详解C#对Dictionary内容的通用操作

 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace Utils
{
    public class DictionaryHelper
    {
        /// <summary>
        /// 添加信息到字典中
        /// </summary>
        /// <typeparam name="TKEy">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="key">需添加的键</param>
        /// <param name="value">需添加的值</param>
        public static void AddInfoToDic<TKey, TValue>(Dictionary<TKey, TValue> dic, TKey key, TValue value)
        {
            if (dic == null)
            {
                dic = new Dictionary<TKey, TValue>();
            }
 
            if (dic.ContainsKey(key))
            {
                dic[key] = value;
            }
            else
            {
                dic.Add(key, value);
            }
        }
 
        /// <summary>
        /// 根据键获取值
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="key">键</param>
        /// <returns>返回键对应的值</returns>
        public static TValue GetValueOfKey<TKey, TValue>(Dictionary<TKey, TValue> dic, TKey key)
        {
            TValue tmpValue = default(TValue);
            if (dic != null && dic.Count > 0)
            {
                if (dic.ContainsKey(key))
                {
                    tmpValue = dic[key];
                }
            }
            return tmpValue;
        }
 
 
        /// <summary>
        /// 根据值获取键
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="value">值</param>
        /// <returns>返回值对应的所有键</returns>
        public static List<TKey> GetKeyOfValue<TKey, TValue>(Dictionary<TKey, TValue> dic, TValue value)
        {
            List<TKey> keyList = new List<TKey>();
            foreach (KeyValuePair<TKey, TValue> kv in dic)
            {
                if (kv.Value.Equals(value))
                {
                    TKey tmpKey = kv.Key;
                    keyList.Add(tmpKey);
                }
            }
            return keyList;
        }
 
        /// <summary>
        /// 修改指定键的值
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="needModifyKey">需要修改的键</param>
        /// <param name="replaceValue">需要替换的值</param>
        /// <returns>返回修改结果（true:表示成功）</returns>
        public static bool ModifyInfoOfKey<TKey, TValue>(Dictionary<TKey, TValue> dic, TKey needModifyKey, TValue replaceValue)
        {
            if (dic == null || dic.Count < 1) return false;
 
            if (dic.ContainsKey(needModifyKey))
            {
                dic[needModifyKey] = replaceValue;
                return true;
            }
            else
            {
                return false;
            }
        }
 
        /// <summary>
        /// 修改指定值为相同信息
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="needModifyValue">需要修改的值</param>
        /// <param name="replaceValue">需要替换的值</param>
        public static void ModifyInfoOfValue<TKey, TValue>(Dictionary<TKey, TValue> dic, TValue needModifyValue, TValue replaceValue)
        {
            if (dic == null || dic.Count < 1) return;
 
            for (int i = 0; i < dic.Count;)
            {
                TValue tmpValue = dic.ElementAt(i).Value;
                if (tmpValue.Equals(needModifyValue))
                {
                    TKey tmpKey = dic.ElementAt(i).Key;
                    dic[tmpKey] = replaceValue;
 
                    i = 0;
                }
                else
                {
                    i++;
                }
            }
 
 
        }
 
        /// <summary>
        /// 根据键移除信息
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="needDeleteKey">需要删除的键</param>
        /// <returns>返回移除结果（true:表示成功）</returns>
        public static bool RemoveInfoOfKey<TKey, TValue>(Dictionary<TKey, TValue> dic,TKey needDeleteKey)
        {
            if (dic.ContainsKey(needDeleteKey))
            {
                dic.Remove(needDeleteKey);
 
                return true;
            }
            else
            {
                return false;
            }
        }
 
        /// <summary>
        /// 根据值移除信息
        /// </summary>
        /// <typeparam name="TKey">键类型</typeparam>
        /// <typeparam name="TValue">值类型</typeparam>
        /// <param name="dic">字典</param>
        /// <param name="needDeleteValue">需要删除的值</param>
        /// <returns>返回结果（true：表示成功）</returns>
        public static bool RemoveInfoOfValue<TKey, TValue>(Dictionary<TKey, TValue> dic, TValue needDeleteValue)
        {
            if (dic == null || dic.Count < 1) return false;
 
            int initCount = dic.Count;
 
            for (int i = 0; i < dic.Count;)
            {
                TValue tmpValue = dic.ElementAt(i).Value;
                if (tmpValue.Equals(needDeleteValue))
                {
                    TKey tmpKey = dic.ElementAt(i).Key;
                    dic.Remove(tmpKey);
 
                    i = 0;
                }
                else
                {
                    i++;
                }
            }
 
            if (initCount > dic.Count)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
 
 
    }//Class_end
 
}

using Utils;

using System;
using System.Collections.Generic;
using Utils;
 
namespace Test_Dictionary
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
 
            //获取到字典信息
            Dictionary<string, string> dic = GetDictionary();
            Console.WriteLine($"1-开始获取到的字典的所有信息如下：");
            ShowInfoOfDic(dic);
 
            //根据键获取到对应的值
            string queryKey = "L1";
            Console.WriteLine($"当前查询的键是：{queryKey}");
            string tmpValue = DictionaryHelper.GetValueOfKey(dic,queryKey);
            Console.WriteLine($"2-获取到——键：L1对应的值是：{tmpValue}");
 
            //根据值获取到对应的所有键
            string queryValue = "23.4";
            Console.WriteLine($"当前查询的值是：{queryValue}");
            List<string> tmpKey = DictionaryHelper.GetKeyOfValue(dic, queryValue);
            ShowInfoOfList(tmpKey);
 
            //修改指定键的值
            string needModifyKey = "L4";
            string replaceValue1 = "66";
            Console.WriteLine($"当前需要修改的键是：{needModifyKey}_替换为的值是：{replaceValue1}");
            DictionaryHelper.ModifyInfoOfKey(dic, needModifyKey, replaceValue1);
            Console.WriteLine($"修改的键是：{needModifyKey}_替换为的值是：{replaceValue1}后所有内容如下：");
            ShowInfoOfDic(dic);
 
            //修改指定值为相同信息
            string needModifyValue = "23.6";
            string replaceValue = "33.9";
            Console.WriteLine($"当前需要修改的值是：{needModifyValue}_替换为的值是：{replaceValue}");
            DictionaryHelper.ModifyInfoOfValue(dic,needModifyValue,replaceValue);
            Console.WriteLine($"修改的值是：{needModifyValue}_替换为的值是：{replaceValue}后所有内容如下：");
            ShowInfoOfDic(dic);
 
            //根据键移除信息
            string curRemoveKey = "L3";
            Console.WriteLine($"当前移除的键是：{curRemoveKey}");
            DictionaryHelper.RemoveInfoOfKey(dic,curRemoveKey);
            Console.WriteLine($"移除的键是：{curRemoveKey}后所有内容如下：");
            ShowInfoOfDic(dic);
 
            //根据值移除信息
            string curRemoveValue = "23.4";
            Console.WriteLine($"当前移除的值是：{curRemoveValue}");
            DictionaryHelper.RemoveInfoOfValue(dic, curRemoveValue);
            Console.WriteLine($"移除的值是：{curRemoveValue}后所有内容如下：");
            ShowInfoOfDic(dic);
 
            Console.ReadLine();
        }
 
        //获取一个字典
        public static Dictionary<string, string> GetDictionary()
        {
            Dictionary<string, string> dic = new Dictionary<string, string>();
 
            DictionaryHelper.AddInfoToDic(dic, "L1","23.4");
            DictionaryHelper.AddInfoToDic(dic, "L2", "23.6");
            DictionaryHelper.AddInfoToDic(dic, "L3", "23.8");
            DictionaryHelper.AddInfoToDic(dic, "L4", "23.4");
            DictionaryHelper.AddInfoToDic(dic, "L5", "23.6");
            DictionaryHelper.AddInfoToDic(dic, "L6", "23.4");
 
            return dic;
        }
 
        //显示字典中的所有信息
        private static void ShowInfoOfDic(Dictionary<string,string> dic)
        {
            if (dic == null || dic.Count < 1) return;
 
            foreach (var item in dic)
            {
                Console.WriteLine($"键：{item.Key} 值：{item.Value}");
            }
            Console.WriteLine($"--------------显示信息完成______当前字典：{dic.GetType().Name} 共有数据：{dic.Count} 条\r\n");
        }
 
        //显示列表信息
        private static void ShowInfoOfList(List<string> list)
        {
            if (list == null || list.Count < 1) return;
            foreach (var item in list)
            {
                Console.WriteLine($"对应内容：{item}");
            }
            Console.WriteLine($"--------------显示信息完成______当前列表：{list.GetType().Name} 共有数据：{list.Count} 条\r\n");
        }
 
    }//Class_end
}