C# | Get an enumerator that iterates through the SortedList
SortedList.GetEnumerator Method is used to an IDictionaryEnumerator object that iterates through a SortedList object.
Syntax:
public virtual System.Collections.IDictionaryEnumerator GetEnumerator ();
Return Value: This method returns an IDictionaryEnumerator object for the SortedList object.
Below programs illustrate the use of above discussed method:
Example 1:
using System;
using System.Collections;
class Geeks {
public static void Main(String[] args)
{
SortedList mylist = new SortedList();
mylist.Add( "1" , "C++" );
mylist.Add( "2" , "Java" );
mylist.Add( "3" , "DSA" );
mylist.Add( "4" , "Python" );
mylist.Add( "5" , "C#" );
IDictionaryEnumerator myEnumerator =
mylist.GetEnumerator();
while (myEnumerator.MoveNext())
Console.WriteLine(myEnumerator.Key + " --> "
+ myEnumerator.Value);
}
}
|
Output:
1 --> C++
2 --> Java
3 --> DSA
4 --> Python
5 --> C#
Example 2:
using System;
using System.Collections;
class Geeks {
public static void Main(String[] args)
{
SortedList mylist = new SortedList();
mylist.Add( "Australia" , "Canberra" );
mylist.Add( "Belgium" , "Brussels" );
mylist.Add( "Netherlands" , "Amsterdam" );
mylist.Add( "China" , "Beijing" );
mylist.Add( "Russia" , "Moscow" );
mylist.Add( "India" , "New Delhi" );
IDictionaryEnumerator myEnumerator =
mylist.GetEnumerator();
while (myEnumerator.MoveNext())
Console.WriteLine(myEnumerator.Key + " --> "
+ myEnumerator.Value);
}
}
|
Output:
Australia --> Canberra
Belgium --> Brussels
China --> Beijing
India --> New Delhi
Netherlands --> Amsterdam
Russia --> Moscow
Note:
- The foreach statement of the C# language hides the complexity of the enumerators. Therefore, using foreach is recommended, instead of directly manipulating the enumerator.
- Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection.
- Current returns the same object until either MoveNext or Reset is called. MoveNext sets Current to the next element.
- An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is irrecoverably invalidated and its behavior is undefined.
- This method is an O(1) operation.
Reference:
Last Updated :
01 Feb, 2019
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