我有一个类似于:
的.NET Regex(?<Type1>AAA)|(?<Type2>BBB)
我正在对示例字符串使用 Matches 方法,例如"AAABBBAAA"
,然后迭代匹配。
我的目标是使用正则表达式匹配组找到匹配类型,因此对于此正则表达式,它将是:
我找不到任何GetGroupName
方法。请帮忙。
答案 0 :(得分:17)
这是你正在寻找的那种东西吗?它使用Regex.GroupNameFromNumber
,因此您无需知道正则表达式本身之外的组名称。
using System;
using System.Text.RegularExpressions;
class Test
{
static void Main()
{
Regex regex = new Regex("(?<Type1>AAA)|(?<Type2>BBB)");
foreach (Match match in regex.Matches("AAABBBAAA"))
{
Console.WriteLine("Next match:");
GroupCollection collection = match.Groups;
// Note that group 0 is always the whole match
for (int i = 1; i < collection.Count; i++)
{
Group group = collection[i];
string name = regex.GroupNameFromNumber(i);
Console.WriteLine("{0}: {1} {2}", name,
group.Success, group.Value);
}
}
}
}
答案 1 :(得分:7)
如果您想要检索特定的群组名称,可以使用Regex
.
GroupNameFromNumber
方法。
//regular expression with a named group
Regex regex = new Regex(@"(?<Type1>AAA)|(?<Type2>BBB)", RegexOptions.Compiled);
//evaluate results of Regex and for each match
foreach (Match m in regex.Matches("AAABBBAAA"))
{
//loop through all the groups in current match
for(int x = 1; x < m.Groups.Count; x ++)
{
//print the names wherever there is a succesful match
if(m.Group[x].Success)
Console.WriteLine(regex.GroupNameFromNumber(x));
}
}
此外,GroupCollection
上还有一个字符串索引器。在Match
.
Groups
属性上可访问的对象,这允许您按名称而不是索引访问匹配中的组。
//regular expression with a named group
Regex regex = new Regex(@"(?<Type1>AAA)|(?<Type2>BBB)", RegexOptions.Compiled);
//evaluate results of Regex and for each match
foreach (Match m in regex.Matches("AAABBBAAA"))
{
//print the value of the named group
if(m.Groups["Type1"].Success)
Console.WriteLine(m.Groups["Type1"].Value);
if(m.Groups["Type2"].Success)
Console.WriteLine(m.Groups["Type2"].Value);
}
答案 2 :(得分:0)
试试这个:
var regex = new Regex("(?<Type1>AAA)|(?<Type2>BBB)");
var input = "AAABBBAAA";
foreach (Match match in regex.Matches(input))
{
Console.Write(match.Value);
Console.Write(": ");
for (int i = 1; i < match.Groups.Count; i++)
{
var group = match.Groups[i];
if (group.Success)
Console.WriteLine(regex.GroupNameFromNumber(i));
}
}