116 lines
4.0 KiB
C#
116 lines
4.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data.SQLite;
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using System.IO;
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using System.Linq;
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using System.Windows.Forms;
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using DualScreenDemo;
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namespace DBObj
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{
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/**
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從資料庫取資料回來
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*/
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public class ArtistManager
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{
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private static ArtistManager _instance;
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public List<Artist> AllArtists { get; private set; }
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public static ArtistManager Instance
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{
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get
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{
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if (_instance == null)
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{
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_instance = new ArtistManager();
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}
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return _instance;
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}
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}
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public ArtistManager()
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{
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AllArtists = new List<Artist>();
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LoadArtists();
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}
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private void LoadArtists()
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{
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string databaseFileName = "KSongDatabase.db";
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string databasePath = Path.Combine(Application.StartupPath, databaseFileName);
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Console.WriteLine(databasePath);
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string connectionString = String.Format("Data Source={0};Version=3;", databasePath);
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using (var connection = new SQLiteConnection(connectionString))
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{
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try
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{
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connection.Open();
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string sql = "SELECT 歌手姓名, 歌手注音, 歌手分類, 歌手筆畫 FROM ArtistLibrary";
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using (var command = new SQLiteCommand(sql, connection))
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{
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using (SQLiteDataReader reader = command.ExecuteReader())
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{
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while (reader.Read())
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{
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string artist = reader["歌手姓名"].ToString();
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string phonetic = reader["歌手注音"].ToString();
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string category = reader["歌手分類"].ToString();
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string strokesStr = reader["歌手筆畫"].ToString();
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if (string.IsNullOrEmpty(strokesStr))
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{
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// Console.WriteLine("歌手筆畫的值為空或無效");
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}
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if (double.TryParse(strokesStr, out double strokesDouble))
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{
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int strokes = (int)Math.Round(strokesDouble);
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AllArtists.Add(new Artist(artist, phonetic, category, strokes));
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}
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else
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{
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// Console.WriteLine($"Failed to parse '歌手筆畫' value: {strokesStr}");
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}
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}
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}
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}
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connection.Close();
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}
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catch (Exception ex)
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{
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Console.WriteLine("Failed to load artists from SQLite database: " + ex.Message);
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}
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}
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}
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private void PrintAllArtists()
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{
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Console.WriteLine("All Artists:");
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foreach (var artist in AllArtists)
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{
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Console.WriteLine(artist.ToString());
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}
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}
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public List<Artist> GetArtistsByCategoryAndStrokeCountRange(string category, int minStrokes, int maxStrokes)
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{
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if (category == "全部")
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{
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return AllArtists.Where(artist => artist.Strokes >= minStrokes && artist.Strokes <= maxStrokes).ToList();
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}
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else
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{
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return AllArtists.Where(artist => artist.Category == category && artist.Strokes >= minStrokes && artist.Strokes <= maxStrokes).ToList();
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}
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}
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}
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} |