C#中的Dictionary.Clear方法
C#中的Dictionary.Clear()方法从Dictionary<TKey，TValue>中删除所有键/值对。
语法
public void Clear();
现在让我们看一个实现Dictionary.Clear()方法的示例-
示例
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
Dictionary<string, string> dict =
new Dictionary<string, string>();
dict.Add("One", "John");
dict.Add("Two", "Tom");
dict.Add("Three", "Jacob");
dict.Add("Four", "Kevin");
dict.Add("Five", "Nathan");
Console.WriteLine("Count of elements = "+dict.Count);
Console.WriteLine("\nKey/value pairs...");
foreach(KeyValuePair<string, string> res in dict){
Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
}
dict.Clear();
Console.WriteLine("Cleared Key/value pairs...");
foreach(KeyValuePair<string, string> res in dict){
Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
}
Console.WriteLine("Count of elements now = "+dict.Count);
}
}输出结果
这将产生以下输出-
Count of elements = 5 Key/value pairs... Key = One, Value = John Key = Two, Value = Tom Key = Three, Value = Jacob Key = Four, Value = Kevin Key = Five, Value = Nathan Cleared Key/value pairs... Count of elements now = 0
现在让我们来看另一个实现Dictionary.Clear()方法的示例-
示例
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
Dictionary<string, string> dict =
new Dictionary<string, string>();
dict.Add("One", "John");
dict.Add("Two", "Tom");
dict.Add("Three", "Jacob");
dict.Add("Four", "Kevin");
dict.Add("Five", "Nathan");
Console.WriteLine("Count of elements = "+dict.Count);
dict.Add("Six", "Anne");
dict.Add("Seven", "Katoe");
Console.WriteLine("Count of elements (updated) = "+dict.Count);
Console.WriteLine("Key/value pairs...");
foreach(KeyValuePair<string, string> res in dict){
Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
}
dict.Clear();
Console.WriteLine("Cleared Key/value pairs...");
foreach(KeyValuePair<string, string> res in dict){
Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
}
}
}输出结果
这将产生以下输出-
Count of elements = 5 Count of elements (updated) = 7 Key/value pairs... Key = One, Value = John Key = Two, Value = Tom Key = Three, Value = Jacob Key = Four, Value = Kevin Key = Five, Value = Nathan Key = Six, Value = Anne Key = Seven, Value = Katoe Cleared Key/value pairs...
热门推荐
1 如何训练狗狗不叫
2 训练狗狗不叫
3 训练狗狗随行
4 怎么训练狗狗不叫
7 训练比熊狗狗教程
10 上海狗狗训练
11 怎么训练狗狗上厕所
12 训练狗狗趴下
13 狗狗服从训练
14 训练狗狗拒食
15 训练狗狗笑
16 训练狗狗大便
17 训练狗狗立
18 训练狗狗捡东西