共用方式為


SortedList.SetByIndex(Int32, Object) 方法

定義

取代 SortedList 物件中特定索引處的值。

public:
 virtual void SetByIndex(int index, System::Object ^ value);
public virtual void SetByIndex (int index, object value);
public virtual void SetByIndex (int index, object? value);
abstract member SetByIndex : int * obj -> unit
override this.SetByIndex : int * obj -> unit
Public Overridable Sub SetByIndex (index As Integer, value As Object)

參數

index
Int32

要儲存 value 的地方的以零起始的索引。

value
Object

要儲存到 Object 物件中的 SortedList。 這個值可以是 null

例外狀況

indexSortedList 物件的有效索引範圍之外。

範例

下列程式代碼範例示範如何取代 對象中 SortedList 現有元素的值。

#using <system.dll>

using namespace System;
using namespace System::Collections;
void PrintIndexAndKeysAndValues( SortedList^ myList )
{
   Console::WriteLine( "\t-INDEX-\t-KEY-\t-VALUE-" );
   for ( int i = 0; i < myList->Count; i++ )
   {
      Console::WriteLine( "\t[{0}]:\t{1}\t{2}", i, myList->GetKey( i ), myList->GetByIndex( i ) );

   }
   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new SortedList.
   SortedList^ mySL = gcnew SortedList;
   mySL->Add( 2, "two" );
   mySL->Add( 3, "three" );
   mySL->Add( 1, "one" );
   mySL->Add( 0, "zero" );
   mySL->Add( 4, "four" );
   
   // Displays the values of the SortedList.
   Console::WriteLine( "The SortedList contains the following values:" );
   PrintIndexAndKeysAndValues( mySL );
   
   // Replaces the values at index 3 and index 4.
   mySL->SetByIndex( 3, "III" );
   mySL->SetByIndex( 4, "IV" );
   
   // Displays the updated values of the SortedList.
   Console::WriteLine( "After replacing the value at index 3 and index 4," );
   PrintIndexAndKeysAndValues( mySL );
}

/*
This code produces the following output.

The SortedList contains the following values:
        -INDEX- -KEY-   -VALUE-
        [0]:    0       zero
        [1]:    1       one
        [2]:    2       two
        [3]:    3       three
        [4]:    4       four

After replacing the value at index 3 and index 4,
        -INDEX- -KEY-   -VALUE-
        [0]:    0       zero
        [1]:    1       one
        [2]:    2       two
        [3]:    3       III
        [4]:    4       IV
*/
using System;
using System.Collections;
public class SamplesSortedList  {

   public static void Main()  {

      // Creates and initializes a new SortedList.
      SortedList mySL = new SortedList();
      mySL.Add( 2, "two" );
      mySL.Add( 3, "three" );
      mySL.Add( 1, "one" );
      mySL.Add( 0, "zero" );
      mySL.Add( 4, "four" );

      // Displays the values of the SortedList.
      Console.WriteLine( "The SortedList contains the following values:" );
      PrintIndexAndKeysAndValues( mySL );

      // Replaces the values at index 3 and index 4.
      mySL.SetByIndex( 3, "III" );
      mySL.SetByIndex( 4, "IV" );

      // Displays the updated values of the SortedList.
      Console.WriteLine( "After replacing the value at index 3 and index 4," );
      PrintIndexAndKeysAndValues( mySL );
   }

   public static void PrintIndexAndKeysAndValues( SortedList myList )  {
      Console.WriteLine( "\t-INDEX-\t-KEY-\t-VALUE-" );
      for ( int i = 0; i < myList.Count; i++ )  {
         Console.WriteLine( "\t[{0}]:\t{1}\t{2}", i, myList.GetKey(i), myList.GetByIndex(i) );
      }
      Console.WriteLine();
   }
}
/*
This code produces the following output.

The SortedList contains the following values:
    -INDEX-    -KEY-    -VALUE-
    [0]:    0    zero
    [1]:    1    one
    [2]:    2    two
    [3]:    3    three
    [4]:    4    four

After replacing the value at index 3 and index 4,
    -INDEX-    -KEY-    -VALUE-
    [0]:    0    zero
    [1]:    1    one
    [2]:    2    two
    [3]:    3    III
    [4]:    4    IV
*/
Imports System.Collections

Public Class SamplesSortedList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new SortedList.
        Dim mySL As New SortedList()
        mySL.Add(2, "two")
        mySL.Add(3, "three")
        mySL.Add(1, "one")
        mySL.Add(0, "zero")
        mySL.Add(4, "four")
        
        ' Displays the values of the SortedList.
        Console.WriteLine("The SortedList contains the following" & _
           "values:")
        PrintIndexAndKeysAndValues(mySL)
        
        ' Replaces the values at index 3 and index 4.
        mySL.SetByIndex(3, "III")
        mySL.SetByIndex(4, "IV")
        
        ' Displays the updated values of the SortedList.
        Console.WriteLine("After replacing the value at index 3 and index 4,")
        PrintIndexAndKeysAndValues(mySL)
    End Sub
    
    
    
    Public Shared Sub PrintIndexAndKeysAndValues(myList As SortedList)
        Console.WriteLine(ControlChars.Tab & "-INDEX-" & ControlChars.Tab & _
           "-KEY-" & ControlChars.Tab & "-VALUE-")
        Dim i As Integer
        For i = 0 To myList.Count - 1
            Console.WriteLine(ControlChars.Tab & "[{0}]:" & ControlChars.Tab & _
               "{1}" & ControlChars.Tab & "{2}", i, myList.GetKey(i), _
               myList.GetByIndex(i))
        Next i
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
' The SortedList contains the following values:
'     -INDEX-    -KEY-    -VALUE-
'     [0]:    0    zero
'     [1]:    1    one
'     [2]:    2    two
'     [3]:    3    three
'     [4]:    4    four
' 
' After replacing the value at index 3 and index 4,
'     -INDEX-    -KEY-    -VALUE-
'     [0]:    0    zero
'     [1]:    1    one
'     [2]:    2    two
'     [3]:    3    III
'     [4]:    4    IV

備註

索引序列是以排序順序為基礎。 新增專案時,它會以正確的排序順序插入 , SortedList 而且索引編製會據以調整。 拿掉專案時,索引也會據以調整。 因此,當加入或移除物件時,特定索引鍵/值組的 SortedList 索引可能會變更。

這個方法是 O(1) 作業。

適用於

另請參閱