vb.net正则表达 excel的vb正则表达式教程
VB.net中正则表达式实例
在所给代码基础上仅作修改.
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首先导入命名空间
Imports System.Text.RegularExpressions
然后:
Function geta(ByVal Str)
Dim re As New Regex("a(.+?)href=""*([^\s]+?)""*(\s|)")
Dim Contents As MatchCollection = re.Matches(Str)
Dim links As String = Nothing
For Each Match In Contents ' 遍历匹配集合。
links = links + Match.SubMatches(1) + "|"
Next
geta = Mid(links, 1, Len(links) - 1)
geta = Replace(geta, "'", "")
re = Nothing
End Function
VB.NET正则表达式
Matches[1] 就是cc的数字
Matches[2] 就是bb的数字
[0]是整个字符串
VB.NET的正则表达式
Imports System.Text.RegularExpressions '引入命名空间
dim isTrue as boolean = regex.Match(textbox1.text, _
"(.*\x22.*\x22.*)|(.*\x27.*\x27.*)").Success
' 可匹配形如："5648ffq" ,'454564565', 35235"ere"333, 434'ppp'89eru 等
'如果要匹配中文的“”、‘’
'改为："(.*\u201C.*\u201D.*)|(.*\u2018.*\u2019.*)"
vb.net 正则表达式
(a|A)href=(.*?[\u4e00-\u9fa5]{8,19}.*?)(a|A)
在需要提取的部分加上正反括号进行匿名分组，
然后用$2获取该匿名分组就可以了
或者可以做命名分组，
VB.NET用正则表达提取数字的问题！
你把替换所有非数字为空字符串,改为替换所有非数字为空格,就可以把每组数字分开了.
完整的程序如下(改动的地方见注释)
Dim bbb As String
bbb = TextBox1.Text
Dim My_str As String = Regex.Replace(bbb, "[^0-9]", " ") '这里把替换所有非数字为空字符串,改为替换所有非数字为空格
MsgBox(My_str)
vb.net正则表达式
Imports System.Text.RegularExpressions
Public Class Form1
Public Function MadeRegexArray(ByVal strText As String, ByVal strRegx As String, ByVal rexOpt As RegexOptions, ByVal Groups As Integer) As String()
REM 正则结果直接以字符串组形式返回
REM strHtml待搜索的字符串
REM strRegx正则表达式
REM rexOpt正则选项
On Error Resume Next
Return MadeMatchString(MadeRegexMatch(strText, strRegx, rexOpt), Groups)
End Function
Public Function MadeMatchString(ByVal mc As MatchCollection, ByVal Groups As Integer) As String()
REM 把MatchCollection以字符串组形式保存
REM mc正则匹配的集合
REM 返回字符串组
On Error Resume Next
Dim strRegCode(mc.Count) As String
For i As Integer = 0 To mc.Count - 1
strRegCode(i) = mc(i).Groups(Groups).Value
Next i
Return strRegCode
End Function
Public Function MadeRegexMatch(ByVal strText As String, ByVal strRegex As String, ByVal rexOpt As RegexOptions) As MatchCollection
REM 获取正则表达式匹配的集合
REM strHtml待正则的字符串
REM strRegex正则表达式
REM rexOpt正则选项
REM 返回 MatchCollection 类型集合
On Error Resume Next
Dim rex As Regex = New Regex(strRegex, rexOpt)
Return rex.Matches(strText)
End Function
Public Function MadeRegexReplace(ByVal sText As String, ByVal sRegex As String, ByVal sReplace As String) As String
REM 正则表达式文本替换
REM sText原文本
REM sRegex表达式
REM sReplace替换文本
On Error Resume Next
Dim rex As Regex = New Regex(sRegex, RegexOptions.IgnoreCase)
Return rex.Replace(sText, sReplace)
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
On Error Resume Next
Dim sRegex As String = "([\s\S]*?)"
Dim aTable() As String = MadeRegexArray(TextBox1.Text, sRegex, RegexOptions.IgnoreCase, 1)
For i As Integer = 0 To aTable.Length - 1
TextBox2.Text = TextBox2.Text aTable(i)
Next i
End Sub
End Class
如图：
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