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[C#] 文字列を空白で分割する(複数指定, 連続空白, 半角/全角空白対応)

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WPFで検索バーを実装する際に半角/全角空白で分割する指定方法が必要だったのでメモ

基本的に string.Split() を使用すれば良いです。
連続空白の場合の対応として、データがない場合を無視する StringSplitOptions.RemoveEmptyEntries オプションを使用します。

さすがにユニコード空白は考えないことにしてますが必要なら足してください。

実装例

サンプル
using System;

namespace hwapp
{
    class Program
    {
        static void Main(string[] args)
        {
            // 半角空白, 連続半角空白, 全角空白, 連続全角空白
            var text = "hoge foo  bar Hoge  Foo";

            SplitFunc1(text);
            SplitFunc2(text);
        }

        private static void SplitFunc1(string text)
        {
            var words = text.Split(new string[] { " ", " " }, StringSplitOptions.RemoveEmptyEntries);

            foreach (var word in words)
            {
                Console.WriteLine($"[1] {word}");
            }
        }

        private static void SplitFunc2(string text)
        {
            var words = text.Split(new char[] { ' ', ' ' }, StringSplitOptions.RemoveEmptyEntries);

            foreach (var word in words)
            {
                Console.WriteLine($"[2] {word}");
            }
        }
    }
}
実行結果
[1] hoge
[1] foo
[1] bar
[1] Hoge
[1] Foo
[2] hoge
[2] foo
[2] bar
[2] Hoge
[2] Foo

参考

StringSplitOptions 列挙型 (System)

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