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SortedList.SetByIndex Method

Replaces the value at a specific index in a SortedList object.

Namespace:  System.Collections
Assembly:  mscorlib (in mscorlib.dll)

public virtual void SetByIndex(
	int index,
	Object value
)

Parameters

index
Type: System.Int32

The zero-based index at which to save value.

value
Type: System.Object

The Object to save into the SortedList object. The value can be null.

ExceptionCondition
ArgumentOutOfRangeException

index is outside the range of valid indexes for the SortedList object.

The index sequence is based on the sort sequence. When an element is added, it is inserted into SortedList in the correct sort order, and the indexing adjusts accordingly. When an element is removed, the indexing also adjusts accordingly. Therefore, the index of a specific key/value pair might change as elements are added or removed from the SortedList object.

This method is an O(1) operation.

The following code example shows how to replace the value of an existing element in a SortedList object.

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
*/

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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