List<string[]> 如何去重

List<string[]> 如何去重，代码如下:

static void Main(string[] args)

        {

            List<string[]> list = new List<string[]>();

            list.Add(new string[] { "", "", "" });

            list.Add(new string[] { "" });

            list.Add(new string[] { "", "", "" });

            list.Add(new string[] { "" });

            list.Add(new string[] { "" });

            List<string> strList = new List<string>();

            foreach (var item in list)

            {

                string s = string.Join(",", item);

                strList.Add(s);

            }

            //要删除的元素的下标集合

            List<int> removeIndexList = new List<int>();

            if (list.Count >= )  //确保下标i不越界

            {

                string currentStr = string.Empty;

                for (int i = ; i < strList.Count; i++)

                {

                    currentStr = strList[i];

                    for (int j = i + ; j < strList.Count; j++)

                    {

                        if (currentStr == strList[j])

                        {

                            //添加到要删除的索引集合removeIndexList中

                            removeIndexList.Add(j);

                        }

                    }

                }

                removeIndexList = removeIndexList.Distinct().ToList();////去除重复的索引

                //添加到要删除的对象集合

                List<string[]> removeList = new List<string[]>();

                foreach (var index in removeIndexList)

                {

                    removeList.Add(list[index]);

                }

                //遍历要删除对象的集合，删除原集合中的对象

                foreach (var item in removeList)

                {

                    list.Remove(item);

                }

                foreach (var item in list)

                {

                    string s = string.Join(",", item);

                    Console.WriteLine(s);

                }

                Console.ReadKey();

            }

        }

运行截图如下：

那么问题又来了，挖掘机技术……呸！ 如果是List<List<string[]>>的集合又该如何去重呢？

原理是一样的把List<string[]>变成字符串，装到List<string>中，根据List<sting>重复的元素的下标索引，删除原集合中重复的元素，

代码如下:

 static void Main(string[] args)

        {

            List<string[]> list = new List<string[]>();

            list.Add(new string[]{"","",""});

            list.Add(new string[] { "","" ,""});

            list.Add(new string[] { "" });

            list.Add(new string[] { "" });

            list.Add(new string[] { "" });

            List<string[]> list2 = new List<string[]>();

            list2.Add(new string[] { "", "", "", "", "" });

            list2.Add(new string[] { "", "", "" });

            list2.Add(new string[] { "" });

            list2.Add(new string[] { "" });

            list2.Add(new string[] { "" });

            List<string[]> list3 = new List<string[]>();

            list3.Add(new string[] { "", "", "" });

            list3.Add(new string[] { "", "", "" });

            list3.Add(new string[] { "" });

            list3.Add(new string[] { "" });

            list3.Add(new string[] { "" });

            List<string[]> list4= new List<string[]>();

            list4.Add(new string[] { "", "", "", "", "" });

            list4.Add(new string[] { "", "", "" });

            list4.Add(new string[] { "" });

            list4.Add(new string[] { "" });

            list4.Add(new string[] { "" });

            List<List<string[]>> superList = new List<List<string[]>>();

            //集合list和集合list3是相同，list2和list4相同，并且list4添加了2次

            superList.Add(list);

            superList.Add(list2);

            superList.Add(list3);

            superList.Add(list4);

            superList.Add(list4);

            List<string> strList = new List<string>();

            foreach (var d in superList)

            {

                StringBuilder sb = new StringBuilder();

                foreach (var dd in d)

                {

                    string s = string.Join(",", dd);

                    sb.Append(s);

                }

                string str = sb.ToString();

                strList.Add(str); //把superList中每个子元素拼接成一条字符串放到strList中

            }

            //要删除的元素的下标集合

            List<int> removeIndexList = new List<int>();

            if (strList.Count >= ) //有2个以上的元素才有可能出现重复

            {

                string currentStr = string.Empty;

                for (int i =; i < strList.Count; i++)

                {

                    currentStr = strList[i];

                    for (int j =i+; j < strList.Count; j++)

                    {

                        if (currentStr == strList[j])

                        {

                            //添加到要删除的索引集合removeIndexList中

                            removeIndexList.Add(j);

                        }

                    }

                }

            }

            removeIndexList = removeIndexList.Distinct().ToList();//去除重复的索引

            //要删除的对象集合

            List<List<string[]>> superRemoveList = new List<List<string[]>>();

            foreach (var index in removeIndexList)

            {

                superRemoveList.Add(superList[index]);

            }

            foreach (var item in superRemoveList)

            {

                superList.Remove(item);

            }

            Console.WriteLine(superList.Count());

            Console.ReadKey();

        }

运行截图如下: