C#之键值对

1  //初始化定义一个键值对，注意最后的括号
2  Dictionary<int, string> dic = new Dictionary<int, string>();

1 //键值对的Add函数
2 dic.Add(2, "zhao");
3 dic.Add(4, "qian");
4 dic.Add(6, "sun");
5 dic.Add(8, "li");

1 //键值对的ContainsKey和ContainsValue函数
2 Console.WriteLine(dic[4]);
3 Console.WriteLine("键值对是否包含键2：" + dic.ContainsKey(2));
4 Console.WriteLine("键值对是否包含键5：" + dic.ContainsKey(5));
5 Console.WriteLine("键值对是否包含值zhao：" + dic.ContainsValue("zhao"));
6 Console.WriteLine("键值对是否包含值Zhao：" + dic.ContainsValue("Zhao"));

1 //键值对的数量
2 Console.WriteLine("键值对包含键值数量：" + dic.Count);

1 //键值对的keys属性
2 foreach (int item in dic.Keys)
3 {
4     Console.WriteLine("键为：{0}，值为：{1}", item, dic[item]);
5 }

1 //对键值对进行遍历
2 foreach (KeyValuePair<int,string> kv in dic)
3 {
4     Console.WriteLine("键为：{0}，值为：{1}", kv.Key, kv.Value);
5 }