C# 中的 Dictionary.Add() 方法
csharpserver side programmingprogramming更新于 2025/11/26 11:14:00
C# 中的 Dictionary.Add() 方法用于向字典中添加指定的键和值。
语法
以下是语法 −
public void Add (TKey key, TValue val);
上面，key 参数是键，而 Val 是元素的值。
示例
现在让我们看一个实现 Dictionary.Add() 方法的示例 −
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("Key/value pairs...");
foreach(KeyValuePair<string, string> res in dict){
Console.WriteLine("Key = {0}, Value = {1}", res.Key, res.Value);
}
}
}
输出
这将产生以下输出 −
Key/value pairs... Key = One, Value = John Key = Two, Value = Tom Key = Three, Value = Jacob Key = Four, Value = Kevin Key = Five, Value = Nathan
示例
现在让我们看另一个实现 Dictionary.Add() 方法的示例 −
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", "Katie");
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);
}
}
}
输出
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 = Katie
