StringCollection 클래스

아티클
08/21/2007

문자열의 컬렉션을 나타냅니다.

네임스페이스: System.Collections.Specialized
어셈블리: System(system.dll)

구문

‘선언
<SerializableAttribute> _
Public Class StringCollection
    Implements IList, ICollection, IEnumerable
‘사용 방법
Dim instance As StringCollection

[SerializableAttribute] 
public class StringCollection : IList, ICollection, IEnumerable

[SerializableAttribute] 
public ref class StringCollection : IList, ICollection, IEnumerable

/** @attribute SerializableAttribute() */ 
public class StringCollection implements IList, ICollection, 
    IEnumerable

SerializableAttribute 
public class StringCollection implements IList, ICollection, 
    IEnumerable

설명

StringCollection은 Null 참조(Visual Basic의 경우 Nothing)을 유효한 값으로 받아들이며 중복 요소를 허용합니다.

문자열을 비교할 때 대/소문자를 구분합니다.

이 컬렉션에 있는 요소는 정수 인덱스를 사용하여 액세스할 수 있습니다. 이 컬렉션의 인덱스는 0부터 시작합니다.

예제

다음 코드 예제에서는 StringCollection의 속성 및 메서드 일부를 보여 줍니다.

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesStringCollection

   Public Shared Sub Main()

      ' Create and initializes a new StringCollection.
      Dim myCol As New StringCollection()

      ' Add a range of elements from an array to the end of the StringCollection.
      Dim myArr() As String = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}
      myCol.AddRange(myArr)

      ' Display the contents of the collection using foreach. This is the preferred method.
      Console.WriteLine("Displays the elements using foreach:")
      PrintValues1(myCol)

      ' Display the contents of the collection using the enumerator.
      Console.WriteLine("Displays the elements using the IEnumerator:")
      PrintValues2(myCol)

      ' Display the contents of the collection using the Count and Item properties.
      Console.WriteLine("Displays the elements using the Count and Item properties:")
      PrintValues3(myCol)

      ' Add one element to the end of the StringCollection and insert another at index 3.
      myCol.Add("* white")
      myCol.Insert(3, "* gray")

      Console.WriteLine("After adding ""* white"" to the end and inserting ""* gray"" at index 3:")
      PrintValues1(myCol)

      ' Remove one element from the StringCollection.
      myCol.Remove("yellow")

      Console.WriteLine("After removing ""yellow"":")
      PrintValues1(myCol)

      ' Remove all occurrences of a value from the StringCollection.
      Dim i As Integer = myCol.IndexOf("RED")
      While i > - 1
         myCol.RemoveAt(i)
         i = myCol.IndexOf("RED")
      End While

      ' Verify that all occurrences of "RED" are gone.
      If myCol.Contains("RED") Then
         Console.WriteLine("*** The collection still contains ""RED"".")
      End If 
      Console.WriteLine("After removing all occurrences of ""RED"":")
      PrintValues1(myCol)

      ' Copy the collection to a new array starting at index 0.
      Dim myArr2(myCol.Count) As String
      myCol.CopyTo(myArr2, 0)

      Console.WriteLine("The new array contains:")
      For i = 0 To myArr2.Length - 1
         Console.WriteLine("   [{0}] {1}", i, myArr2(i))
      Next i
      Console.WriteLine()

      ' Clears the entire collection.
      myCol.Clear()

      Console.WriteLine("After clearing the collection:")
      PrintValues1(myCol)
   End Sub 'Main


   ' Uses the foreach statement which hides the complexity of the enumerator.
   ' NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   Public Shared Sub PrintValues1(myCol As StringCollection)
      Dim obj As [Object]
      For Each obj In  myCol
         Console.WriteLine("   {0}", obj)
      Next obj
      Console.WriteLine()
   End Sub 'PrintValues1


   ' Uses the enumerator. 
   ' NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   Public Shared Sub PrintValues2(myCol As StringCollection)
      Dim myEnumerator As StringEnumerator = myCol.GetEnumerator()
      While myEnumerator.MoveNext()
         Console.WriteLine("   {0}", myEnumerator.Current)
      End While
      Console.WriteLine()
   End Sub 'PrintValues2


   ' Uses the Count and Item properties.
   Public Shared Sub PrintValues3(myCol As StringCollection)
      Dim i As Integer
      For i = 0 To myCol.Count - 1
         Console.WriteLine("   {0}", myCol(i))
      Next i
      Console.WriteLine()
   End Sub 'PrintValues3

End Class 'SamplesStringCollection 


'This code produces the following output.
'
'Displays the elements using foreach:
'   RED
'   orange
'   yellow
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'Displays the elements using the IEnumerator:
'   RED
'   orange
'   yellow
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'Displays the elements using the Count and Item properties:
'   RED
'   orange
'   yellow
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'After adding "* white" to the end and inserting "* gray" at index 3:
'   RED
'   orange
'   yellow
'   * gray
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'   * white
'
'After removing "yellow":
'   RED
'   orange
'   * gray
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'   * white
'
'After removing all occurrences of "RED":
'   orange
'   * gray
'   green
'   blue
'   indigo
'   violet
'   * white
'
'The new array contains:
'   [0] orange
'   [1] * gray
'   [2] green
'   [3] blue
'   [4] indigo
'   [5] violet
'   [6] * white
'
'After clearing the collection:
'

using System;
using System.Collections;
using System.Collections.Specialized;

public class SamplesStringCollection  {

   public static void Main()  {

      // Create and initializes a new StringCollection.
      StringCollection myCol = new StringCollection();

      // Add a range of elements from an array to the end of the StringCollection.
      String[] myArr = new String[] { "RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED" };
      myCol.AddRange( myArr );

      // Display the contents of the collection using foreach. This is the preferred method.
      Console.WriteLine( "Displays the elements using foreach:" );
      PrintValues1( myCol );

      // Display the contents of the collection using the enumerator.
      Console.WriteLine( "Displays the elements using the IEnumerator:" );
      PrintValues2( myCol );

      // Display the contents of the collection using the Count and Item properties.
      Console.WriteLine( "Displays the elements using the Count and Item properties:" );
      PrintValues3( myCol );

      // Add one element to the end of the StringCollection and insert another at index 3.
      myCol.Add( "* white" );
      myCol.Insert( 3, "* gray" );

      Console.WriteLine( "After adding \"* white\" to the end and inserting \"* gray\" at index 3:" );
      PrintValues1( myCol );

      // Remove one element from the StringCollection.
      myCol.Remove( "yellow" );

      Console.WriteLine( "After removing \"yellow\":" );
      PrintValues1( myCol );

      // Remove all occurrences of a value from the StringCollection.
      int i = myCol.IndexOf( "RED" );
      while ( i > -1 )  {
         myCol.RemoveAt( i );
         i = myCol.IndexOf( "RED" );
      }

      // Verify that all occurrences of "RED" are gone.
      if ( myCol.Contains( "RED" ) )
         Console.WriteLine( "*** The collection still contains \"RED\"." );

      Console.WriteLine( "After removing all occurrences of \"RED\":" );
      PrintValues1( myCol );

      // Copy the collection to a new array starting at index 0.
      String[] myArr2 = new String[myCol.Count];
      myCol.CopyTo( myArr2, 0 );

      Console.WriteLine( "The new array contains:" );
      for ( i = 0; i < myArr2.Length; i++ )  {
         Console.WriteLine( "   [{0}] {1}", i, myArr2[i] );
      }
      Console.WriteLine();

      // Clears the entire collection.
      myCol.Clear();

      Console.WriteLine( "After clearing the collection:" );
      PrintValues1( myCol );

   }

   // Uses the foreach statement which hides the complexity of the enumerator.
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintValues1( StringCollection myCol )  {
      foreach ( Object obj in myCol )
         Console.WriteLine( "   {0}", obj );
      Console.WriteLine();
   }

   // Uses the enumerator. 
   // NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
   public static void PrintValues2( StringCollection myCol )  {
      StringEnumerator myEnumerator = myCol.GetEnumerator();
      while ( myEnumerator.MoveNext() )
         Console.WriteLine( "   {0}", myEnumerator.Current );
      Console.WriteLine();
   }

   // Uses the Count and Item properties.
   public static void PrintValues3( StringCollection myCol )  {
      for ( int i = 0; i < myCol.Count; i++ )
         Console.WriteLine( "   {0}", myCol[i] );
      Console.WriteLine();
   }

}

/*
This code produces the following output.

Displays the elements using foreach:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

Displays the elements using the IEnumerator:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

Displays the elements using the Count and Item properties:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

After adding "* white" to the end and inserting "* gray" at index 3:
   RED
   orange
   yellow
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing "yellow":
   RED
   orange
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing all occurrences of "RED":
   orange
   * gray
   green
   blue
   indigo
   violet
   * white

The new array contains:
   [0] orange
   [1] * gray
   [2] green
   [3] blue
   [4] indigo
   [5] violet
   [6] * white

After clearing the collection:

*/

#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;

void PrintValues1( StringCollection^ myCol );
void PrintValues2( StringCollection^ myCol );
void PrintValues3( StringCollection^ myCol );

int main()
{
   
   // Create and initializes a new StringCollection.
   StringCollection^ myCol = gcnew StringCollection;
   
   // Add a range of elements from an array to the end of the StringCollection.
   array<String^>^myArr = {"RED","orange","yellow","RED","green","blue","RED","indigo","violet","RED"};
   myCol->AddRange( myArr );
   
   // Display the contents of the collection using for each. This is the preferred method.
   Console::WriteLine( "Displays the elements using for each:" );
   PrintValues1( myCol );

   // Display the contents of the collection using the enumerator.
   Console::WriteLine( "Displays the elements using the IEnumerator:" );
   PrintValues2( myCol );
   
   // Display the contents of the collection using the Count and Item properties.
   Console::WriteLine( "Displays the elements using the Count and Item properties:" );
   PrintValues3( myCol );
   
   // Add one element to the end of the StringCollection and insert another at index 3.
   myCol->Add( "* white" );
   myCol->Insert( 3, "* gray" );
   Console::WriteLine( "After adding \"* white\" to the end and inserting \"* gray\" at index 3:" );
   PrintValues1( myCol );
   
   // Remove one element from the StringCollection.
   myCol->Remove( "yellow" );
   Console::WriteLine( "After removing \"yellow\":" );
   PrintValues1( myCol );
   
   // Remove all occurrences of a value from the StringCollection.
   int i = myCol->IndexOf( "RED" );
   while ( i > -1 )
   {
      myCol->RemoveAt( i );
      i = myCol->IndexOf( "RED" );
   }

   
   // Verify that all occurrences of "RED" are gone.
   if ( myCol->Contains( "RED" ) )
      Console::WriteLine( "*** The collection still contains \"RED\"." );

   Console::WriteLine( "After removing all occurrences of \"RED\":" );
   PrintValues1( myCol );
   
   // Copy the collection to a new array starting at index 0.
   array<String^>^myArr2 = gcnew array<String^>(myCol->Count);
   myCol->CopyTo( myArr2, 0 );
   Console::WriteLine( "The new array contains:" );
   for ( i = 0; i < myArr2->Length; i++ )
   {
      Console::WriteLine( "   [{0}] {1}", i, myArr2[ i ] );

   }
   Console::WriteLine();
   
   // Clears the entire collection.
   myCol->Clear();
   Console::WriteLine( "After clearing the collection:" );
   PrintValues1( myCol );
}


// Uses the for each statement which hides the complexity of the enumerator.
// NOTE: The for each statement is the preferred way of enumerating the contents of a collection.
void PrintValues1( StringCollection^ myCol )  {
   for each ( Object^ obj in myCol )
      Console::WriteLine( "   {0}", obj );
   Console::WriteLine();
}

// Uses the enumerator. 
void PrintValues2( StringCollection^ myCol )
{
   StringEnumerator^ myEnumerator = myCol->GetEnumerator();
   while ( myEnumerator->MoveNext() )
      Console::WriteLine( "   {0}", myEnumerator->Current );

   Console::WriteLine();
}


// Uses the Count and Item properties.
void PrintValues3( StringCollection^ myCol )
{
   for ( int i = 0; i < myCol->Count; i++ )
      Console::WriteLine( "   {0}", myCol[ i ] );
   Console::WriteLine();
}

/*
This code produces the following output.

Displays the elements using the IEnumerator:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

Displays the elements using the Count and Item properties:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

After adding "* white" to the end and inserting "* gray" at index 3:
   RED
   orange
   yellow
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing "yellow":
   RED
   orange
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing all occurrences of "RED":
   orange
   * gray
   green
   blue
   indigo
   violet
   * white

The new array contains:
   [0] orange
   [1] * gray
   [2] green
   [3] blue
   [4] indigo
   [5] violet
   [6] * white

After clearing the collection:

*/

import System.* ;
import System.Collections.* ;
import System.Collections.Specialized.* ;

public class SamplesStringCollection
{
    public static void main(String[] args)
    {
        // Create and initializes a new StringCollection.
        StringCollection myCol = new StringCollection();

        // Add a range of elements from an array to the end of the
        // StringCollection.
        String myArr[] = new String[] {    "RED", "orange", "yellow", "RED", 
            "green", "blue", "RED", "indigo", "violet", "RED" };

        myCol.AddRange(myArr);

        // Display the contents of the collection using foreach. This is the 
        // preferred method.
        Console.WriteLine("Displays the elements using for:");
        PrintValues1(myCol);

        // Display the contents of the collection using the enumerator.
        Console.WriteLine("Displays the elements using the IEnumerator:");
        PrintValues2(myCol);

        // Display the contents of the collection using the Count and Item 
        // properties.
        Console.WriteLine("Displays the elements using the Count and Item" 
            + " properties:");
        PrintValues3(myCol);

        // Add one element to the end of the StringCollection and insert 
        // another at index 3.
        myCol.Add("* white");
        myCol.Insert(3, "* gray");
        Console.WriteLine("After adding \"* white\" to the end and inserting" 
            + " \"* gray\" at index 3:");
        PrintValues1(myCol);

        // Remove one element from the StringCollection.
        myCol.Remove("yellow");
        Console.WriteLine("After removing \"yellow\":");
        PrintValues1(myCol);

        // Remove all occurrences of a value from the StringCollection.
        int i = myCol.IndexOf("RED");
        while (i > -1) {
            myCol.RemoveAt(i);
            i = myCol.IndexOf("RED");
        }

        // Verify that all occurrences of "RED" are gone.
        if (myCol.Contains("RED")) {
            Console.WriteLine("*** The collection still contains \"RED\".");
        }

        Console.WriteLine("After removing all occurrences of \"RED\":");
        PrintValues1(myCol);

        // Copy the collection to a new array starting at index 0.
        String myArr2[] = new String[myCol.get_Count()];

        myCol.CopyTo(myArr2, 0);
        Console.WriteLine("The new array contains:");
        for (i = 0; i < myArr2.length; i++) {
            Console.WriteLine("   [{0}] {1}", System.Convert.ToString(i), 
                myArr2.get_Item(i));
        }

        Console.WriteLine();

        // Clears the entire collection.
        myCol.Clear();
        Console.WriteLine("After clearing the collection:");
        PrintValues1(myCol);
    } //main

    public static void PrintValues1(StringCollection myCol)
    {
        Object obj = new Object();

        for (int iCtr = 0; iCtr < myCol.get_Count(); iCtr++) {
            obj = myCol.get_Item(iCtr);
            Console.WriteLine("   {0}", obj);
        }

        Console.WriteLine();
    } //PrintValues1

    // Uses the enumerator. 
    public static void PrintValues2(StringCollection myCol)
    {
        StringEnumerator myEnumerator = myCol.GetEnumerator();

        while (myEnumerator.MoveNext()) {
            Console.WriteLine("   {0}", myEnumerator.get_Current());
        }

        Console.WriteLine();
    } //PrintValues2

    // Uses the Count and Item properties.
    public static void PrintValues3(StringCollection myCol)
    {
        for (int i = 0; i < myCol.get_Count(); i++) {
            Console.WriteLine("   {0}", myCol.get_Item(i));
        }

        Console.WriteLine();
    } //PrintValues3
} //SamplesStringCollection
 
/*
This code produces the following output.

Displays the elements using for:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

Displays the elements using the IEnumerator:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

Displays the elements using the Count and Item properties:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

After adding "* white" to the end and inserting "* gray" at index 3:
   RED
   orange
   yellow
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing "yellow":
   RED
   orange
   * gray
   RED
   green
   blue
   RED
   indigo
   violet
   RED
   * white

After removing all occurrences of "RED":
   orange
   * gray
   green
   blue
   indigo
   violet
   * white

The new array contains:
   [0] orange
   [1] * gray
   [2] green
   [3] blue
   [4] indigo
   [5] violet
   [6] * white

After clearing the collection:

*/

상속 계층 구조

System.Object
System.Collections.Specialized.StringCollection
System.Configuration.CommaDelimitedStringCollection

스레드로부터의 안전성

이 형식의 public static(Visual Basic의 경우 Shared) 멤버는 스레드로부터 안전합니다. 모든 인스턴스 멤버는 스레드로부터 안전하지 않을 수 있습니다.

이렇게 구현하면 StringCollection에 대해 동기화되어 스레드로부터 안전하게 보호되는 래퍼가 제공되지 않지만 파생 클래스에서는 SyncRoot 속성을 사용하여 StringCollection의 자체 동기화 버전을 만들 수 있습니다.

컬렉션을 열거하는 프로시저는 기본적으로 스레드로부터 안전하지 않습니다. 컬렉션이 동기화되어 있을 때 다른 스레드에서 해당 컬렉션을 수정할 수 있으므로 이렇게 되면 열거자에서 예외가 throw됩니다. 열거하는 동안 스레드로부터 안전을 보장하려면 전체 열거를 수행하는 동안 컬렉션을 잠그거나 다른 스레드에서 변경된 내용으로 인해 발생한 예외를 catch하면 됩니다.

플랫폼

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.

다음을 통해 공유

StringCollection 클래스

구문

설명

예제

상속 계층 구조

스레드로부터의 안전성

플랫폼

버전 정보

.NET Framework

참고 항목

참조

기타 리소스

추가 리소스