C# 程式訪問字典中的第一個元素
以下是包含一些元素的字典 −
Dictionary<int, string> d = new Dictionary<int, string>() {
{1,"Electronics"},
{2, "Clothing"},
{3,"Toys"},
{4,"Footwear"},
{5, "Accessories"}
};現在要顯示第一個元素,請像這樣設定鍵。
d[1];
上述顯示第一個元素。
示例
using System;
using System.Collections.Generic;
public class Program {
public static void Main() {
Dictionary<int, string> d = new Dictionary<int, string>() {
{1,"Electronics"},
{2, "Clothing"},
{3,"Toys"},
{4,"Footwear"},
{5, "Accessories"}
};
foreach (KeyValuePair<int, string> ele in d) {
Console.WriteLine("Key = {0}, Value = {1}", ele.Key, ele.Value);
}
Console.WriteLine("First element: "+d[1]);
}
}輸出
Key = 1, Value = Electronics Key = 2, Value = Clothing Key = 3, Value = Toys Key = 4, Value = Footwear Key = 5, Value = Accessories First element: Electronics
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