Question

我有当前情况

string b = "{Lorem ipsum dolor} sit amet, consectetur adipiscing elit, 
Ut enim adminim veniam, quis {nostrud exercitation};

我想用这种方式分割字符串b：

   string[] splittedString = new string[] {
  "{Lorem ipsum dolor}",
  "sit amet, consectetur adipiscing elit, Ut enim ad minim veniam, quis", 
  "{nostrud exercitation}" };

如何使用正则表达式实现这一目标？

Answer 1

这是一个使用Regex的快捷解决方案。它还可以处理第一个{之前和/或最后一个]之后的文本的情况。

首先是正则表达式和要解析的字符串：

//Regex: get things that start with a {, followed by one or more non-} characters, followed by a } 
private const string Pattern = @"(\{[^\}]+\})";
private const string TheText = "{Lorem ipsum dolor} sit amet, consectetur adipiscing elit, Ut enim adminim veniam, quis {nostrud exercitation}";

然后输入一些代码：

 var regex = new Regex(Pattern);
 var matches = regex.Matches(TheText);
 var results = new List<string>();
 var currentIndex = 0;
 foreach (var match in matches.Cast<Match>())
 {
     var lastIndex = currentIndex;
     //pickup any undelimited text at the beginning or between delimited groups
     if (match.Index != currentIndex)
     {
         var unDelimited = TheText.Substring(currentIndex, match.Index - lastIndex);
         results.Add(unDelimited);
         currentIndex += unDelimited.Length;
     }
     results.Add(match.Groups[0].ToString());
     currentIndex += match.Length;
 }

 //finally pickup any undelimited text at the end
 if (TheText.Length > currentIndex)
 {
     results.Add(TheText.Substring(currentIndex));
 }

它依靠正则表达式来找到每个{some text here}匹配项。然后遍历那些匹配项，直接从匹配项或原始字符串的子字符串（使用匹配项的位置信息）创建一个列表。

我也用类似这样的字符串进行了测试：

private const string TheText = "before {first} middle {second} after";

最后，我的代码在未定界的文本中保留任何前导或尾随空格。您可以使用string.Trim

摆脱那些

如何使用某些定界符分割文本

1 个答案: