El método ListDictionary.Remove(Object) se usa para eliminar la entrada con la clave especificada del ListDictionary.
Sintaxis:
public void Remove (object key);
Aquí, clave es la clave de la entrada que se va a eliminar.
Excepción: este método dará ArgumentNullException si la clave es nula.
A continuación se muestran los ejemplos para ilustrar el uso del método ListDictionary.Remove(Object) :
Ejemplo 1:
// C# code to remove the entry with
// the specified key 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);
}
// Remove the entry with the specified
// key from the ListDictionary
myDict.Remove("Russia");
// 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 : 5 The key/value pairs in myDict are : Australia Canberra Belgium Brussels Netherlands Amsterdam China Beijing India New Delhi
Ejemplo 2:
// C# code to remove the entry with
// the specified key 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);
}
// Remove the entry with the specified
// key from the ListDictionary
// This should raise "ArgumentNullException"
// as the key is null
myDict.Remove(null);
// 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);
}
}
}
Error de tiempo de ejecución:
Excepción no controlada:
System.ArgumentNullException: la clave no puede ser nula.
Nombre del parámetro: clave
Nota:
- Si ListDictionary no contiene un elemento con la clave especificada, ListDictionary permanece sin cambios. No se lanza ninguna excepción.
- Este método es una operación O(n), donde n es Count.
Referencia :
Publicación traducida automáticamente
Artículo escrito por Sahil_Bansall y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA