正则表达式实现最小匹配

正则表达式默认情况下实现的是最大化匹配,这在有些情况下是非常不愿意出现的,比如下面这段代码:

# starting IndiaInventoryAPP.exe" ~~DisplayVariableValues "parameterGroup,mailRecipients,ModuleArgs"~DisplayVariableValues "LogFolder"~$binaryExitCode = 0~~$IndiaInventoryArgs = "-asWin32Console -S HKDRMSUAT3 -D $DatabaseName -U $DatabaseUserName -P $DatabasePassword -L $LogFolder -MailRecipients $mailRecipients -T $today_yyyy -Z D:\cs48516\posIds.txt"~ExecuteBinaryCommand ([ref]$binaryExitCode) "$applicationPath/IndiaInventoryAPP.exe" $IndiaInventoryArgs $true~

我们想匹配#与~中间的任何文字,实现最小匹配的方法就是利用(?i)

下面是具体实现方法:

        string commentGrammer = @"(?i)\#.*?~";
Regex commentRegex = new Regex(commentGrammer,RegexOptions.IgnoreCase|RegexOptions.Singleline);
MatchCollection commentMC = commentRegex.Matches(input);
foreach (Match match in commentMC)
{
int length = match.Length;
int index = match.Index;
richTextBox.Select(index, length);
richTextBox.SelectionColor = Color.Green;
}



原文地址:https://www.cnblogs.com/scy251147/p/2254570.html