CaptureCollection 类
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
表示单个捕获组进行的捕获集。 集合不可变（只读），没有公共构造函数。
public ref class CaptureCollection : System::Collections::ICollectionpublic 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::IListpublic class CaptureCollection : System.Collections.ICollectionpublic 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.ICollectiontype CaptureCollection = class
interface ICollection
interface IEnumerabletype CaptureCollection = class
interface ICollection<Capture>
interface seq<Capture>
interface IEnumerable
interface IList<Capture>
interface IReadOnlyCollection<Capture>
interface IReadOnlyList<Capture>
interface ICollection
interface IListtype 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 IEnumerablePublic Class CaptureCollection
Implements ICollectionPublic Class CaptureCollection
Implements ICollection(Of Capture), IEnumerable(Of Capture), IList, IList(Of Capture), IReadOnlyCollection(Of Capture), IReadOnlyList(Of Capture)- 继承
-
CaptureCollection
- 属性
- 实现
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
| Count |
获取组捕获的子字符串数。 |
| IsReadOnly |
获取一个值，该值指示集合是否为只读。 |
| IsSynchronized |
获取一个值，该值指示是否同步对集合的访问（线程安全）。 |
| Item[Int32] |
获取集合的单个成员。 |
| SyncRoot |
获取一个对象，该对象可用于同步对集合的访问。 |
方法
| CopyTo(Array, Int32) |
将集合的所有元素复制到从给定索引处开始的给定数组。 |
| CopyTo(Capture[], Int32) | |
| Equals(Object) |
确定指定的对象是否等于当前对象。 (继承自 Object) |
| GetEnumerator() |
提供循环访问集合的枚举器。 |
| GetHashCode() |
用作默认哈希函数。 (继承自 Object) |
| GetType() |
获取当前实例的 Type。 (继承自 Object) |
| MemberwiseClone() |
创建当前 Object的浅表副本。 (继承自 Object) |
| ToString() |
返回一个表示当前对象的字符串。 (继承自 Object) |
