此方法用于从SortedDictionary
句法:
public void Clear ();
下面是说明上述方法的用法的程序:
范例1:
// C# code to remove all pairs
// from 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 all pairs from the Dictionary
myDict.Clear();
Console.WriteLine("After clear 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 clear operation
Total key/value pairs in myDict are : 0
范例2:
// C# code to remove all pairs
// from SortedDictionary
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Create a new SortedDictionary of
// int, 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 all pairs from the Dictionary
myDict.Clear();
Console.WriteLine("After clear 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 clear operation
Total key/value pairs in myDict are : 0
参考:
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.generic.sorteddictionary-2.clear?view=netframework-4.7.2