StringDictionary.CopyTo(Array, Int32) Method

Definition

Namespace:

System.Collections.Specialized

Assemblies:

netstandard.dll, System.Collections.Specialized.dll

Source:

StringDictionary.cs

Copies the string dictionary values to a one-dimensional Array instance at the specified index.

C#

public virtual void CopyTo(Array array, int index);

Parameters

array

Array

The one-dimensional Array that is the destination of the values copied from the StringDictionary.

index

Int32

The index in the array where copying begins.

Exceptions

ArgumentException

array is multidimensional.

-or-

The number of elements in the StringDictionary is greater than the available space from index to the end of array.

ArgumentNullException

array is null.

ArgumentOutOfRangeException

index is less than the lower bound of array.

Examples

The following code example shows how a StringDictionary can be copied to an array.

C#

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

public class SamplesStringDictionary  {

   public static void Main()  {

      // Creates and initializes a new StringDictionary.
      StringDictionary myCol = new StringDictionary();
      myCol.Add( "red", "rojo" );
      myCol.Add( "green", "verde" );
      myCol.Add( "blue", "azul" );

      // Displays the values in the StringDictionary.
      Console.WriteLine( "KEYS\tVALUES in the StringDictionary" );
      foreach ( DictionaryEntry myDE in myCol )
         Console.WriteLine( "{0}\t{1}", myDE.Key, myDE.Value );
      Console.WriteLine();

      // Creates an array with DictionaryEntry elements.
      DictionaryEntry[] myArr = { new DictionaryEntry(), new DictionaryEntry(), new DictionaryEntry() };

      // Copies the StringDictionary to the array.
      myCol.CopyTo( myArr, 0 );

      // Displays the values in the array.
      Console.WriteLine( "KEYS\tVALUES in the array" );
      for ( int i = 0; i < myArr.Length; i++ )
         Console.WriteLine( "{0}\t{1}", myArr[i].Key, myArr[i].Value );
      Console.WriteLine();
   }
}

/*
This code produces the following output.

KEYS    VALUES in the StringDictionary
green   verde
red     rojo
blue    azul

KEYS    VALUES in the array
green   verde
red     rojo
blue    azul

*/

Remarks

CopyTo copies objects that can be typecast to System.Collections.DictionaryEntry. DictionaryEntry contains both the key and the value.

The elements copied to the Array are sorted in the same order that the enumerator iterates through the StringDictionary.

This method is an O(n) operation, where n is Count.

Applies to