C# Dictionnary读取键值

using System;
using System.Collections.Generic;

class DictionaryDemo
{
    static void Main(string[] args)
    {
        DictionaryDemo001();
        Console.ReadLine();

        DictionaryDemo002();
        Console.ReadLine();

        DictionaryDemo003();
        Console.ReadLine();
    }

    /// 

    /// 一般用法
    /// 
    static void DictionaryDemo001()
    {
        Dictionary dict = new Dictionary();
        dict.Add(1, "111");
        dict.Add(2, "222");

        //判断是否存在相应的key并显示
        if (dict.ContainsKey(2))
        {
            Console.WriteLine(dict[2]);
        }

        //遍历Keys
        foreach (var item in dict.Keys)
        {
            Console.WriteLine("Key:{0}", item);
        }

        //遍历Values
        foreach (var item in dict.Values)
        {
            Console.WriteLine("value:{0}", item);
        }

        //遍历整个字典
        foreach (var item in dict)
        {
            Console.WriteLine("key:{0} value:{1}", item.Key, item.Value);
        }
    }

    /// 

    /// 参数为其它类型
    /// 
    static void DictionaryDemo002()
    {
        Dictionary dict = new Dictionary();
        dict.Add("1", "1,11,111".Split(','));
        dict.Add("2", "2,22,222".Split(','));
        Console.WriteLine(dict["2"][2]);
    }

    /// 

    /// 调用自定义类
    /// 
    static void DictionaryDemo003()
    {
        Dictionary dict = new Dictionary();
        for (int i = 0; i < 10; i++)
        {
            yongfa365 y = new yongfa365();
            y.UserCode = i;
            y.UserName = "www.yongfa365.com " + i.ToString();
            dict.Add(i, y);
        }
        foreach (var item in dict)
        {
            Console.WriteLine("{0} One:{1} UserName:{2}", item.Key, item.Value.UserCode, item.Value.UserName);
        }
    }
}

class yongfa365
{
    public int UserCode { get; set; }
    public string UserName { get; set; }

}

基本用法：

            dic.Add()：添加数据
            dic.Clear：清空所有元素
            dic.ContainsKey(键名)：判断是否包含键名
            dic.Count：获得总个数
            dic.GetType()：获得类型
            dic.Keys：所有键的集合
            dic.Max()：求Dictionary的最大值
            dic.Min()：求Dictionary的最小值
            dic.Remove(键名)：移除指定键的名和值
            dic.Reverse()：反转
            dic.Sum()：求Dictionary的和
            dic.ToArray()：转换为数组
            dic.ToList()：转换为List
            dic.ToString()：转换为字符串
            dic.Values：所有值的集合

                       

var element = dicSort.ElementAt(0)这个获取到的整个字典的索引号为几的键和值

string keys = element.Key;指定索引0的键

int a = dicSort.ElementAt(0).Value;指定索引0的值