.NET中使用redis
NuGet中安装对应的redis操作工具：StackExchange.Redis
redis帮助类:
/// <summary>
/// Redis读写帮助类
/// </summary>
public class RedisHelper
{
private string RedisConnectionStr = ConfigurationManager.AppSettings["RedisConnectionStr"];
private ConnectionMultiplexer redis { get; set; }
private IDatabase db { get; set; }
public RedisHelper()
{
redis = ConnectionMultiplexer.Connect(RedisConnectionStr);
db = redis.GetDatabase();
}
#region string类型操作
/// <summary>
/// set or update the value for string key
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns></returns>
public bool SetStringValue(string key, string value)
{
return db.StringSet(key, value);
}
/// <summary>
/// 保存单个key value
/// </summary>
/// <param name="key">Redis Key</param>
/// <param name="value">保存的值</param>
/// <param name="expireMinutes">过期时间</param>
/// <returns></returns>
public bool SetStringKey(string key, string value, int expireMinutes = 0)
{
if (expireMinutes > 0)
{
return db.StringSet(key, value, TimeSpan.FromMinutes(expireMinutes));
}
else
return db.StringSet(key, value);
}
/// <summary>
/// 保存一个对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="obj"></param>
/// <returns></returns>
public bool SetStringKey<T>(string key, T obj, int expireMinutes = 0)
{
string json = Newtonsoft.Json.JsonConvert.SerializeObject(obj);
if (expireMinutes > 0)
{
return db.StringSet(key, json, TimeSpan.FromMinutes(expireMinutes));
}
else
return db.StringSet(key, json);
}
/// <summary>
/// 获取一个key的对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public T GetStringKey<T>(string key) where T : class
{
var result = db.StringGet(key);
if (string.IsNullOrEmpty(result))
{
return null;
}
try
{
return Newtonsoft.Json.JsonConvert.DeserializeObject<T>(result);
}
catch
{
return null;
}
}
/// <summary>
/// get the value for string key
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string GetStringValue(string key)
{
return db.StringGet(key);
}
/// <summary>
/// Delete the value for string key
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool DeleteStringKey(string key)
{
return db.KeyDelete(key);
}
#endregion
#region 哈希类型操作
/// <summary>
/// set or update the HashValue for string key
/// </summary>
/// <param name="key"></param>
/// <param name="hashkey"></param>
/// <param name="value"></param>
/// <returns></returns>
public bool SetHashValue(string key, string hashkey, string value)
{
return db.HashSet(key, hashkey, value);
}
/// <summary>
/// set or update the HashValue for string key
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="hashkey"></param>
/// <param name="t">defined class</param>
/// <returns></returns>
public bool SetHashValue<T>(String key, string hashkey, T t) where T : class
{
var json = Newtonsoft.Json.JsonConvert.SerializeObject(t);
return db.HashSet(key, hashkey, json);
}
/// <summary>
/// 保存一个集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="list">数据集合</param>
/// <param name="getModelId"></param>
public void HashSet<T>(string key, List<T> list, Func<T, string> getModelId)
{
List<HashEntry> listHashEntry = new List<HashEntry>();
foreach (var item in list)
{
string json = Newtonsoft.Json.JsonConvert.SerializeObject(item);
listHashEntry.Add(new HashEntry(getModelId(item), json));
}
db.HashSet(key, listHashEntry.ToArray());
}
/// <summary>
/// 获取hashkey所有的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public List<T> HashGetAll<T>(string key) where T : class
{
List<T> result = new List<T>();
HashEntry[] arr = db.HashGetAll(key);
foreach (var item in arr)
{
if (!item.Value.IsNullOrEmpty)
{
result.Add(Newtonsoft.Json.JsonConvert.DeserializeObject<T>(item.Value));
}
}
return result;
}
/// <summary>
/// get the HashValue for string key and hashkey
/// </summary>
/// <param name="key">Represents a key that can be stored in redis</param>
/// <param name="hashkey"></param>
/// <returns></returns>
public RedisValue GetHashValue(string key, string hashkey)
{
RedisValue result = db.HashGet(key, hashkey);
return result;
}
/// <summary>
/// get the HashValue for string key and hashkey
/// </summary>
/// <param name="key">Represents a key that can be stored in redis</param>
/// <param name="hashkey"></param>
/// <returns></returns>
public T GetHashValue<T>(string key, string hashkey) where T : class
{
RedisValue result = db.HashGet(key, hashkey);
if (string.IsNullOrEmpty(result))
{
return null;
}
T t = Newtonsoft.Json.JsonConvert.DeserializeObject<T>(result);
return null;
}
/// <summary>
/// delete the HashValue for string key and hashkey
/// </summary>
/// <param name="key"></param>
/// <param name="hashkey"></param>
/// <returns></returns>
public bool DeleteHashValue(string key, string hashkey)
{
return db.HashDelete(key, hashkey);
}
#endregion
}
webconfig中配置：
<!--Redis连接配置-->
<add key="RedisConnectionStr" value="localhost:6379,DefaultDatabase=0"/>
这里的DefaultDatabase指的是在redis中有15个内存库，其实本质只有一个只是划分为了15个库，由索引下标的方式0~15，在同一个redis服务器中如果有多个redis项目需求，可以分别项目中使用不同的DefaultDatabase
基础使用
//存
RedisHelper redis = new RedisHelper();
redis.SetStringKey("test", 1236, int.Parse("5"));
//取
var val = redis.GetStringValue("test");
labelText.InnerText = val;
