/// <summary>获取缓存项，不存在时返回默认值</summary>
/// <param name="key">键</param>
/// <returns></returns>
public T Get <T>(string key)
{
// 尝试获得值
if (_cache.TryGetValue(key, out var item) || item != null)
{
item.Alive = DateTime.Now.Ticks; // 设置活跃时间
if (_jsonSerialize) // 启用了Json序列化
{
return(Json.Json.Deserialize <T>(item.Value.ToString())); // 尝试转换回指定类型
}
else
{
return(TypeConvert.C2Type <T>(item.Value)); // 尝试转换回指定类型
}
}
return(default);
/// <summary>
/// 尝试将结果转换成目标类型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="result"></param>
/// <returns></returns>
private T TryConvertType <T>(object result)
{
// 取第一项
object value;
if (result is IList <object> rs)
{
value = rs.FirstOrDefault();
}
else
{
value = result;
}
// 转换字符串
if (value is string str)
{
try
{
switch (str)
{
case "OK": return((T)Commands.Ok);
case "PONG": return((T)Commands.Ok);
}
return(TypeConvert.C2Type <T>(str));
}
catch (Exception e)
{
throw new RedisClientException($"将字符串({value})转为类型({typeof(T).Name})失败({e.Message})", MethodBase.GetCurrentMethod());
}
}
// 转换字节
if (value is byte[] byts)
{
try
{
object retVal;
TypeCode typeCode = Type.GetTypeCode(typeof(T));
switch (typeCode)
{
case TypeCode.Object: retVal = ObjectConvert.C2Obj <T>(byts); break;
case TypeCode.String: retVal = ObjectConvert.C2Str(byts); break;
case TypeCode.DateTime: retVal = ObjectConvert.C2Date(byts); break;
case TypeCode.Decimal: retVal = ObjectConvert.C2Dec(byts); break;
case TypeCode.Double: retVal = ObjectConvert.C2Dbl(byts); break;
case TypeCode.Single: retVal = ObjectConvert.C2Flt(byts); break;
case TypeCode.Int64: retVal = ObjectConvert.C2Lng(byts); break;
case TypeCode.Int32: retVal = ObjectConvert.C2Int(byts); break;
case TypeCode.Int16: retVal = ObjectConvert.C2Short(byts); break;
case TypeCode.UInt64: retVal = ObjectConvert.C2Lng(byts); break;
case TypeCode.UInt32: retVal = ObjectConvert.C2Int(byts); break;
case TypeCode.UInt16: retVal = ObjectConvert.C2Short(byts); break;
case TypeCode.Byte: retVal = ObjectConvert.C2Byte(byts); break;
case TypeCode.SByte: retVal = ObjectConvert.C2SByte(byts); break;
case TypeCode.Char: retVal = ObjectConvert.C2Chr(byts); break;
case TypeCode.Boolean: retVal = ObjectConvert.C2Bool(byts); break;
default: retVal = TypeConvert.C2Type <T>(byts); break;
}
return((T)retVal);
}
catch (Exception e)
{
throw new RedisClientException($"将结果转换成类型({typeof(T).Name})失败({e.Message})", MethodBase.GetCurrentMethod());
}
}
return(default);