vb.net正则表达式的简单介绍

vb.net正则表达式

Imports System.Text.RegularExpressions

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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：

VB.net中正则表达式实例

在所给代码基础上仅作修改.

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) + "|"

geta = Mid(links, 1, Len(links) - 1)

geta = Replace(geta, "'", "")

re = Nothing

End Function

vb.net正则表达式的写法

var reg = /;SPLIT(?:(?!;SPLIT)[\s\S])*;SPLIT/g;

var str = "";

str.replace(reg,"");

VB.NET 正则表达式日期

var reg = /(.{4}年.{2}月.{2}日|.{2}年.{2}月.{2}日|[^\-]{2}\-[^\-]{2}|[^\/]{2}\/[^\/]{2}|[^\\]{2}\\[^\\]{2})/g;

var str = "sdfasf****年**月**日，**年**月**日，**-**，**/**，**\**asdfadf";

str.match(reg);

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.*)"

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vb.net正则表达式的简单介绍