C# | SortedDictionary。移除()方法
原文:https://www . geeksforgeeks . org/c-sharp-sorted dictionary-remove-method/
此方法用于从排序字典< TKey、TVaLue>T1 中删除带有指定键的值。
语法:
public bool Remove (TKey key);
返回值:如果成功找到并移除元素，此方法返回true；否则返回假。如果在 SortedDictionary 中没有找到关键字，该方法返回 false 。
异常:如果键为空，该方法将给出参数异常。
以下是说明上述方法使用的程序:
例 1:
// C# code to remove the entry with
// the specified key from the
// SortedDictionary
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Create a new dictionary of
// strings, with string keys.
SortedDictionary<string, string> myDict =
new SortedDictionary<string, string>();
// 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);
// Remove the entry with the specified
// key from the Dictionary
myDict.Remove("Russia");
Console.WriteLine("After remove operation");
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs"
+ " in myDict are : " + myDict.Count);
}
}
Output:
Total key/value pairs in myDict are : 6
After remove operation
Total key/value pairs in myDict are : 5
例 2:
// C# code to remove the entry with
// the specified key from the
// SortedDictionary
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Create a new SortedDictionary
// of ints, with int keys.
SortedDictionary<int, int> myDict =
new SortedDictionary<int, int>();
// Adding key/value pairs in myDict
myDict.Add(9, 8);
myDict.Add(3, 4);
myDict.Add(4, 7);
myDict.Add(1, 7);
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs "
+ "in myDict are : " + myDict.Count);
// Remove the entry with the specified
// key from the Dictionary
myDict.Remove(9);
Console.WriteLine("After remove operation");
// To get count of key/value pairs in myDict
Console.WriteLine("Total key/value pairs in"
+ " myDict are : " + myDict.Count);
}
}
Output:
Total key/value pairs in myDict are : 4
After remove operation
Total key/value pairs in myDict are : 3
参考:
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