using System.Collections.Generic;

 namespace NetAnalysis.Common

 {

   public static class DictionaryExtensionMethodClass

     {

         /// <summary>

         /// 尝试将键和值添加到字典中：如果不存在，才添加；存在，不添加也不抛导常

         /// </summary>

         public static Dictionary<TKey, TValue> TryAdd<TKey, TValue>(this Dictionary<TKey, TValue> dict, TKey key, TValue value)

         {

             if (dict.ContainsKey(key) == false)

                 dict.Add(key, value);

             return dict;

         }

         /// <summary>

         /// 将键和值添加或替换到字典中：如果不存在，则添加；存在，则替换

         /// </summary>

         public static Dictionary<TKey, TValue> AddOrPeplace<TKey, TValue>(this Dictionary<TKey, TValue> dict, TKey key, TValue value)

         {

             dict[key] = value;

             return dict;

         }

         /// <summary>

         /// 获取与指定的键相关联的值，如果没有则返回输入的默认值

         /// </summary>

         public static TValue GetValue<TKey, TValue>(this Dictionary<TKey, TValue> dict, TKey key, TValue defaultValue)

         {

             return dict.ContainsKey(key) ? dict[key] : defaultValue;

         }

         /// <summary>

         /// 向字典中批量添加键值对

         /// </summary>

         /// <param name="replaceExisted">如果已存在，是否替换</param>

         public static Dictionary<TKey, TValue> AddRange<TKey, TValue>(this Dictionary<TKey, TValue> dict, IEnumerable<KeyValuePair<TKey, TValue>> values, bool replaceExisted)

         {

             foreach (var item in values)

             {

                 if (dict.ContainsKey(item.Key) == false || replaceExisted)

                     dict[item.Key] = item.Value;

             }

             return dict;

         }

   }

 }