c# 使用EnyimMemcached 连接memcache

首先nuget安装EnyimMemcached，本地启动memcache，往app.config（mvc项目则是web.config）加入以下内容：

configSection内加入：

<sectionGroup name="enyim.com">
<section name="memcached" type="Enyim.Caching.Configuration.MemcachedClientSection, Enyim.Caching" />
</sectionGroup>

configSection外加入：

<enyim.com>
<memcached protocol="Text">
<servers>
<!-- make sure you use the same ordering of nodes in every configuration you have -->
<add address="127.0.0.1" port="11211" />
<!-- <add address="ip address" port="port number" />-->
</servers>
<socketPool minPoolSize="5" maxPoolSize="10" />

</memcached>
</enyim.com>

这里要注意一点：教程上写<memcached protocol="Text">中protocol可配置为Binary，但是如果这么配的话必定会连不上memcache。

完整配置示例：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <sectionGroup name="enyim.com">
      <section name="memcached" type="Enyim.Caching.Configuration.MemcachedClientSection, Enyim.Caching" />
    </sectionGroup>
  </configSections>

  <enyim.com>
    <memcached protocol="Text">
      <servers>
        <!-- make sure you use the same ordering of nodes in every configuration you have -->
        <add address="127.0.0.1" port="11211" />
      </servers>
      <socketPool minPoolSize="5" maxPoolSize="10"  />

    </memcached>
  </enyim.com>
<!--
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
    </startup>-->
</configuration>

EnyimMemcached的详细配置参数：https://github.com/enyim/EnyimMemcached/wiki/MemcachedClient-Configuration

具体用法：https://github.com/enyim/EnyimMemcached/wiki/MemcachedClient-Usage

封装MemcacheHelper类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Enyim.Caching;
using Enyim.Caching.Configuration;
using Enyim.Caching.Memcached;

namespace Common
{
    public class MemcachedHelper
    {
        private static MemcachedClient MemClient;
        static readonly object padlock = new object();

        //线程安全的单例模式
        public static MemcachedClient getInstance()
        {
            if (MemClient == null)
            {
                lock (padlock)
                {
                    if (MemClient == null)
                    {
                        MemClientInit();
                    }
                }
            }
            return MemClient;
        }

        static void MemClientInit()
        {
            try
            {
                MemClient = new MemcachedClient();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 插入指定值
        /// </summary>
        /// <param name="key">缓存名称 </param>
        /// <param name="value">缓存值</param>
        /// <param name="dateTime">过期时间</param>
        /// <returns>返回是否成功</returns>
//        public static bool Set(string key, string value, int minutes = 10080)
        public static bool Set(string key, string value, DateTime dateTime)
        {
            MemcachedClient mc = getInstance();
            var data = mc.Get(key);

            if (data == null)
                return mc.Store(StoreMode.Add, key, value, dateTime);
            else
                return mc.Store(StoreMode.Replace, key, value, dateTime);
        }

        /// <summary>
        /// 插入指定值
        /// </summary>
        /// <param name="key">缓存名称 </param>
        /// <param name="value">缓存值</param>
        /// <returns>返回是否成功</returns>
        //        public static bool Set(string key, string value, int minutes = 10080)
        public static bool Set(string key, string value)
        {
            MemcachedClient mc = getInstance();
            var data = mc.Get(key);

            DateTime dateTime = DateTime.Now.AddMinutes();
            if (data == null)
                return mc.Store(StoreMode.Add, key, value, dateTime);
            else
                return mc.Store(StoreMode.Replace, key, value, dateTime);
        }

        /// <summary>
        /// 获取缓存值
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static object Get(string key)
        {
            MemcachedClient mc = getInstance();
            return mc.Get(key);
        }

        /// <summary>
        /// 删除指定缓存
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static bool Remove(string key)
        {
            MemcachedClient mc = getInstance();

            return mc.Remove(key);
        }

        /// <summary>
        /// 清空缓存服务器上的缓存
        /// </summary>
        public static void FlushCache()
        {
            MemcachedClient mc = getInstance();

            mc.FlushAll();
        }
    }

}