samples/snippets/csharp/how-to/strings/ParseStringsUsingSplit.cs - main - aprogrammer/dotnet-docs

samples/snippets/csharp/how-to/strings/ParseStringsUsingSplit.cs
145 строк4 KB
Cam Soper
String.Split stuff (#39850)
07 мар 2024, 18:10
07 мар 2024, 18:10c3b05ee
using System;
using System.Linq;

namespace HowToStrings
{
    public static class ParseStringsUsingSplit
    {
        public static void Examples()
        {
            Console.WriteLine("Split words");
            Console.WriteLine();
            SplitWords();

            Console.WriteLine("Enumerate words");
            Console.WriteLine();
            EnumerateWords();

            Console.WriteLine("Split words with repeated separators");
            Console.WriteLine();
            SplitWordsWithRepeatedSeparators();

            Console.WriteLine("Split on multiple chars");
            Console.WriteLine();
            SplitOnMultipleChars();

            Console.WriteLine("Split on multiple chars with gaps");
            Console.WriteLine();
            SplitOnMultipleCharsWithGaps();

            Console.WriteLine("Split using strings");
            Console.WriteLine();
            SplitUsingStrings();

            Console.WriteLine("Split into no more than four substrings");
            Console.WriteLine();
            SplitFourTimes();
        }

        private static void SplitWords()
        {
            // <Snippet1>
            string phrase = "The quick brown fox jumps over the lazy dog.";
            string[] words = phrase.Split(' ');

            foreach (var word in words)
            {
                System.Console.WriteLine($"<{word}>");
            }
            // </Snippet1>
        }

        private static void EnumerateWords()
        {
            // <Snippet1.5>
            string phrase = "The quick brown fox jumps over the lazy dog.";
            string[] words = phrase.Split(' ');

            for (int i = 0; i < words.Length; i++)
            {
                System.Console.WriteLine($"Index {i}: <{words[i]}>");
            }
            // </Snippet1.5>
        }

        private static void SplitWordsWithRepeatedSeparators()
        {
            // <Snippet2>
            string phrase = "The quick brown    fox     jumps over the lazy dog.";
            string[] words = phrase.Split(' ');

            foreach (var word in words)
            {
                System.Console.WriteLine($"<{word}>");
            }
            // </Snippet2>
        }

        private static void SplitOnMultipleChars()
        {
            // <Snippet3>
            char[] delimiterChars = { ' ', ',', '.', ':', '\t' };

            string text = "one\ttwo three:four,five six seven";
            System.Console.WriteLine($"Original text: '{text}'");

            string[] words = text.Split(delimiterChars);
            System.Console.WriteLine($"{words.Length} words in text:");

            foreach (var word in words)
            {
                System.Console.WriteLine($"<{word}>");
            }
            // </Snippet3>
        }

        private static void SplitOnMultipleCharsWithGaps()
        {
            // <Snippet4>
            char[] delimiterChars = { ' ', ',', '.', ':', '\t' };

            string text = "one\ttwo :,five six seven";
            System.Console.WriteLine($"Original text: '{text}'");

            string[] words = text.Split(delimiterChars);
            System.Console.WriteLine($"{words.Length} words in text:");

            foreach (var word in words)
            {
                System.Console.WriteLine($"<{word}>");
            }
            // </Snippet4>
        }

        private static void SplitUsingStrings()
        {
            // <Snippet5>
            string[] separatingStrings = { "<<", "..." };

            string text = "one<<two......three<four";
            System.Console.WriteLine($"Original text: '{text}'");

            string[] words = text.Split(separatingStrings, System.StringSplitOptions.RemoveEmptyEntries);
            System.Console.WriteLine($"{words.Length} substrings in text:");

            foreach (var word in words)
            {
                System.Console.WriteLine(word);
            }
            // </Snippet5>
        }

        private static void SplitFourTimes()
        {
            // <Snippet6>
            string phrase = "The quick brown fox jumps over the lazy dog.";
            string[] words = phrase.Split(' ', 4, System.StringSplitOptions.None);

            foreach (var word in words)
            {
                System.Console.WriteLine($"<{word}>");
            }
            // </Snippet6>
        }
    }
}