Question

我有一个字符串和一个字符串列表。我试图返回一个列表，str中包含strList，结果应为4和21。

这是我的代码，不知道我错过了什么。

string str= "21,1,4";
List<string> strList= new List<string> { "4","21" };

var a = str.Where(i => i.ToString().Split(new char[] { ',' },StringSplitOptions.RemoveEmptyEntries).ToList().Any(s=>strList.Contains(s)));

Answer 1

    string str = "21,1,4";
    List<string> strList = new List<string> { "4", "21" };
    var splitStr = str.Split(',');
    var result = splitStr.Where(x => strList.Contains(x));

Answer 2

string str= "21,1,4";
List<string> strList= new List<string> { "4","21" };
string[] result = str.Split(',');

foreach(string s in result)
   if(strList.Contains(s))
      Console.WriteLine(s);

简单。

Answer 3

将这一切保持在一条线上，这似乎是你的目标：

string str = "21,1,4";
List<string> strList = new List<string> { "4", "21" };

var a = str.Split(',').Where(s => strList.Contains(s));

a将是strList中包含的str（分割后）中所有值的IEnumerable。

Answer 4

您可以使用Intersect

string str = "21,1,4";
List<string> strList = new List<string> { "4", "21" };
var result = str.Split(',').Intersect(strList);
Console.WriteLine(string.Join(", ", result));

输出：

21,4

代码的问题在于，通过执行str.Where，您将迭代字符串的字符。您应该只是拆分str然后迭代它以查找strList中的匹配项。

Answer 5

你可以做到

string str = "21,1,4";
List<string> strList = new List<string> { "4", "21" };

List<string> splitList = str.Split(",").ToList();

List<string> overlap = strList.Where(str => splitList.Contains(str)).ToList();

Answer 6

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        {
            chromeOptions = new ChromeOptions();
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            driver = new ChromeDriver(System.AppDomain.CurrentDomain.BaseDirectory + @"Resources\", chromeOptions);
            driver.Manage().Window.Maximize();

            string url = "https://www.somepage.com";
            driver.Navigate().GoToUrl(url);
        }
    }

其中var str = "21,1,4"; var otherStrList = new List<string> { "4", "21" }; var separatedstrList = str.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).ToList(); var commonStrings = separatedstrList.Intersect(otherStrList);是您正在寻找的答案。

Answer 7

优雅的Join语法怎么样：

var results = (from main in str.Split(',')
                join key in strList
                on main equals key
                select main).ToList();

如果您要删除重复项（如果.Distinct()有重复项），您可以在.ToList()之前添加str。

带分割的字符串列表

7 个答案: