Hashtable.Remove 메서드
Hashtable에서 지정한 키를 가지는 요소를 제거합니다.
네임스페이스: System.Collections
어셈블리: mscorlib(mscorlib.dll)
구문
‘선언
Public Overridable Sub Remove ( _
key As Object _
)
‘사용 방법
Dim instance As Hashtable
Dim key As Object
instance.Remove(key)
public virtual void Remove (
Object key
)
public:
virtual void Remove (
Object^ key
)
public void Remove (
Object key
)
public function Remove (
key : Object
)
매개 변수
- key
제거할 요소의 키입니다.
예외
| 예외 형식 | 조건 |
|---|---|
key가 Null 참조(Visual Basic의 경우 Nothing)인 경우 |
|
Hashtable가 읽기 전용인 경우 - 또는 - Hashtable의 크기가 고정되어 있는 경우 |
설명
Hashtable에 지정한 키를 가지는 요소가 없으면 Hashtable는 변경되지 않은 상태로 유지됩니다. 예외가 throw되지 않습니다.
이 메서드는 O(1) 연산입니다.
예제
다음 예제에서는 Hashtable에서 요소를 제거하는 방법을 설명합니다.
Imports System
Imports System.Collections
Imports Microsoft.VisualBasic
Public Class SamplesHashtable
Public Shared Sub Main()
' Creates and initializes a new Hashtable.
Dim myHT As New Hashtable()
myHT.Add("1a", "The")
myHT.Add("1b", "quick")
myHT.Add("1c", "brown")
myHT.Add("2a", "fox")
myHT.Add("2b", "jumped")
myHT.Add("2c", "over")
myHT.Add("3a", "the")
myHT.Add("3b", "lazy")
myHT.Add("3c", "dog")
' Displays the Hashtable.
Console.WriteLine("The Hashtable initially contains the following:")
PrintKeysAndValues(myHT)
' Removes the element with the key "3b".
myHT.Remove("3b")
' Displays the current state of the Hashtable.
Console.WriteLine("After removing ""lazy"":")
PrintKeysAndValues(myHT)
End Sub
Public Shared Sub PrintKeysAndValues(myHT As Hashtable)
Dim de As DictionaryEntry
For Each de In myHT
Console.WriteLine(" {0}: {1}", de.Key, de.Value)
Next de
Console.WriteLine()
End Sub
End Class
' This code produces the following output.
'
'The Hashtable initially contains the following:
' 2c: over
' 3a: the
' 2b: jumped
' 3b: lazy
' 1b: quick
' 3c: dog
' 2a: fox
' 1c: brown
' 1a: The
'
'After removing "lazy":
' 2c: over
' 3a: the
' 2b: jumped
' 1b: quick
' 3c: dog
' 2a: fox
' 1c: brown
' 1a: The
using System;
using System.Collections;
public class SamplesHashtable {
public static void Main() {
// Creates and initializes a new Hashtable.
Hashtable myHT = new Hashtable();
myHT.Add( "1a", "The" );
myHT.Add( "1b", "quick" );
myHT.Add( "1c", "brown" );
myHT.Add( "2a", "fox" );
myHT.Add( "2b", "jumped" );
myHT.Add( "2c", "over" );
myHT.Add( "3a", "the" );
myHT.Add( "3b", "lazy" );
myHT.Add( "3c", "dog" );
// Displays the Hashtable.
Console.WriteLine( "The Hashtable initially contains the following:" );
PrintKeysAndValues( myHT );
// Removes the element with the key "3b".
myHT.Remove( "3b" );
// Displays the current state of the Hashtable.
Console.WriteLine( "After removing \"lazy\":" );
PrintKeysAndValues( myHT );
}
public static void PrintKeysAndValues( Hashtable myHT ) {
foreach ( DictionaryEntry de in myHT )
Console.WriteLine( " {0}: {1}", de.Key, de.Value );
Console.WriteLine();
}
}
/*
This code produces the following output.
The Hashtable initially contains the following:
2c: over
3a: the
2b: jumped
3b: lazy
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
After removing "lazy":
2c: over
3a: the
2b: jumped
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
*/
using namespace System;
using namespace System::Collections;
void PrintKeysAndValues( Hashtable^ myHT );
int main()
{
// Creates and initializes a new Hashtable.
Hashtable^ myHT = gcnew Hashtable;
myHT->Add( "1a", "The" );
myHT->Add( "1b", "quick" );
myHT->Add( "1c", "brown" );
myHT->Add( "2a", "fox" );
myHT->Add( "2b", "jumped" );
myHT->Add( "2c", "over" );
myHT->Add( "3a", "the" );
myHT->Add( "3b", "lazy" );
myHT->Add( "3c", "dog" );
// Displays the Hashtable.
Console::WriteLine( "The Hashtable initially contains the following:" );
PrintKeysAndValues( myHT );
// Removes the element with the key "3b".
myHT->Remove( "3b" );
// Displays the current state of the Hashtable.
Console::WriteLine( "After removing \"lazy\":" );
PrintKeysAndValues( myHT );
}
void PrintKeysAndValues( Hashtable^ myHT )
{
IEnumerator^ myEnum = myHT->GetEnumerator();
while ( myEnum->MoveNext() )
{
DictionaryEntry de = *safe_cast<DictionaryEntry ^>(myEnum->Current);
Console::WriteLine( " {0}: {1}", de.Key, de.Value );
}
Console::WriteLine();
}
/*
This code produces the following output.
The Hashtable initially contains the following:
2c: over
3a: the
2b: jumped
3b: lazy
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
After removing "lazy":
2c: over
3a: the
2b: jumped
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
*/
import System.*;
import System.Collections.*;
public class SamplesHashtable
{
public static void main(String[] args)
{
// Creates and initializes a new Hashtable.
Hashtable myHT = new Hashtable();
myHT.Add("1a", "The");
myHT.Add("1b", "quick");
myHT.Add("1c", "brown");
myHT.Add("2a", "fox");
myHT.Add("2b", "jumped");
myHT.Add("2c", "over");
myHT.Add("3a", "the");
myHT.Add("3b", "lazy");
myHT.Add("3c", "dog");
// Displays the Hashtable.
Console.WriteLine("The Hashtable initially contains the following:");
PrintKeysAndValues(myHT);
// Removes the element with the key "3b".
myHT.Remove("3b");
// Displays the current state of the Hashtable.
Console.WriteLine("After removing \"lazy\":");
PrintKeysAndValues(myHT);
} //main
public static void PrintKeysAndValues(Hashtable myHT)
{
IEnumerator myEnumerator = myHT.GetEnumerator();
while (myEnumerator.MoveNext()) {
DictionaryEntry de = (DictionaryEntry)myEnumerator.get_Current();
Console.WriteLine(" {0}: {1}", de.get_Key(), de.get_Value());
}
Console.WriteLine();
} //PrintKeysAndValues
} //SamplesHashtable
/*
This code produces the following output.
The Hashtable initially contains the following:
2c: over
3a: the
2b: jumped
3b: lazy
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
After removing "lazy":
2c: over
3a: the
2b: jumped
1b: quick
3c: dog
2a: fox
1c: brown
1a: The
*/
import System
import System.Collections
import Microsoft.VisualBasic
// Creates and initializes a new Hashtable.
var myHT : Hashtable = new Hashtable()
myHT.Add("1a", "The")
myHT.Add("1b", "quick")
myHT.Add("1c", "brown")
myHT.Add("2a", "fox")
myHT.Add("2b", "jumped")
myHT.Add("2c", "over")
myHT.Add("3a", "the")
myHT.Add("3b", "lazy")
myHT.Add("3c", "dog")
// Displays the Hashtable.
Console.WriteLine("The Hashtable initially contains the following:")
PrintKeysAndValues(myHT)
// Removes the element with the key "3b".
myHT.Remove("3b")
// Displays the current state of the Hashtable.
Console.WriteLine("After removing \"lazy\":")
PrintKeysAndValues(myHT)
function PrintKeysAndValues(myList : Hashtable){
var myEnumerator : IDictionaryEnumerator = myList.GetEnumerator()
Console.WriteLine("\t-KEY-\t-VALUE-")
while(myEnumerator.MoveNext())
Console.WriteLine("\t{0}:\t{1}", myEnumerator.Key, myEnumerator.Value)
Console.WriteLine()
}
// This code produces the following output.
//
// The Hashtable initially contains the following:
// -KEY- -VALUE-
// 3a: the
// 3c: dog
// 3b: lazy
// 1c: brown
// 1b: quick
// 1a: The
// 2a: fox
// 2b: jumped
// 2c: over
//
// After removing "lazy":
// -KEY- -VALUE-
// 3a: the
// 3c: dog
// 1c: brown
// 1b: quick
// 1a: The
// 2a: fox
// 2b: jumped
// 2c: over
플랫폼
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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.
버전 정보
.NET Framework
2.0, 1.1, 1.0에서 지원
.NET Compact Framework
2.0, 1.0에서 지원
참고 항목
참조
Hashtable 클래스
Hashtable 멤버
System.Collections 네임스페이스
Add
IDictionary.Remove