ภาพรวม
HybridDictionary (ใน System.Collections.Specialized) สลับระหว่าง ListDictionary และ Hashtable อัตโนมัติ ขึ้นกับขนาด เมธอด Contains(Object key) ตรวจสอบคีย์
ตัวอย่าง 1: ตรวจสอบคีย์ C
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
HybridDictionary dict = new HybridDictionary(5);
dict.Add("A", "AB");
dict.Add("B", "BC");
dict.Add("C", "DE");
dict.Add("D", "FG");
dict.Add("E", "HI");
Console.WriteLine("Key/Value pairs...");
foreach (DictionaryEntry d in dict) {
Console.WriteLine("Key = " + d.Key + ", Value = " + d.Value);
}
Console.WriteLine("Does HybridDictionary contains the key C? = " + dict.Contains("C"));
}
}
ผลลัพธ์ตัวอย่าง 1
Key/Value pairs... Key = A, Value = AB Key = B, Value = BC Key = C, Value = DE Key = D, Value = FG Key = E, Value = HI Does HybridDictionary contains the key C? = True
ตัวอย่าง 2: หลาย Dictionary และ Clear
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
HybridDictionary dict1 = new HybridDictionary();
dict1.Add("A", "Books");
dict1.Add("B", "Electronics");
dict1.Add("C", "Smart Wearables");
dict1.Add("D", "Pet Supplies");
dict1.Add("E", "Clothing");
dict1.Add("F", "Footwear");
Console.WriteLine("HybridDictionary1 elements...");
foreach (DictionaryEntry d in dict1) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of Key/value pairs in Dictionary1 = " + dict1.Count);
HybridDictionary dict2 = new HybridDictionary();
dict2.Add("1", "One");
dict2.Add("2", "Two");
dict2.Add("3", "Three");
dict2.Add("4", "Four");
dict2.Add("5", "Five");
dict2.Add("6", "Six");
Console.WriteLine("\nHybridDictionary2 elements...");
foreach (DictionaryEntry d in dict2) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of Key/value pairs in Dictionary2 = " + dict1.Count);
Console.WriteLine("Does HybridDictionary2 contains the key 10? = " + dict2.Contains(10));
dict2.Clear();
Console.WriteLine("Count of Key/value pairs in Dictionary2 (Updated) = " + dict2.Count);
}
}
ผลลัพธ์ตัวอย่าง 2
HybridDictionary1 elements... A Books B Electronics C Smart Wearables D Pet Supplies E Clothing F Footwear Count of Key/value pairs in Dictionary1 = 6 HybridDictionary2 elements... 1 One 2 Two 3 Three 4 Four 5 Five 6 Six Count of Key/value pairs in Dictionary2 = 6 Does HybridDictionary2 contains the key 10? = False Count of Key/value pairs in Dictionary2 (Updated) = 0
สรุป
Contains(key)ทำงานเหมือน Hashtable/ListDictionary- HybridDictionary เลือกโครงสร้างภายในอัตโนมัติ
- เหมาะสำหรับขนาดไม่แน่นอน
