C#中通过单例模式以及Dictionary实现键值对的映射，通过key获取value

本是古典何须时尚 2023-10-06 09:56 62阅读 0赞

## 场景 ##

有时候我们获取的是key，比如获取的是12345这样的数字，要实现对应的value比如是中文的状态的映射。

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## 实现 ##

首先新建一个工具类，这里是StepStateHelper,然后设置其单例实现

然后定义一个私有的Dicktionary类型的字段，定义好键值对的映射关系

private Dictionary<short, string> _dicStepStates = new Dictionary<short, string>()
            {
                { 0x04, "霸道" },
                { 0x05, "流氓" },
                { 0x06, "气质" },
    
    
            };

键值对的内容根据自己的需要去确定

然后再定义一个public的属性用来对上面字段进行获取

public Dictionary<short, string> DicStepStates
            {
                get
                {
                    return _dicStepStates;
                }
            }

完整示例代码

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace Badao.Entity.Helper
    {
        public class StepStateHelper
        {
            #region 单例实现
    
            private static string _lockFlag = "StepStateHelperLock";
            private static StepStateHelper _instance;
    
            private StepStateHelper()
            {
    
            }
    
            public static StepStateHelper Instance
            {
                get
                {
                    lock(_lockFlag)
                    {
                        if (_instance == null)
                        {
                            _instance = new StepStateHelper();
                        }
                        return _instance;
                    }
                }
            }
    
            #endregion
    
            #region 字段定义
    
            private Dictionary<short, string> _dicStepStates = new Dictionary<short, string>()
            {
                { 0x04, "霸道" },
                { 0x05, "流氓" },
                { 0x06, "气质" },
    
    
            };
    
    
            #endregion
    
            #region 属性定义
    
    
            public Dictionary<short, string> DicStepStates
            {
                get
                {
                    return _dicStepStates;
                }
            }
    
    
            #endregion
    
    
    
        }
    }

然后就可以在代码中通过

string StepState = "";
    StepStateHelper.Instance.DicStepStates.TryGetValue((short)obj, out StepState);

去通过key即obj来获取value即StepState

[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi