因：没有引正则的包

很遗憾，macos vba无法使用正则，因为没有正则的引用

但是上边我写的正则匹配应该是没问题的

3.Replace的用法

Sub test()
    Dim RE As String
    Set RE = CreateObject("VBScript.RegExp")
    With RE
        .pattern = "[0-9]{2,4}"
        .IgnoreCase = False
        .Global = True
    End With
    Dim str As String, ret As String
    str = "I love you 123"
    ret = RE.Replace(str, "zy")
    Debug.Print ret
    Set RE = Nothing
    '输出结果：I love you zy
End Sub

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4.Execute的用法

Sub test()
    Dim RE, patt As String, pmatch
    Set RE = CreateObject("VBScript.RegExp")
    patt = "I love ([\d]+) and ([\d]+)"
    With RE
        .pattern = patt
        .IgnoreCase = True
        .Global = True
         Set pmatch = .Execute("I love 123 and 456")
         If pmatch.Count > 0 Then
            Debug.Print pmatch(0) & "======" & pmatch(1)
         End If
    End With
    Set pmatch = Nothing
    Set RE = Nothing
End Sub

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