To match the start or the end of a line, we use the following anchors: Caret (^): matches the positionbefore the first characterin the string. It ensures that the specified pattern occurs right at the start of a line, without any preceding characters. Dollar ($): matches the position r...
Match(String, Int32) Source: Regex.Match.cs Searches the input string for the first occurrence of a regular expression, beginning at the specified starting position in the string. C# publicSystem.Text.RegularExpressions.MatchMatch(stringinput,intstartat); ...
public static void Main() { string input = "This is a a farm that that raises dairy cattle."; string pattern = @"\b(\w+)\W+(\1)\b"; foreach (Match match in Regex.Matches(input, pattern)) Console.WriteLine("Duplicate '{0}' found at position {1}." ,match.Groups[1].Value,...
\bEnd the match at a word boundary. Remarks TheMatches(String, String, RegexOptions, TimeSpan)method is similar to theMatch(String, String, RegexOptions, TimeSpan)method, except that it returns information about all the matches found in the input string, instead of a single match. It is equi...
IsMatch(String) 表示Regex 建構函式中指定的規則運算式是否要在指定的輸入字串中尋找相符項目。 IsMatch(ReadOnlySpan<Char>) 指出Regex 建構函式中指定的正則運算式是否在指定的輸入範圍中尋找相符專案。 IsMatch(String, Int32) 表示Regex 建構函式中所指定的規則運算式,是否要從字串中指定的起始位置開始...
match("dog") # No match as "o" is not at the start of "dog". >>> pattern.match("dog", 1) # Match as "o" is the 2nd character of "dog". <re.Match object; span=(1, 2), match='o'> 如果你想定位匹配在 string 中的位置,使用 search() 来替代(另参考 search() vs. match(...
Zero or more of a a* One or more of a a+ Exactly 3 of a a{3} 3 or more of a a{3,} Between 3 and 6 of a a{3,6} Start of string ^ End of string $ A word boundary \b Non-word boundary \B Regular Expression No Match ...
Regex.Match Method (String, String, RegexOptions) Learn 登录 消除警报 我们将不再定期更新此内容。 请查看Microsoft 产品生命周期,了解此产品、服务、技术或 API 的受支持情况。 返回到主站点 Regex Methods Escape Method GetGroupNames Method GetGroupNumbers Method...
Searches the input string for the first occurrence of a regular expression with a specified input string starting position. Namespace:System.Text.RegularExpressions Assembly:(in ) Syntax C# publicMatchMatch(stringinput,intstartat) Parameters input ...
Start(String) Returns the start index of the subsequence captured by the given named-capturing group during the previous match operation. Start() Returns the start index of the previous match. C# コピー [Android.Runtime.Register("start", "()I", "")] public int Start (); Returns In...