我如何在我的程序中使用matchevaluator函数？ [英] How do I matchevaluator function in my program?

问题描述

我正在尝试搜索正则表达式

I'm trying to search a regular expression

pattern

，如果匹配，则查找该模式的值是否存在于<形式的任何标记内; sec id =sec123>在一个文件中。如果是，我想用

and, if it matches, find whether the value of that pattern exists inside any tag of the form "<sec id="sec123">" in a file. If it does, I want to replace it with

result1

替换它。我认为可以使用MatchEvaluator函数完成，但我无法弄清楚如何应用它。



我是VB.NET的新手（和编程）一般而言）并且真的不知道该怎么做。这是我到目前为止所尝试的：



样本输入：

. I think it can be done with the MatchEvaluator function, but I can't figure out how to apply it.

I'm new to VB.NET (and programming in general) and really don't know what to do. This is what I've tried so far:

sample input:

<sec id="sec1">
<p>"You fig. 23 did?" I <xref ref-type="section" rid="sec12">section 12</a> asked, surprised.</p>
<p>"There are always better terms <xref ref-type="section" rid="sec6">section 6</a>, Richard!" my mom said sharply.</p>
<p>I <xref ref-type="section" rid="sec2">section 2</a> stood. I <xref ref-type="section" rid="sec2">section 2</a> had to hurry if I <xref ref-type="section" rid="sec1">section 1</a> was going to get to work on time.
<fig id="fig4">
<caption><p>I'm confused</p></caption>
</fig> 
</p>
<p>Turning to face her, I <xref ref-type="section" rid="sec2">section 2</a> walked backward. "I"ve seriously got to get ready. Why don"t we get together for lunch and talk more then?"</p>
<sec id="sec2">
<p>"You fig. 23 can"t be""</p>
<p>I <xref ref-type="section" rid="sec4">section 4</a> adored the Art Deco elegance of the Chrysler Building. I <xref ref-type="section" rid="sec2">section 2</a> could pinpoint my place on the island in relation to the posit table 9ion of the Empire State Building.</p>
<p>I <xref ref-type="section" rid="sec1">section 1</a> felt Gideon before I <xref ref-type="section" rid="sec1">section 1</a> saw him, my entire body humming wit table 9h awareness as he stepped out of the Bentley, which had pulled up behind the Benz.</p>
</sec>
</sec>

我希望程序找到文件中的所有 rid =secX元素并检查是否 secX元素存在于任何表达式中< sec id =secX>在整个文件中，如果存在不匹配，则< xref ref-type =sectionrid =secX> section X< / a>将被删除到 X部分，这将继续，直到没有< b> rid =secX< / b>

表达式留下来检查



我尝试过：

I want the program to find all rid="secX" elements in the file and check whether that "secX" element is present inside any of the expressions <sec id="secX"> in the entire file and if there is a mismatch, then the <xref ref-type="section" rid="secX">section X</a> will be removed to section X and this will go on until there is no <b>rid="secX"</b>
expression is left to check

What I have tried:

Dim pattern As String="(?<=rid=\"sec)(\\d+)(?=\">)"
Dim r As Regex = New Regex(pattern)
Dim m As Match = r.Match(input)
If (m.Success) Then
    Dim x As String=" id=""sec"+ pattern +""""
    Dim r2 As Regex = New Regex(x)
    Dim m2 As Match = r2.Match(input)
    If (m2.Success) Then
        Dim tgPat AsString="<xref ref-type="section" rid=""sec + pattern +"">(\w+) (\d+)</a>"
        Dim tgRep As String= "$1 $2"
        Dim tgReg As New Regex(tgPat)
        Dim result1 As String = tgReg.Replace(input, tgRep)
    Else
    EndIf
EndIf
Next

推荐答案

1

2
Dim tgReg 作为 新正则表达式（tgPat）
Dim result1 As String = tgReg.Replace（input，tgRep）
否则
EndIf
EndIf
下一步

2" Dim tgReg As New Regex(tgPat) Dim result1 As String = tgReg.Replace(input, tgRep) Else EndIf EndIf Next

这样的事情应该有效：

Something like this should work:

Dim xref As New Regex("<xref[^>]+rid=""(?<id>sec\d+)""[^>]*>(?<content>[^<]+)</xref>")

Dim result As String = xref.Replace(input, Function(match)
    Dim sec As New Regex(" id=""" & match.Groups("id").Value & """")
    Return If(sec.IsMatch(input), match.Value, match.Groups("content").Value)
End Function)

但是，你应该仔细检查你的输入。它几乎看起来像HTML，除了你有一个开头的< xref> 标签以< / a> 结束标签，它不匹配。



如果输入是 HTML，你可能会更好运使用像AngleSharp这样的HTML解析器来解析并修改文件。



正则表达式语言 - 快速参考 [ ^ ]

AngleSharp - Home [ ^ ]

However, you should double-check your input. It almost looks like HTML, except you have an opening <xref> tag closed with an </a> tag, which doesn't match.

If the input is HTML, you might have better luck using an HTML parser like AngleSharp to parse and modify the document.

Regular Expression Language - Quick Reference[^]
AngleSharp - Home[^]

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