Question

我正在使用StackExchange.Redis使用多个数据库在redis缓存中存储和检索项目。

但是，我无法弄清楚如何在所有数据库中检索键/值。以下代码从默认数据库0中检索密钥，我找不到如何更改它以从每个数据库中检索密钥

    public IEnumerable<KeyValuePair<string, object>> GetAll()
    {
        var result = new List<KeyValuePair<string, object>>();
        var endpoints = _dataCache.Multiplexer.GetEndPoints();
        var server = _dataCache.Multiplexer.GetServer(endpoints.First());

        var keys = server.Keys();
        foreach (var key in keys)
        {
            Console.WriteLine(key.ToString());
        }
        return result;
    }

有什么建议吗？

Answer 1

似乎我找到了答案 - 需要将数据库名称传递给实际的.Keys，如下所示

var keys = server.Keys(_dataCache.Database);

Answer 2

您需要编写：var keys = server.Keys（ int dbName ）; 我在示例中添加了如何通过键获取值

public static ConnectionMultiplexer Connection
{
   get
   {
      return ConnectionMultiplexer.Connect("serverName: port");
   }
}

        public Dictionary<string, string> GetDataFromDataBase(srting sPattern = "*")
        {
         int dbName = 2; //or 0, 1, 2
         Dictionary<string, string> dicKeyValue = new Dictionary<string, string>();
         var keys = Connection.GetServer("serverName: port").Keys(dbName, pattern: sPattern);
         string[] keysArr = keys.Select(key =>(string)key).ToArray();

         foreach(var key in keysArr)
         {
           dicKeyValue.Add(key, GetFromDB(dbName , key));
         }

         return dicKeyValue;
        }

    public string GetFromDB(int dbName, string key)
    {
      var db = Connection.GetDatabase(dbName);
      return db.StringGet(key);
    }

Answer 3

using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                string folderPath = @"C:\RedisCache\" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + @"\";
                Directory.CreateDirectory(folderPath);
                IDictionary<string, string> dicts = GetDataFromDataBase();

            using (TextWriter tw = new StreamWriter(folderPath + "BatchFile.bat"))
            {
                foreach (var dic in dicts)
                {
                    tw.WriteLine("REDIS COMMAND");
                }
            }

            }
            catch(Exception ex)
            {
                throw ex;
            }
        }

        public static ConnectionMultiplexer Connection
        {
            get
            {
                return ConnectionMultiplexer.Connect("serverName: port");
            }
        }

        public static Dictionary<string, string> GetDataFromDataBase(string sPattern = "*")
        {
            int dbName = 2; //or 0, 1, 2
            Dictionary<string, string> dicKeyValue = new Dictionary<string, string>();
            var keys = Connection.GetServer("serverName: port").Keys(dbName, pattern: sPattern);
            string[] keysArr = keys.Select(key => (string)key).ToArray();

            foreach (var key in keysArr)
            {
                dicKeyValue.Add(key, GetFromDB(dbName, key));
            }

            return dicKeyValue;
        }

        public static string GetFromDB(int dbName, string key)
        {
            var db = Connection.GetDatabase(dbName);
            return db.StringGet(key);
        }
    }
}

从所有redis数据库中获取所有密钥和值？

3 个答案: