/// <summary>
/// Ensures a specific key to be either already in the ASP.NET MVC session state or to be newly created
/// </summary>
/// <typeparam name = "T">The generic type to be returned</typeparam>
/// <param name = "state">The session state.</param>
/// <param name = "key">The session state key.</param>
/// <returns>The session state value.</returns>
/// <example>
/// <code>
/// public List<string> StringValues {
/// get { return this.Session.Ensure<List<string>>("StringValues"); }
/// set { this.ViewState.Set("StringValues", value); }
/// }
/// </code>
/// </example>
/// <remarks>
/// Contributed by Michael T, http://about.me/MichaelTran
/// </remarks>
public static T Ensure <T>(this HttpSessionStateBase state, string key) where T : class, new()
{
var value = state.Get <T>(key);
if (value == null)
{
value = new T();
state.Set(key, value);
}
return(value);
}
/// <summary>
/// 从Redis取Session
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="_"></param>
/// <param name="key">键</param>
/// <param name="expire">过期时间，默认20分钟</param>
/// <returns></returns>
public static T GetByRedis <T>(this HttpSessionStateBase _, string key, int expire = 20) where T : class
{
if (HttpContext.Current is null)
{
throw new Exception("请确保此方法调用是在同步线程中执行！");
}
var sessionKey = HttpContext.Current.Request.Cookies["SessionID"]?.Value;
if (!string.IsNullOrEmpty(sessionKey))
{
T obj = default(T);
if (_ != default(T))
{
obj = _.Get <T>(key);
}
if (obj == null)
{
try
{
sessionKey = "Session:" + sessionKey;
using (RedisHelper redisHelper = RedisHelper.GetInstance(1))
{
if (redisHelper.KeyExists(sessionKey) && redisHelper.HashExists(sessionKey, key))
{
redisHelper.Expire(sessionKey, TimeSpan.FromMinutes(expire));
return(redisHelper.GetHash <T>(sessionKey, key));
}
return(default(T));
}
}
catch
{
return(default(T));
}
}
return(obj);
}
return(default(T));
}
public static string GetRoleText(this HttpSessionStateBase state)
{
return(state.Get <string>(KEY_ROLE_TEXT));
}
public static int[] GetRoleIds(this HttpSessionStateBase state)
{
return(state.Get <int[]>(KEY_ROLEID_LIST));
}
public static UserDetails GetUserDetail(this HttpSessionStateBase state)
{
return(state.Get <UserDetails>(KEY_USER_DETAIL));
}
public static string GetUserName(this HttpSessionStateBase state)
{
return(state.Get <string>(KEY_USER_NAME));
}
public static int?GetUserId(this HttpSessionStateBase state)
{
return(state.Get <int?>(KEY_USER_ID));
}
public static ResponseLogin GetCurrentUser(this HttpSessionStateBase Session)
{
var user = (ResponseLogin)Session.Get(GlobalKey.CurrentUser);
return(user);
}