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

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。

注：

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https://blog.csdn.net/badao_liumang_qizhi
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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

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

 

    }
}

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