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法律研究如何在 C# 中獲得對 ListDictionary 的同步訪問權？
要獲得對 ListDictionary 的同步訪問權，程式碼如下 −
示例
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
ListDictionary dict = new ListDictionary();
dict.Add("1", "SUV");
dict.Add("2", "Sedan");
dict.Add("3", "Utility Vehicle");
dict.Add("4", "Compact Car");
dict.Add("5", "SUV");
dict.Add("6", "Sedan");
dict.Add("7", "Utility Vehicle");
dict.Add("8", "Compact Car");
dict.Add("9", "Crossover");
dict.Add("10", "Electric Car");
Console.WriteLine("ListDictionary elements...");
foreach(DictionaryEntry d in dict) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("
Is the ListDictionary having fixed size? = "+dict.IsFixedSize);
Console.WriteLine("If ListDictionary read-only? = "+dict.IsReadOnly);
Console.WriteLine("Is ListDictionary synchronized = "+dict.IsSynchronized);
Console.WriteLine("The ListDictionary has the key K? = "+dict.Contains("K"));
Console.WriteLine("The ListDictionary has the key 9? = "+dict.Contains("9"));
Console.WriteLine("
Synchronize access...");
lock(dict.SyncRoot) {
foreach(DictionaryEntry d in dict) {
Console.WriteLine(d.Key + " " + d.Value);
}
}
}
}輸出
將會產生以下輸出 −
ListDictionary elements... 1 SUV 2 Sedan 3 Utility Vehicle 4 Compact Car 5 SUV 6 Sedan 7 Utility Vehicle 8 Compact Car 9 Crossover 10 Electric Car Is the ListDictionary having fixed size? = False If ListDictionary read-only? = False Is ListDictionary synchronized = False The ListDictionary has the key K? = False The ListDictionary has the key 9? = True Synchronize access... 1 SUV 2 Sedan 3 Utility Vehicle 4 Compact Car 5 SUV 6 Sedan 7 Utility Vehicle 8 Compact Car 9 Crossover 10 Electric Car
示例
我們來看另一個示例 −
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
ListDictionary dict = new ListDictionary();
dict.Add("A", "Books");
dict.Add("B", "Electronics");
dict.Add("C", "Appliances");
dict.Add("D", "Pet Supplies");
dict.Add("E", "Clothing");
dict.Add("F", "Footwear");
Console.WriteLine("Synchronize access...");
lock(dict.SyncRoot) {
foreach(DictionaryEntry d in dict) {
Console.WriteLine(d.Key + " " + d.Value);
}
}
}
}輸出
將會產生以下輸出 −
Synchronize access... A Books B Electronics C Appliances D Pet Supplies E Clothing F Footwear
更新於: 16-Dec-2019
119 次瀏覽
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