CaptureCollection 类

定义

public ref class CaptureCollection : System::Collections::ICollection

public ref class CaptureCollection : System::Collections::Generic::ICollection<System::Text::RegularExpressions::Capture ^>, System::Collections::Generic::IEnumerable<System::Text::RegularExpressions::Capture ^>, System::Collections::Generic::IList<System::Text::RegularExpressions::Capture ^>, System::Collections::Generic::IReadOnlyCollection<System::Text::RegularExpressions::Capture ^>, System::Collections::Generic::IReadOnlyList<System::Text::RegularExpressions::Capture ^>, System::Collections::IList

public class CaptureCollection : System.Collections.ICollection

public class CaptureCollection : System.Collections.Generic.ICollection<System.Text.RegularExpressions.Capture>, System.Collections.Generic.IEnumerable<System.Text.RegularExpressions.Capture>, System.Collections.Generic.IList<System.Text.RegularExpressions.Capture>, System.Collections.Generic.IReadOnlyCollection<System.Text.RegularExpressions.Capture>, System.Collections.Generic.IReadOnlyList<System.Text.RegularExpressions.Capture>, System.Collections.IList

[System.Serializable]
public class CaptureCollection : System.Collections.ICollection

type CaptureCollection = class
    interface ICollection
    interface IEnumerable

type CaptureCollection = class
    interface ICollection<Capture>
    interface seq<Capture>
    interface IEnumerable
    interface IList<Capture>
    interface IReadOnlyCollection<Capture>
    interface IReadOnlyList<Capture>
    interface ICollection
    interface IList

type CaptureCollection = class
    interface ICollection
    interface IEnumerable
    interface ICollection<Capture>
    interface seq<Capture>
    interface IList<Capture>
    interface IReadOnlyCollection<Capture>
    interface IReadOnlyList<Capture>
    interface IList

[<System.Serializable>]
type CaptureCollection = class
    interface ICollection
    interface IEnumerable

Public Class CaptureCollection
Implements ICollection

Public Class CaptureCollection
Implements ICollection(Of Capture), IEnumerable(Of Capture), IList, IList(Of Capture), IReadOnlyCollection(Of Capture), IReadOnlyList(Of Capture)

继承

Object

CaptureCollection

属性

SerializableAttribute

实现

ICollection IEnumerable ICollection<Capture> ICollection<T> IEnumerable<Capture> IEnumerable<T> IList<Capture> IReadOnlyCollection<Capture> IReadOnlyCollection<T> IReadOnlyList<Capture> IList

示例

以下示例比较 Group.Captures 和 Match.Captures 属性返回的 CaptureCollection 对象中的 Capture 对象。 它还将 Group 对象与 Group.Captures 属性返回的 CaptureCollection 中的 Capture 对象进行比较。 该示例使用以下两个正则表达式在单个输入字符串中查找匹配项：

• \b\w+\W{1,2}

  此正则表达式模式标识包含一个或多个单词字符的单词，后跟一两个非单词字符，例如空格或标点符号。 正则表达式不包含任何捕获组。 该示例的输出显示 Match 对象以及 Group.Captures 返回的 CaptureCollection 对象以及 Match.Captures 属性包含有关相同匹配的信息。

• (\b\w+\W{1,2})+

  此正则表达式模式标识句子中的单词。 该模式定义一个捕获组，其中包含一个或多个单词字符，后跟一两个非单词字符。 正则表达式模式使用 + 限定符来匹配此组的一个或多个匹配项。 此示例的输出显示 Match 对象和 Match.Captures 属性返回的 CaptureCollection 对象包含有关相同匹配的信息。 第二个 Group 对象（对应于正则表达式中唯一的捕获组）仅标识最后一个捕获的字符串，而第一个捕获组的 Group.Captures 属性返回的 CaptureCollection 对象包括所有捕获的子字符串。

using System;
using System.Text.RegularExpressions;

public class Example
{
   public static void Main()
   {
      string pattern;  
      string input = "The young, hairy, and tall dog slowly walked across the yard.";
      Match match;

      // Match a word with a pattern that has no capturing groups.
      pattern = @"\b\w+\W{1,2}";
      match = Regex.Match(input, pattern);
      Console.WriteLine("Pattern: " + pattern);
      Console.WriteLine("Match: " + match.Value);
      Console.WriteLine("  Match.Captures: {0}", match.Captures.Count);
      for (int ctr = 0; ctr < match.Captures.Count; ctr++)
         Console.WriteLine("    {0}: '{1}'", ctr, match.Captures[ctr].Value);
      Console.WriteLine("  Match.Groups: {0}", match.Groups.Count);
      for (int groupCtr = 0; groupCtr < match.Groups.Count; groupCtr++)
      {
         Console.WriteLine("    Group {0}: '{1}'", 
                           groupCtr, match.Groups[groupCtr].Value);
         Console.WriteLine("    Group({0}).Captures: {1}", 
                           groupCtr, match.Groups[groupCtr].Captures.Count);
         for (int captureCtr = 0; captureCtr < match.Groups[groupCtr].Captures.Count; captureCtr++)
            Console.WriteLine("      Capture {0}: '{1}'", 
                              captureCtr, 
                              match.Groups[groupCtr].Captures[captureCtr].Value);
      }
      Console.WriteLine("-----\n");

      // Match a sentence with a pattern that has a quantifier that 
      // applies to the entire group.
      pattern = @"(\b\w+\W{1,2})+";
      match = Regex.Match(input, pattern);
      Console.WriteLine("Pattern: " + pattern);
      Console.WriteLine("Match: " + match.Value);
      Console.WriteLine("  Match.Captures: {0}", match.Captures.Count);
      for (int ctr = 0; ctr < match.Captures.Count; ctr++)
         Console.WriteLine("    {0}: '{1}'", ctr, match.Captures[ctr].Value);
      
      Console.WriteLine("  Match.Groups: {0}", match.Groups.Count);
      for (int groupCtr = 0; groupCtr < match.Groups.Count; groupCtr++)
      {
         Console.WriteLine("    Group {0}: '{1}'", groupCtr, match.Groups[groupCtr].Value);
         Console.WriteLine("    Group({0}).Captures: {1}", 
                           groupCtr, match.Groups[groupCtr].Captures.Count);
         for (int captureCtr = 0; captureCtr < match.Groups[groupCtr].Captures.Count; captureCtr++)
            Console.WriteLine("      Capture {0}: '{1}'", captureCtr, match.Groups[groupCtr].Captures[captureCtr].Value);
      }
   }
}
// The example displays the following output:
//    Pattern: \b\w+\W{1,2}
//    Match: The
//      Match.Captures: 1
//        0: 'The '
//      Match.Groups: 1
//        Group 0: 'The '
//        Group(0).Captures: 1
//          Capture 0: 'The '
//    -----
//    
//    Pattern: (\b\w+\W{1,2})+
//    Match: The young, hairy, and tall dog slowly walked across the yard.
//      Match.Captures: 1
//        0: 'The young, hairy, and tall dog slowly walked across the yard.'
//      Match.Groups: 2
//        Group 0: 'The young, hairy, and tall dog slowly walked across the yard.'
//        Group(0).Captures: 1
//          Capture 0: 'The young, hairy, and tall dog slowly walked across the yard.'
//        Group 1: 'yard.'
//        Group(1).Captures: 11
//          Capture 0: 'The '
//          Capture 1: 'young, '
//          Capture 2: 'hairy, '
//          Capture 3: 'and '
//          Capture 4: 'tall '
//          Capture 5: 'dog '
//          Capture 6: 'slowly '
//          Capture 7: 'walked '
//          Capture 8: 'across '
//          Capture 9: 'the '
//          Capture 10: 'yard.'

Imports System.Text.RegularExpressions

Module Example
   Public Sub Main()
      Dim pattern As String  
      Dim input As String = "The young, hairy, and tall dog slowly walked across the yard."
      Dim match As Match

      ' Match a word with a pattern that has no capturing groups.
      pattern = "\b\w+\W{1,2}"
      match = Regex.Match(input, pattern)
      Console.WriteLine("Pattern: " + pattern)
      Console.WriteLine("Match: " + match.Value)
      Console.WriteLine("  Match.Captures: {0}", match.Captures.Count)
      For ctr As Integer = 0 To match.Captures.Count - 1
         Console.WriteLine("    {0}: '{1}'", ctr, match.Captures(ctr).Value)
      Next
      Console.WriteLine("  Match.Groups: {0}", match.Groups.Count)
      For groupCtr As Integer = 0 To match.Groups.Count - 1
         Console.WriteLine("    Group {0}: '{1}'", groupCtr, match.Groups(groupCtr).Value)
         Console.WriteLine("    Group({0}).Captures: {1}", _
                           groupCtr, match.Groups(groupCtr).Captures.Count)
         For captureCtr As Integer = 0 To match.Groups(groupCtr).Captures.Count - 1
            Console.WriteLine("      Capture {0}: '{1}'", _
                              captureCtr, _
                              match.Groups(groupCtr).Captures(captureCtr).Value)
         Next
      Next
      Console.WriteLine("-----")
      Console.WriteLine()

      ' Match a sentence with a pattern that has a quantifier that 
      ' applies to the entire group.
      pattern = "(\b\w+\W{1,2})+"
      match = Regex.Match(input, pattern)
      Console.WriteLine("Pattern: " + pattern)
      Console.WriteLine("Match: " + match.Value)
      Console.WriteLine("  Match.Captures: {0}", match.Captures.Count)
      For ctr As Integer = 0 To match.Captures.Count - 1
         Console.WriteLine("    {0}: '{1}'", ctr, match.Captures(ctr).Value)
      Next
      Console.WriteLine("  Match.Groups: {0}", match.Groups.Count)
      For groupCtr As Integer = 0 To match.Groups.Count - 1
         Console.WriteLine("    Group {0}: '{1}'", groupCtr, match.Groups(groupCtr).Value)
         Console.WriteLine("    Group({0}).Captures: {1}", _
                           groupCtr, match.Groups(groupCtr).Captures.Count)
         For captureCtr As Integer = 0 To match.Groups(groupCtr).Captures.Count - 1
            Console.WriteLine("      Capture {0}: '{1}'", captureCtr, match.Groups(groupCtr).Captures(captureCtr).Value)
         Next
      Next
   End Sub
End Module
' The example displays the following output:
'    Pattern: \b\w+\W{1,2}
'    Match: The
'      Match.Captures: 1
'        0: 'The '
'      Match.Groups: 1
'        Group 0: 'The '
'        Group(0).Captures: 1
'          Capture 0: 'The '
'    -----
'    
'    Pattern: (\b\w+\W{1,2})+
'    Match: The young, hairy, and tall dog slowly walked across the yard.
'      Match.Captures: 1
'        0: 'The young, hairy, and tall dog slowly walked across the yard.'
'      Match.Groups: 2
'        Group 0: 'The young, hairy, and tall dog slowly walked across the yard.'
'        Group(0).Captures: 1
'          Capture 0: 'The young, hairy, and tall dog slowly walked across the yard.'
'        Group 1: 'yard.'
'        Group(1).Captures: 11
'          Capture 0: 'The '
'          Capture 1: 'young, '
'          Capture 2: 'hairy, '
'          Capture 3: 'and '
'          Capture 4: 'tall '
'          Capture 5: 'dog '
'          Capture 6: 'slowly '
'          Capture 7: 'walked '
'          Capture 8: 'across '
'          Capture 9: 'the '
'          Capture 10: 'yard.'

注解

集合不可变（只读），没有公共构造函数。 CaptureCollection 对象包含一个或多个 Capture 对象。

CaptureCollection 类的实例由以下属性返回：

• Group.Captures 属性。 集合的每个成员都表示由捕获组捕获的子字符串。 如果未将限定符应用于捕获组，则 CaptureCollection 包括一个表示与 Group 对象相同的捕获子字符串的单个 Capture 对象。 如果限定符应用于捕获组，则 CaptureCollection 为每个捕获的子字符串包含一个 Capture 对象，Group 对象仅提供有关上次捕获的子字符串的信息。

• Match.Captures 属性。 在这种情况下，集合由单个 Capture 对象组成，该对象提供有关整个匹配的信息。 也就是说，CaptureCollection 对象提供的信息与 Match 对象相同。

若要循环访问集合的成员，应使用语言提供的集合迭代构造（如 C# 中的 foreach 和 Visual Basic 中的 For Each...Next），而不是检索由 GetEnumerator 方法返回的枚举器。

属性

方法

显式接口实现

扩展方法

适用于

另请参阅

• Capture
• Group