实现一个基本的排行榜系统通常涉及到对分数进行排序,而 Redis 的 Sorted Set 数据结构非常适合这种用途。以下是一个使用 StackExchange.Redis 库在 C# 中实现排行榜的简单案例:
- 安装 StackExchange.Redis 库:
Install-Package StackExchange.Redis
- 创建一个排行榜管理器类:
using StackExchange.Redis;
using System;
public class RedisLeaderboardManager
{
private readonly Lazy<ConnectionMultiplexer> _lazyConnection;
public RedisLeaderboardManager(string connectionString)
{
_lazyConnection = new Lazy<ConnectionMultiplexer>(() =>
{
return ConnectionMultiplexer.Connect(connectionString);
});
}
private IDatabase GetDatabase()
{
return _lazyConnection.Value.GetDatabase();
}
public void AddScore(string leaderboardKey, string member, double score)
{
var database = GetDatabase();
database.SortedSetAdd(leaderboardKey, member, score);
}
public double GetScore(string leaderboardKey, string member)
{
var database = GetDatabase();
return database.SortedSetScore(leaderboardKey, member) ?? 0;
}
public long GetRank(string leaderboardKey, string member, bool highToLow = true)
{
var database = GetDatabase();
long? rank;
if (highToLow)
{
rank = database.SortedSetRank(leaderboardKey, member, Order.Descending);
}
else
{
rank = database.SortedSetRank(leaderboardKey, member);
}
return rank ?? -1; // -1 indicates that the member is not in the leaderboard
}
public SortedSetEntry[] GetTopPlayers(string leaderboardKey, long startRank, long stopRank, bool highToLow = true)
{
var database = GetDatabase();
Order order = highToLow ? Order.Descending : Order.Ascending;
return database.SortedSetRangeByRankWithScores(leaderboardKey, startRank, stopRank, order);
}
}
- 在你的应用程序中使用排行榜:
class Program
{
static void Main()
{
// 替换为你的 Redis 服务器连接字符串
string redisConnectionString = "your_redis_connection_string";
var leaderboardManager = new RedisLeaderboardManager(redisConnectionString);
// 示例排行榜键
string leaderboardKey = "game_leaderboard";
// 模拟玩家分数
leaderboardManager.AddScore(leaderboardKey, "player1", 1000);
leaderboardManager.AddScore(leaderboardKey, "player2", 800);
leaderboardManager.AddScore(leaderboardKey, "player3", 1200);
// 获取玩家分数和排名
double player1Score = leaderboardManager.GetScore(leaderboardKey, "player1");
Console.WriteLine($"Player1 Score: {player1Score}");
long player1Rank = leaderboardManager.GetRank(leaderboardKey, "player1");
Console.WriteLine($"Player1 Rank: {player1Rank}");
// 获取排行榜前两名玩家
SortedSetEntry[] topPlayers = leaderboardManager.GetTopPlayers(leaderboardKey, 0, 1);
foreach (var player in topPlayers)
{
Console.WriteLine($"{player.Element} - Score: {player.Score}");
}
Console.ReadLine();
}
}
确保替换代码中的 your_redis_connection_string
为你的 Redis 服务器连接字符串。在这个案例中,我们使用 SortedSet
存储玩家分数,并通过不同的方法来获取分数、排名和排行榜的前几名玩家。你可以根据需要调整这些方法以满足具体业务需求。