regex - 捕获特定子字符串的最佳方法？

Question

我有一个文件，内容如下:

garbage
garbage
printfile ps = "Elopak Zufriedenheit After Sales.ps";
garbage
garbage

我想捕获 "" (双引号)之间的部分 - 但该部分的值不断变化。我已经编写了一个正则表达式来查找printfile ps - 但从那里继续的最佳方法是什么？

新代码:

Dim PFileRegex As New Regex("printfile ps *\t*= *\t*""[\w\s]*.ps\s*""") 
Dim PFilematch As Match = PFileRegex.Match(parttext)

                    If PFilematch.Success = True Then
                        Dim Quote As Char = """"c
                        Dim FirstQuote = PFilematch.Value.IndexOf(Quote)
                        Dim LastQuote = PFilematch.Value.LastIndexOf(Quote)

                        Dim PSFile = PFilematch.Value.Substring(FirstQuote + 1, (LastQuote - FirstQuote) - 1)
                        Debug.Print(PSFile)
                    Else
                        'error handlung
                    End If

Answer 1

你真的需要一个正则表达式吗？ String.Substring 效率更高。

Dim quote As Char = """"c
Dim first = printfilePs.IndexOf(quote)
Dim last = printfilePs.LastIndexOf(quote)
Dim partBetweenQuotes = ""
If first <> -1 AndAlso last > first Then
     Dim start = first + 1
     Dim length = printfilePs.Length - start - (printfilePs.Length - last)
     partBetweenQuotes = printfilePs.Substring(start, length)
End If

DEMO