此方法用于从SortedDictionary
句法:
public bool Remove (TKey key);
返回值:如果成功找到并删除了元素,则此方法返回true;否则,返回true。否则返回false 。如果在SortedDictionary中找不到密钥,则此方法返回false。
异常:如果键为null,则此方法将提供ArgumentNullException。
下面是说明上述方法的用法的程序:
范例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 myDict =
new SortedDictionary();
// 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);
}
}
输出:
Total key/value pairs in myDict are : 6
After remove operation
Total key/value pairs in myDict are : 5
范例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 myDict =
new SortedDictionary();
// 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);
}
}
输出:
Total key/value pairs in myDict are : 4
After remove operation
Total key/value pairs in myDict are : 3
参考:
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.generic.sorteddictionary-2.remove?view=netframework-4.7.2