查找一个值v是否存在List>里面字典里面的value

[三页菌]

查找一个值v是否存在List<Dictionary<string, object>>里面字典里面的value，如果存在则输出该字典所在的list下标。怎么写比较好呢？
List<Dictionary<string, object>> listDic = new List<Dictionary<string, object>>();

Dictionary<string, object> dic = new Dictionary<string, object>();
dic.Add("88", "a");

Dictionary<string, object> dic2 = new Dictionary<string, object>();
dic2.Add("99", "b");

listDic.Add(dic);
listDic.Add(dic2);

查找"b"是否在listDic里的某个字典中，如果在输出该字典和字典在listDic中的索引
本来打算用for循环，但是感觉应该有更好的办法吧

[正怒月神]

static void Main(string[] args)
        {
            List<Dictionary<string, object>> listDic = new List<Dictionary<string, object>>();

            Dictionary<string, object> dic = new Dictionary<string, object>();
            dic.Add("88", "a");
            dic.Add("123", "b");
            
            Dictionary<string, object> dic2 = new Dictionary<string, object>();
            dic2.Add("99", "b");

            listDic.Add(dic);
            listDic.Add(dic2);

            var q = listDic.SelectMany(x => x.Where(y => y.Value == "b"));

            foreach (var item in q)
            {
                Console.WriteLine(item.Key+"---"+item.Value);
            }

            Console.ReadLine();
        }

[三页菌]

引用 1 楼 hanjun0612 的回复:

static void Main(string[] args)
        {
            List<Dictionary<string, object>> listDic = new List<Dictionary<string, object>>();

            Dictionary<string, object> dic = new Dictionary<string, object>();
            dic.Add("88", "a");
            dic.Add("123", "b");
            
            Dictionary<string, object> dic2 = new Dictionary<string, object>();
            dic2.Add("99", "b");

            listDic.Add(dic);
            listDic.Add(dic2);

            var q = listDic.SelectMany(x => x.Where(y => y.Value == "b"));

            foreach (var item in q)
            {
                Console.WriteLine(item.Key+"---"+item.Value);
            }

            Console.ReadLine();
        }

问下这个q能转换成字典吗？

[三页菌]

上面的确实可以，要是能输出是list的第几个字典 list索引 就好了

[正怒月神]

引用 2 楼 m0_37796494 的回复:

[quote=引用 1 楼 hanjun0612 的回复:]

static void Main(string[] args)
        {
            List<Dictionary<string, object>> listDic = new List<Dictionary<string, object>>();

            Dictionary<string, object> dic = new Dictionary<string, object>();
            dic.Add("88", "a");
            dic.Add("123", "b");
            
            Dictionary<string, object> dic2 = new Dictionary<string, object>();
            dic2.Add("99", "b");

            listDic.Add(dic);
            listDic.Add(dic2);

            var q = listDic.SelectMany(x => x.Where(y => y.Value == "b"));

            foreach (var item in q)
            {
                Console.WriteLine(item.Key+"---"+item.Value);
            }

            Console.ReadLine();
        }

问下这个q能转换成字典吗？[/quote] 这个q是 List<Dictionary<string, object>>类型的。因为我在测试数据中，插入了2个 value为b的字典项。

[正怒月神]

引用 3 楼 m0_37796494 的回复:

上面的确实可以，要是能输出是list的第几个字典 list索引 就好了

要下标的话，那就只能产生新对象了。

List<Dictionary<string, object>> listDic = new List<Dictionary<string, object>>();

            Dictionary<string, object> dic = new Dictionary<string, object>();
            dic.Add("88", "a");
            dic.Add("123", "b");

            Dictionary<string, object> dic2 = new Dictionary<string, object>();
            dic2.Add("99", "b");

            listDic.Add(dic);
            listDic.Add(dic2);

            var q = listDic.Select((x, i) => new
            {
                index = i,
                dict = x.Where(y => y.Value.ToString() == "b")
            });

            foreach (var item in q)
            {
                Console.WriteLine("index:{0}",item.index);
                foreach (var v in item.dict)
                {
                    Console.WriteLine(v.Key+"---"+v.Value);
                }
            }

            Console.ReadLine();