C#中的SortedDictionary.Clear()方法
C#中的SortedDictionary.Clear()方法用于从SortedDictionary<TKey，TValue>中删除所有元素。
语法
语法如下-
public void Clear ();
示例
现在让我们看一个例子-
using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
public static void Main(){
SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();
sortedDict.Add(100, "Mobile");
sortedDict.Add(200, "Laptop");
sortedDict.Add(300, "Desktop");
sortedDict.Add(400, "Speakers");
sortedDict.Add(500, "Headphone");
sortedDict.Add(600, "Earphone");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);
Console.WriteLine("\nThe SortedDictionary has the key 200? = "+sortedDict.ContainsKey(200));
sortedDict.Clear();
Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);
}
}输出结果
这将产生以下输出-
SortedDictionary key-value pairs... Key = 100, Value = Mobile Key = 200, Value = Laptop Key = 300, Value = Desktop Key = 400, Value = Speakers Key = 500, Value = Headphone Key = 600, Value = Earphone Count of SortedDictionary key-value pairs = 6 The SortedDictionary has the key 200? = True Count of SortedDictionary key-value pairs = 0
示例
现在让我们来看另一个示例-
using System;
using System.Collections;
using System.Collections.Generic;
public class Demo {
public static void Main(){
SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();
sortedDict.Add(100, "Inspiron");
sortedDict.Add(200, "Alienware");
sortedDict.Add(300, "Projectors");
sortedDict.Add(400, "XPS");
Console.WriteLine("SortedDictionary key-value pairs...");
IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);
sortedDict.Add(800, "Notebook");
sortedDict.Add(10000, "Bluetooth Speaker");
Console.WriteLine("\nSortedDictionary key-value pairs...UPDATED");
demoEnum = sortedDict.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
Console.WriteLine("Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
sortedDict.Clear();
Console.WriteLine("\nCount of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);
}
}输出结果
这将产生以下输出-
SortedDictionary key-value pairs... Key = 100, Value = Inspiron Key = 200, Value = Alienware Key = 300, Value = Projectors Key = 400, Value = XPS Count of SortedDictionary key-value pairs = 4 SortedDictionary key-value pairs...UPDATED Key = 100, Value = Inspiron Key = 200, Value = Alienware Key = 300, Value = Projectors Key = 400, Value = XPS Key = 800, Value = Notebook Key = 10000, Value = Bluetooth Speaker Count of SortedDictionary key-value pairs (UPDATED) = 6 Count of SortedDictionary key-value pairs (UPDATED) = 0