Question

我有以下示例字符串ABC__hdsiugid_23123_FGH1_sdfkjk_FGH2。

我想要做的是同时捕获FGH1和FGH2，同时确保我的模式以ABC开头。

当我尝试延迟模式ABC.+?(FGH\d)时，我得到FGH1并且使用贪婪模式ABC.+(FGH\d)，我得到FGH2。如何修改模式以捕获FGH1和FGH2？

Sub RexTest()
    Dim rex As New RegExp
    rex.Pattern = "ABC.+?(FGH\d)" ' or "ABC.+(FGH\d)"
    rex.Global = True
    Dim str As String: str = "ABC__hdsiugid_23123_FGH1_sdfkjk_FGH2"
    Dim mtch As Object
    For Each mtch In rex.Execute(str)
        Debug.Print mtch.SubMatches(0)
    Next
End Sub

编辑：我意识到我应该让我的问题更清楚（谢谢sln）。在我给出的示例字符串中，只有2个FGH [0-9]，但实际上可能存在任意数量。

Answer 1

你可以使用这样的正则表达式：

^(?:(?!ABC).)*|(FGH\d)

<强> Working demo

enter image description here

MATCH 1
1.  [20-24] `FGH1`
MATCH 2
1.  [32-36] `FGH2`
MATCH 3
1.  [51-55] `FGH3`
MATCH 4
1.  [80-84] `FGH4`
MATCH 5
1.  [92-96] `FGH5`
MATCH 6
1.  [117-121]   `FGH6`

Answer 2

你提到了VSTO。如果你能做到这一点，你可以从vba运行C＃段你如何整理结果超出了我。

反正。这是一个真正简单的正则表达式样本，它利用捕获集合一个特征应该在所有引擎中，但我猜只有Dot-Net。

通常，每次运行群集组表达式时都会覆盖捕获缓冲区，但是 MS只是将结果累积在一个数组中。

这是......

C＃代码

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Globalization;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Regex FghRx = new Regex(
            @"
                 ^                   # Beginning of Line
                 ABC                 # Must be an 'ABC' at bol
                 (?:                 # START Cluster group
                      .*?                 # optional non-'FGH' (and not newlines)
                      ( FGH \d+ )         # (1), The FGH Capture Collection
                 )+                  # END Cluster group, do many times
            "
            , RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline);

            string FghData =
                "ABC__hdsiugid_23123_FGH10_sdfkjk_FGH20                             \n" +
                "ABC__hdsiugid_23123_FGH11_sdfkjk_FGH21_dopqw_FGH31                 \n" +
                "ABC__hdsiugid_23123_FGH12_sdfkjk_FGH22_dopqw_FGH32                 \n" +
                "333333__ABC__hdsiugid_23123_FGH120_sdfkjk_FGH220_dopqw_FGH320      \n" +
                "ABC__hdsiugid_23123_FGH13_sdfkjk_FGH23_dopqw_FGH33_dopqw_FGH43     \n" +
                "ABC__hdsiugid_23123_FGH14_sdfkjk_FGH24_dopqw_FGH34_dopqw_FGH44     \n" +
                "333333__ABC__hdsiugid_23123_FGH121_sdfkjk_FGH221_dopqw_FGH321      \n" +
                "ABC__hdsiugid_23123_FGH15_sdfkjk_FGH25_dopqw_FGH35                 \n" +
                "ABC__hdsiugid_23123_FGH16_sdfkjk_FGH26_dopqw_FGH36                 \n" ; 

            Match FghMatch = FghRx.Match( FghData );
            while ( FghMatch.Success )
            {
                Console.WriteLine( "New Record\n------------------------" );
                CaptureCollection cc_fgh = FghMatch.Groups[1].Captures;

                for (int i = 0; i < cc_fgh.Count; i++)
                {
                    Console.WriteLine( "'{0}'", cc_fgh[i].Value );
                }
                FghMatch = FghMatch.NextMatch();
                Console.WriteLine( "------------------------\n" );
            }
            return;

        }
    }
}

输出＆gt;＆gt;

New Record
------------------------
'FGH10'
'FGH20'
------------------------

New Record
------------------------
'FGH11'
'FGH21'
'FGH31'
------------------------

New Record
------------------------
'FGH12'
'FGH22'
'FGH32'
------------------------

New Record
------------------------
'FGH13'
'FGH23'
'FGH33'
'FGH43'
------------------------

New Record
------------------------
'FGH14'
'FGH24'
'FGH34'
'FGH44'
------------------------

New Record
------------------------
'FGH15'
'FGH25'
'FGH35'
------------------------

New Record
------------------------
'FGH16'
'FGH26'
'FGH36'
------------------------

Press any key to continue . . .

与正则表达式的多重匹配

2 个答案: