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  • C#学习笔记——字典

    C# Dictionary字典类的使用方法

               //定义字典
                    Dictionary<string, string> d = new Dictionary<string, string>();
    
                    //添加字典的元素
                    for (int i = 0; i < 5; i++)
                    {
                        d.Add("key" + i, "value" + i);
                    }
    
                    //取值/赋值
                    string val = d["key1"];
                    d["key1"] = "new value";
    
                    //遍历key
                    foreach (string key in d.Keys)
                    {
                        Console.WriteLine("Key = {0}", key);
                    }
                    //遍历value
                    foreach (string v in d.Values)
                    {
                        Console.WriteLine("value = {0}", v);
                    }
    
                    //遍历value, Second Method
                    Dictionary<string, string>.ValueCollection valueColl = d.Values;
                    foreach (string s in valueColl)
                    {
                        Console.WriteLine("Second Method, Value = {0}", s);
                    }
    
                    //遍历字典
                    foreach (KeyValuePair<string, string> kvp in d)
                    {
                        Console.WriteLine("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
                    }
                    //删除元素
                    d.Remove("key1");
                    if (!d.ContainsKey("key1"))
                    {
                        Console.WriteLine("Key "key1" is not found.");
                    }
                    //判断键存在
                    if (d.ContainsKey("key1")) // True 
                    {
                        Console.WriteLine("An element with Key = "key1" exists.");
                    }
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  • 原文地址:https://www.cnblogs.com/eve612/p/15108915.html
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