Question

我正在尝试在文件中查找状态的子字符串。我打开文件并一次加载每一行字符串。然后我想检查每个字符串是否包含我的子字符串中的一个状态。它没有按预期工作，因为它不断返回＆＃34;找不到子串＆＃34;即使我知道状态在字符串中。我做错了什么？

编辑：我现在意识到错误，这条线是完全错误的：

if (lines.Any(stringToCheck.Contains))

应该是这样的：

if (stringToCheck.Any(s.Contains))

感谢帮助人员。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace ConsoleApplication2
{
    class Program
    {
       static void Main (string[] args)
    {

        string[] stringToCheck = {"Alabama","Alaska","Arizona","Arkansas","California","Colorado"}; 

        string[] lines = File.ReadAllLines(@"C:\C# Project\sampledata.dat");
        foreach (string s in lines)
        {
            if (lines.Any(stringToCheck.Contains))
            {
                Console.WriteLine("Found substring");
                Console.WriteLine(s);
                Console.ReadLine();
            }
            else
            Console.WriteLine("Could not find substring");
            Console.WriteLine(s);
            Console.ReadLine() ;
        }


    }
}

}

Answer 1

您可以在状态列表上使用Any来检查该行包含的每个州是否有任何字符串。样本：

    if (stringToCheck.Any(x = > s.Contains(x))
    {
      // ...
    }

Answer 2

你可以这样做：

as ct(...)

Answer 3

你可以这样做：

string[] stringToCheck = { "Alabama", "Alaska", "Arizona", "Arkansas", "California", "Colorado" };

//Some test lines
string[] lines = { "sadnaskjd Alabama", "sadasd Arizona", "asdasdaer" };

//A bool telling me if I found anything, 
//you could skip the bool and just use else in the foreach :)
bool contains = false;


foreach ( var check in stringToCheck )
{
    if ( lines.Any( l => l.Contains( check ) ) )
    {
        Console.WriteLine( "Found substring" );
        Console.WriteLine( s );
        contains = true;
    }  
}

if ( contains == false )
{
    Console.WriteLine("Could not find substring");
    Console.ReadLine();
}

Answer 4

试试这个想法：

1.2345789

然后将if (line.Any(x=>CheckKeyWordsInLine(line, stringToCheck)){ //The line contains one of the keywords }else{ //The line does not contain any of the keywords }函数定义为：

CheckKeyWordsInLine

如何使用。使用C＃在LINQ中包含。

4 个答案: