C# 中的 Dictionary.Remove() 方法
csharpserver side programmingprogramming更新于 2025/11/26 10:12:00
C# 中的 Dictionary.Remove() 属性用于从 Dictionary<TKey, TValue> 中删除具有指定键的值。
语法
以下是语法 −
public bool Remove (TKey key);
上面，键是要删除的键。
示例
现在让我们看一个实现 Dictionary.Remove() 属性的示例 −
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
Dictionary<string, string> dict =
new Dictionary<string, string>();
dict.Add("One", "Kagido");
dict.Add("Two", "Ngidi");
dict.Add("Three", "Devillers");
dict.Add("Four", "Smith");
dict.Add("Five", "Warner");
Console.WriteLine("Count of elements = "+dict.Count);
Console.WriteLine("Removing some keys...");
dict.Remove("Four");
dict.Remove("Five");
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);
}
Console.Write("
All the keys..
");
Dictionary<string, string>.KeyCollection allKeys = dict.Keys;
foreach(string str in allKeys){
Console.WriteLine("Key = {0}", str);
}
}
}
输出
这将产生以下输出 −
Count of elements = 5 Removing some keys... Count of elements (updated) = 3 Key/value pairs... Key = One, Value = Kagido Key = Two, Value = Ngidi Key = Three, Value = Devillers All the keys.. Key = One Key = Two Key = Three
示例
现在让我们看另一个实现 Dictionary.Remove() 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", "Kagido");
dict.Add("Two", "Ngidi");
dict.Add("Three", "Devillers");
dict.Add("Four", "Smith");
dict.Add("Five", "Warner");
Console.WriteLine("Count of elements = "+dict.Count);
Console.Write("
All the keys..
");
Dictionary<string, string>.KeyCollection allKeys = dict.Keys;
foreach(string str in allKeys){
Console.WriteLine("Key = {0}", str);
}
Console.WriteLine("Removing some keys...");
dict.Remove("Four");
dict.Remove("Five");
Console.WriteLine("Count of elements (updated) = "+dict.Count);
Console.Write("
All the keys..updated
");
foreach(string str in allKeys){
Console.WriteLine("Key = {0}", str);
}
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 All the keys.. Key = One Key = Two Key = Three Key = Four Key = Five Removing some keys... Count of elements (updated) = 3 All the keys..updated Key = One Key = Two Key = Three Key/value pairs... Key = One, Value = Kagido Key = Two, Value = Ngidi Key = Three, Value = Devillers
