RosterSnap/Form1.cs

using System.Text;

namespace RosterSnap
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            OnTextChanged();
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            OnTextChanged();
        }

        private void OnTextChanged()
        {
            // 1. 左侧名单
            var roster = SplitLines(textBox1.Text);

            // 2. 右侧接龙：去掉行首序号、点号、空格等，只保留名字
            var dragonRaw = SplitLines(textBox2.Text);
            var dragon = new List<string>();

            foreach (var line in dragonRaw)
            {
                // 去掉行首的 #接龙、例 姓名 等无用行
                if (line.StartsWith("#") || line.StartsWith("例")) continue;

                // 用正则把 “数字. 姓名 备注” 中的姓名提取出来
                var match = System.Text.RegularExpressions.Regex.Match(line, @"^\s*\d+\.\s*([^\s]+)");
                if (match.Success)
                    dragon.Add(match.Groups[1].Value);
            }

            // 3. 比对
            var missing = roster
                .Where(n => !dragon.Contains(n, StringComparer.OrdinalIgnoreCase))
                .ToList();

            var sb = new StringBuilder();
            sb.AppendLine($"名单共 {roster.Count} 人，接龙中已出现 {roster.Count - missing.Count} 人。");
            if (missing.Count == 0)
            {
                sb.AppendLine("✅ 所有人已接龙。");
            }
            else
            {
                sb.AppendLine($"❌ 以下 {missing.Count} 人缺席：");
                missing.ForEach(n => sb.AppendLine(n));
            }

            textBox3.Text = sb.ToString();
        }

        private static List<string> SplitLines(string text) =>
            text.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries)
                .Select(s => s.Trim())
                .Where(s => !string.IsNullOrWhiteSpace(s))
                .ToList();

        private void linkLabel1_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
            {
                FileName = linkLabel1.Text,
                UseShellExecute = true
            });
        }
    }
}