C#中如何使用redis--ServiceStack.Redis
Redis官网提供了很多开源的C#客户端。例如，Nhiredis ，ServiceStack.Redis ，StackExchange.Redis等。其中ServiceStack.Redis应该算是比较流行的。它提供了一整套从Redis数据结构都强类型对象转换的机制并将对象json序列化。所以这里只介绍ServiceStack.Redis，它也是目前我们产品中所使用的客户端。
ServiceStack.Redis地址：https://github.com/ServiceStack/ServiceStack.Redis
1. 建立一个控制台应用程序，并引用以下ServiceStack.Redis相关的四个类库。或者通过Nuget进行安装Redis常用组件ServiceStack.Redis。 下载示例代码。
2. 创建一个Redis操作的公用类RedisCacheHelper，
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using
System;
using
System.Collections.Generic;
using
System.Configuration;
using
System.Linq;
using
System.Text;
using
System.Web;
using
ServiceStack.Common.Extensions;
using
ServiceStack.Redis;
using
ServiceStack.Logging;
namespace
Weiz.Redis.RedisTest
{
public
class
RedisCacheHelper
{
private
static
readonly
PooledRedisClientManager pool =
null
;
private
static
readonly
string
[] redisHosts =
null
;
public
static
int
RedisMaxReadPool =
int
.Parse(ConfigurationManager.AppSettings[
"redis_max_read_pool"
]);
public
static
int
RedisMaxWritePool =
int
.Parse(ConfigurationManager.AppSettings[
"redis_max_write_pool"
]);
static
RedisCacheHelper()
{
var
redisHostStr = ConfigurationManager.AppSettings[
"redis_server_session"
];
if
(!
string
.IsNullOrEmpty(redisHostStr))
{
redisHosts = redisHostStr.Split(
','
);
if
(redisHosts.Length > 0)
{
pool =
new
PooledRedisClientManager(redisHosts, redisHosts,
new
RedisClientManagerConfig()
{
MaxWritePoolSize = RedisMaxWritePool,
MaxReadPoolSize = RedisMaxReadPool,
AutoStart =
true
});
}
}
}
public
static
void
Add
string
key, T value, DateTime expiry)
{
if
(value ==
null
)
{
return
;
}
if
(expiry <= DateTime.Now)
{
Remove(key);
return
;
}
try
{
if
(pool !=
null
)
{
using
(
var
r = pool.GetClient())
{
if
(r !=
null
)
{
r.SendTimeout = 1000;
r.Set(key, value, expiry - DateTime.Now);
}
}
}
}
catch
(Exception ex)
{
string
msg =
string
.Format(
"{0}:{1}发生异常!{2}"
,
"cache"
,
"存储"
, key);
}
}
public
static
void
Add
string
key, T value, TimeSpan slidingExpiration)
{
if
(value ==
null
)
{
return
;
}
if
(slidingExpiration.TotalSeconds <= 0)
{
Remove(key);
return
;
}
try
{
if
(pool !=
null
)
{
using
(
var
r = pool.GetClient())
{
if
(r !=
null
)
{
r.SendTimeout = 1000;
r.Set(key, value, slidingExpiration);
}
}
}
}
catch
(Exception ex)
{
string
msg =
string
.Format(
"{0}:{1}发生异常!{2}"
,
"cache"
,
"存储"
, key);
}
}
public
static
T Get
string
key)
{
if
(
string
.IsNullOrEmpty(key))
{
return
default
(T);
}
T obj =
default
(T);
try
{
if
(pool !=
null
)
{
using
(
var
r = pool.GetClient())
{
if
(r !=
null
)
{
r.SendTimeout = 1000;
obj = r.Get
}
}
}
}
catch
(Exception ex)
{
string
msg =
string
.Format(
"{0}:{1}发生异常!{2}"
,
"cache"
,
"获取"
, key);
}
return
obj;
}
public
static
void
Remove(
string
key)
{
try
{
if
(pool !=
null
)
{
using
(
var
r = pool.GetClient())
{
if
(r !=
null
)
{
r.SendTimeout = 1000;
r.Remove(key);
}
}
}
}
catch
(Exception ex)
{
string
msg =
string
.Format(
"{0}:{1}发生异常!{2}"
,
"cache"
,
"删除"
, key);
}
}
public
static
bool
Exists(
string
key)
{
try
{
if
(pool !=
null
)
{
using
(
var
r = pool.GetClient())
{
if
(r !=
null
)
{
r.SendTimeout = 1000;
return
r.ContainsKey(key);
}
}
}
}
catch
(Exception ex)
{
string
msg =
string
.Format(
"{0}:{1}发生异常!{2}"
,
"cache"
,
"是否存在"
, key);
}
return
false
;
}
}
}
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说明：RedisCacheHelper 使用的是客户端链接池模式，这样的存取效率应该是最高的。同时也更方便的支持读写分离，均衡负载。
3. 配置文件
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4. 测试程序调用
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class
Program
{
static
void
Main(
string
[] args)
{
Console.WriteLine(
"Redis写入缓存：zhong"
);
RedisCacheHelper.Add(
"zhong"
,
"zhongzhongzhong"
, DateTime.Now.AddDays(1));
Console.WriteLine(
"Redis获取缓存：zhong"
);
string
str3 = RedisCacheHelper.Get<
string
>(
"zhong"
);
Console.WriteLine(str3);
Console.WriteLine(
"Redis获取缓存：nihao"
);
string
str = RedisCacheHelper.Get<
string
>(
"nihao"
);
Console.WriteLine(str);
Console.WriteLine(
"Redis获取缓存：wei"
);
string
str1 = RedisCacheHelper.Get<
string
>(
"wei"
);
Console.WriteLine(str1);
Console.ReadKey();
}
}
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5. 输出结果
