El método ListDictionary.Clear se utiliza para eliminar todas las entradas del ListDictionary.
Sintaxis:
public void Clear ();
A continuación se dan algunos ejemplos para entender la implementación de una mejor manera:
Ejemplo 1:
// C# code to remove all entries
// from the ListDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a ListDictionary named myDict
ListDictionary myDict = new ListDictionary();
// Adding key/value pairs in myDict
myDict.Add("Australia", "Canberra");
myDict.Add("Belgium", "Brussels");
myDict.Add("Netherlands", "Amsterdam");
myDict.Add("China", "Beijing");
myDict.Add("Russia", "Moscow");
myDict.Add("India", "New Delhi");
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs in myDict are : "
+ myDict.Count);
// Displaying the key/value pairs in myDict
Console.WriteLine("The key/value pairs in myDict are : ");
foreach(DictionaryEntry de in myDict)
{
Console.WriteLine(de.Key + " " + de.Value);
}
// Removing all entries from the ListDictionary
myDict.Clear();
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs in myDict are : "
+ myDict.Count);
// Displaying the key/value pairs in myDict
Console.WriteLine("The key/value pairs in myDict are : ");
foreach(DictionaryEntry de in myDict)
{
Console.WriteLine(de.Key + " " + de.Value);
}
}
}
Producción:
Total key/value pairs in myDict are : 6 The key/value pairs in myDict are : Australia Canberra Belgium Brussels Netherlands Amsterdam China Beijing Russia Moscow India New Delhi Total key/value pairs in myDict are : 0 The key/value pairs in myDict are :
Ejemplo 2:
// C# code to remove all entries
// from the ListDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a ListDictionary named myDict
ListDictionary myDict = new ListDictionary();
// Adding key/value pairs in myDict
myDict.Add("I", "first");
myDict.Add("II", "second");
myDict.Add("III", "third");
myDict.Add("IV", "fourth");
myDict.Add("V", "fifth");
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs in myDict are : "
+ myDict.Count);
// Displaying the key/value pairs in myDict
Console.WriteLine("The key/value pairs in myDict are : ");
foreach(DictionaryEntry de in myDict)
{
Console.WriteLine(de.Key + " " + de.Value);
}
// Removing all entries from the ListDictionary
myDict.Clear();
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs in myDict are : "
+ myDict.Count);
// Displaying the key/value pairs in myDict
Console.WriteLine("The key/value pairs in myDict are : ");
foreach(DictionaryEntry de in myDict)
{
Console.WriteLine(de.Key + " " + de.Value);
}
}
}
Producción:
Total key/value pairs in myDict are : 5 The key/value pairs in myDict are : I first II second III third IV fourth V fifth Total key/value pairs in myDict are : 0 The key/value pairs in myDict are :
Nota:
- Count se establece en cero y también se liberan las referencias a otros objetos de los elementos de la colección.
- Este método es una operación O(1).
Referencia:
Publicación traducida automáticamente
Artículo escrito por Sahil_Bansall y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA