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HybridDictionary.CopyTo Method

Copies the HybridDictionary entries to a one-dimensional Array instance at the specified index.

Namespace: System.Collections.Specialized
Assembly: System (in system.dll)

public void CopyTo (
	Array array,
	int index
)
public final void CopyTo (
	Array array, 
	int index
)
public final function CopyTo (
	array : Array, 
	index : int
)
Not applicable.

Parameters

array

The one-dimensional Array that is the destination of the DictionaryEntry objects copied from HybridDictionary. The Array must have zero-based indexing.

index

The zero-based index in array at which copying begins.

Exception typeCondition

ArgumentNullException

array is a null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

index is less than zero.

ArgumentException

array is multidimensional.

-or-

arrayIndex is equal to or greater than the length of array.

-or-

The number of elements in the source HybridDictionary is greater than the available space from arrayIndex to the end of the destination array.

InvalidCastException

The type of the source HybridDictionary cannot be cast automatically to the type of the destination array.

The elements are copied to the Array in the same order in which the enumerator iterates through the HybridDictionary.

To copy only the keys in the HybridDictionary, use HybridDictionary.Keys.CopyTo.

To copy only the values in the HybridDictionary, use HybridDictionary.Values.CopyTo.

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

The following code example copies the elements of a HybridDictionary to an array.

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

public class SamplesHybridDictionary  {

   public static void Main()  {

      // Creates and initializes a new HybridDictionary.
      HybridDictionary myCol = new HybridDictionary();
      myCol.Add( "Braeburn Apples", "1.49" );
      myCol.Add( "Fuji Apples", "1.29" );
      myCol.Add( "Gala Apples", "1.49" );
      myCol.Add( "Golden Delicious Apples", "1.29" );
      myCol.Add( "Granny Smith Apples", "0.89" );
      myCol.Add( "Red Delicious Apples", "0.99" );
      myCol.Add( "Plantain Bananas", "1.49" );
      myCol.Add( "Yellow Bananas", "0.79" );
      myCol.Add( "Strawberries", "3.33" );
      myCol.Add( "Cranberries", "5.98" );
      myCol.Add( "Navel Oranges", "1.29" );
      myCol.Add( "Grapes", "1.99" );
      myCol.Add( "Honeydew Melon", "0.59" );
      myCol.Add( "Seedless Watermelon", "0.49" );
      myCol.Add( "Pineapple", "1.49" );
      myCol.Add( "Nectarine", "1.99" );
      myCol.Add( "Plums", "1.69" );
      myCol.Add( "Peaches", "1.99" );

      // Displays the values in the HybridDictionary in three different ways.
      Console.WriteLine( "Initial contents of the HybridDictionary:" );
      PrintKeysAndValues( myCol );

      // Copies the HybridDictionary to an array with DictionaryEntry elements.
      DictionaryEntry[] myArr = new DictionaryEntry[myCol.Count];
      myCol.CopyTo( myArr, 0 );

      // Displays the values in the array.
      Console.WriteLine( "Displays the elements in the array:" );
      Console.WriteLine( "   KEY                       VALUE" );
      for ( int i = 0; i < myArr.Length; i++ )
         Console.WriteLine( "   {0,-25} {1}", myArr[i].Key, myArr[i].Value );
      Console.WriteLine();

   }

   public static void PrintKeysAndValues( IDictionary myCol )  {
      Console.WriteLine( "   KEY                       VALUE" );
      foreach ( DictionaryEntry de in myCol )
         Console.WriteLine( "   {0,-25} {1}", de.Key, de.Value );
      Console.WriteLine();
   }

}

/*
This code produces the following output.

Initial contents of the HybridDictionary:
   KEY                       VALUE
   Seedless Watermelon       0.49
   Nectarine                 1.99
   Cranberries               5.98
   Plantain Bananas          1.49
   Honeydew Melon            0.59
   Pineapple                 1.49
   Strawberries              3.33
   Grapes                    1.99
   Braeburn Apples           1.49
   Peaches                   1.99
   Red Delicious Apples      0.99
   Golden Delicious Apples   1.29
   Yellow Bananas            0.79
   Granny Smith Apples       0.89
   Gala Apples               1.49
   Plums                     1.69
   Navel Oranges             1.29
   Fuji Apples               1.29

Displays the elements in the array:
   KEY                       VALUE
   Seedless Watermelon       0.49
   Nectarine                 1.99
   Cranberries               5.98
   Plantain Bananas          1.49
   Honeydew Melon            0.59
   Pineapple                 1.49
   Strawberries              3.33
   Grapes                    1.99
   Braeburn Apples           1.49
   Peaches                   1.99
   Red Delicious Apples      0.99
   Golden Delicious Apples   1.29
   Yellow Bananas            0.79
   Granny Smith Apples       0.89
   Gala Apples               1.49
   Plums                     1.69
   Navel Oranges             1.29
   Fuji Apples               1.29

*/

import System.* ;
import System.Collections.*;
import System.Collections.Specialized.*;

public class SamplesHybridDictionary
{
    public static void main(String[] args)
    {
        // Creates and initializes a new HybridDictionary.
        HybridDictionary myCol =  new HybridDictionary();
        myCol.Add("Braeburn Apples", "1.49");
        myCol.Add("Fuji Apples", "1.29");
        myCol.Add("Gala Apples", "1.49");
        myCol.Add("Golden Delicious Apples", "1.29");
        myCol.Add("Granny Smith Apples", "0.89");
        myCol.Add("Red Delicious Apples", "0.99");
        myCol.Add("Plantain Bananas", "1.49");
        myCol.Add("Yellow Bananas", "0.79");
        myCol.Add("Strawberries", "3.33");
        myCol.Add("Cranberries", "5.98");
        myCol.Add("Navel Oranges", "1.29");
        myCol.Add("Grapes", "1.99");
        myCol.Add("Honeydew Melon", "0.59");
        myCol.Add("Seedless Watermelon", "0.49");
        myCol.Add("Pineapple", "1.49");
        myCol.Add("Nectarine", "1.99");
        myCol.Add("Plums", "1.69");
        myCol.Add("Peaches", "1.99");
          
        // Displays the values in the HybridDictionary in three different ways.
        Console.WriteLine("Initial contents of the HybridDictionary:");
        PrintKeysAndValues(myCol);
          
        // Copies the HybridDictionary to an array with DictionaryEntry 
        // elements.
        DictionaryEntry myArr[] = new DictionaryEntry[myCol.get_Count()];
        myCol.CopyTo(myArr, 0);
          
        // Displays the values in the array.
        Console.WriteLine("Displays the elements in the array:");
        Console.WriteLine("   KEY                       VALUE");
        for(int i=0;i < myArr.length;i++) {
            Console.WriteLine("   {0,-25} {1}", myArr[i].get_Key(), 
                myArr[i].get_Value());
        } 
        Console.WriteLine();
   } //main
    
   public static void PrintKeysAndValues(IDictionary myCol) 
   {
        IEnumerator objEnum = myCol.GetEnumerator();
        Console.WriteLine("   KEY                       VALUE");
        while (objEnum.MoveNext()) {
            DictionaryEntry de = (DictionaryEntry)objEnum.get_Current();
            Console.WriteLine("   {0,-25} {1}", de.get_Key(), de.get_Value());
        }
        Console.WriteLine();
   } //PrintKeysAndValues
} //SamplesHybridDictionary
 
/*
This code produces the following output.

Initial contents of the HybridDictionary:
   KEY                       VALUE
   Strawberries              3.33
   Yellow Bananas            0.79
   Cranberries               5.98
   Grapes                    1.99
   Granny Smith Apples       0.89
   Seedless Watermelon       0.49
   Honeydew Melon            0.59
   Red Delicious Apples      0.99
   Navel Oranges             1.29
   Fuji Apples               1.29
   Plantain Bananas          1.49
   Gala Apples               1.49
   Pineapple                 1.49
   Plums                     1.69
   Braeburn Apples           1.49
   Peaches                   1.99
   Golden Delicious Apples   1.29
   Nectarine                 1.99

Displays the elements in the array:
   KEY                       VALUE
   Strawberries              3.33
   Yellow Bananas            0.79
   Cranberries               5.98
   Grapes                    1.99
   Granny Smith Apples       0.89
   Seedless Watermelon       0.49
   Honeydew Melon            0.59
   Red Delicious Apples      0.99
   Navel Oranges             1.29
   Fuji Apples               1.29
   Plantain Bananas          1.49
   Gala Apples               1.49
   Pineapple                 1.49
   Plums                     1.69
   Braeburn Apples           1.49
   Peaches                   1.99
   Golden Delicious Apples   1.29
   Nectarine                 1.99

*/

Windows 98, Windows Server 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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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