StringCollection.RemoveAt(Int32) 메서드

정의

네임스페이스:

System.Collections.Specialized

어셈블리:

System.Collections.Specialized.dll

Source:

StringCollection.cs

StringCollection의 지정한 인덱스에 있는 문자열을 제거합니다.

public:
 virtual void RemoveAt(int index);

public void RemoveAt (int index);

abstract member RemoveAt : int -> unit
override this.RemoveAt : int -> unit

Public Sub RemoveAt (index As Integer)

매개 변수

index

Int32

제거할 문자열의 인덱스이며 0부터 시작합니다.

구현

RemoveAt(Int32)

예외

ArgumentOutOfRangeException

index가 0보다 작은 경우

또는

index가 Count보다 크거나 같은 경우

예제

다음 코드 예제에서는 에서 요소를 제거 합니다 StringCollection.

#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;
void PrintValues( IEnumerable^ myCol );
int main()
{
   
   // Creates and initializes a new StringCollection.
   StringCollection^ myCol = gcnew StringCollection;
   array<String^>^myArr = {"RED","orange","yellow","RED","green","blue","RED","indigo","violet","RED"};
   myCol->AddRange( myArr );
   Console::WriteLine( "Initial contents of the StringCollection:" );
   PrintValues( myCol );
   
   // Removes one element from the StringCollection.
   myCol->Remove( "yellow" );
   Console::WriteLine( "After removing \"yellow\":" );
   PrintValues( myCol );
   
   // Removes all occurrences of a value from the StringCollection.
   int i = myCol->IndexOf( "RED" );
   while ( i > -1 )
   {
      myCol->RemoveAt( i );
      i = myCol->IndexOf( "RED" );
   }

   Console::WriteLine( "After removing all occurrences of \"RED\":" );
   PrintValues( myCol );
   
   // Clears the entire collection.
   myCol->Clear();
   Console::WriteLine( "After clearing the collection:" );
   PrintValues( myCol );
}

void PrintValues( IEnumerable^ myCol )
{
   IEnumerator^ myEnum = myCol->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::WriteLine( "   {0}", obj );
   }

   Console::WriteLine();
}

/*
This code produces the following output.

Initial contents of the StringCollection:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

After removing "yellow":
   RED
   orange
   RED
   green
   blue
   RED
   indigo
   violet
   RED

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

After clearing the collection:

*/

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

public class SamplesStringCollection  {

   public static void Main()  {

      // Creates and initializes a new StringCollection.
      StringCollection myCol = new StringCollection();
      String[] myArr = new String[] { "RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED" };
      myCol.AddRange( myArr );

      Console.WriteLine( "Initial contents of the StringCollection:" );
      PrintValues( myCol );

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

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

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

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

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

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

   public static void PrintValues( IEnumerable myCol )  {
      foreach ( Object obj in myCol )
         Console.WriteLine( "   {0}", obj );
      Console.WriteLine();
   }
}

/*
This code produces the following output.

Initial contents of the StringCollection:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

After removing "yellow":
   RED
   orange
   RED
   green
   blue
   RED
   indigo
   violet
   RED

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

After clearing the collection:

*/

Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesStringCollection   

   Public Shared Sub Main()

      ' Creates and initializes a new StringCollection.
      Dim myCol As New StringCollection()
      Dim myArr() As [String] = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}
      myCol.AddRange(myArr)

      Console.WriteLine("Initial contents of the StringCollection:")
      PrintValues(myCol)

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

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

      ' Removes 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

      Console.WriteLine("After removing all occurrences of ""RED"":")
      PrintValues(myCol)

      ' Clears the entire collection.
      myCol.Clear()

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

   End Sub

   Public Shared Sub PrintValues(myCol As IEnumerable)
      Dim obj As [Object]
      For Each obj In  myCol
         Console.WriteLine("   {0}", obj)
      Next obj
      Console.WriteLine()
   End Sub

End Class


'This code produces the following output.
'
'Initial contents of the StringCollection:
'   RED
'   orange
'   yellow
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'After removing "yellow":
'   RED
'   orange
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'After removing all occurrences of "RED":
'   orange
'   green
'   blue
'   indigo
'   violet
'
'After clearing the collection:
'

설명

목록처럼 연속된 요소로 구성된 컬렉션에서는 제거된 요소 다음에 있는 요소를 위로 이동하여 빈 자리를 채웁니다. 컬렉션에 인덱스가 지정된 경우 이동되는 요소의 인덱스도 업데이트됩니다. 요소가 해시 테이블 같은 버킷으로 개념적으로 그룹화되어 있는 컬렉션에는 이러한 동작이 적용되지 않습니다.

이 메서드는 O (n) 작업, 여기서 n 는 Count합니다.