Dictionary<TKey, TValue>.IDictionary.Values Property

Gets an ICollection containing the values in the IDictionary.

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

Syntax

'Declaration
Private ReadOnly Property Values As ICollection
    Implements IDictionary.Values
ICollection IDictionary.Values { get; }

Property Value

Type: System.Collections.ICollection
An ICollection containing the values in the IDictionary.

Implements

IDictionary.Values

Remarks

The order of the values in the returned ICollection is unspecified, but it is guaranteed to be the same order as the corresponding keys in the ICollection returned by the Keys property.

Getting the value of this property is an O(1) operation.

Examples

The following code example shows how to use the IDictionary.Values property of the System.Collections.IDictionary interface with a Dictionary<TKey, TValue>, to list the values in the dictionary. The example also shows how to enumerate the key/value pairs in the dictionary; note that the enumerator for the System.Collections.IDictionary interface returns DictionaryEntry objects rather than KeyValuePair<TKey, TValue> objects.

The code example is part of a larger example, including output, provided for the IDictionary.Add method.

Imports System.Collections
Imports System.Collections.Generic

Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      ' Create a new dictionary of strings, with string keys,
      ' and access it using the IDictionary interface.
      '
      Dim openWith As IDictionary = _
          New Dictionary(Of String, String)

      ' Add some elements to the dictionary. There are no 
      ' duplicate keys, but some of the values are duplicates.
      ' IDictionary.Add throws an exception if incorrect types
      ' are supplied for key or value.
      openWith.Add("txt", "notepad.exe")
      openWith.Add("bmp", "paint.exe")
      openWith.Add("dib", "paint.exe")
      openWith.Add("rtf", "wordpad.exe")


...


' To get the values alone, use the Values property.
Dim icoll As ICollection = openWith.Values

' The elements of the collection are strongly typed
' with the type that was specified for dictionary values,
' even though the ICollection interface is not strongly
' typed.
outputBlock.Text &= vbCrLf
For Each s As String In icoll
   outputBlock.Text &= String.Format("Value = {0}", s) & vbCrLf
Next s


...


' When you use foreach to enumerate dictionary elements
' with the IDictionary interface, the elements are retrieved
' as DictionaryEntry objects instead of KeyValuePair objects.
outputBlock.Text &= vbCrLf
For Each de As DictionaryEntry In openWith
   outputBlock.Text &= String.Format("Key = {0}, Value = {1}", _
       de.Key, de.Value) & vbCrLf
Next


...



   End Sub

End Class
using System;
using System.Collections;
using System.Collections.Generic;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Create a new dictionary of strings, with string keys,
      // and access it using the IDictionary interface.
      //
      IDictionary openWith = new Dictionary<string, string>();

      // Add some elements to the dictionary. There are no 
      // duplicate keys, but some of the values are duplicates.
      // IDictionary.Add throws an exception if incorrect types
      // are supplied for key or value.
      openWith.Add("txt", "notepad.exe");
      openWith.Add("bmp", "paint.exe");
      openWith.Add("dib", "paint.exe");
      openWith.Add("rtf", "wordpad.exe");


...


// To get the values alone, use the Values property.
ICollection icoll = openWith.Values;

// The elements of the collection are strongly typed
// with the type that was specified for dictionary values,
// even though the ICollection interface is not strongly
// typed.
outputBlock.Text += "\n";
foreach (string s in icoll)
{
   outputBlock.Text += String.Format("Value = {0}", s) + "\n";
}


...


// When you use foreach to enumerate dictionary elements
// with the IDictionary interface, the elements are retrieved
// as DictionaryEntry objects instead of KeyValuePair objects.
outputBlock.Text += "\n";
foreach (DictionaryEntry de in openWith)
{
   outputBlock.Text += String.Format("Key = {0}, Value = {1}",
       de.Key, de.Value) + "\n";
}


...


   }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.