server/aspnetapp/Helper/SessionExtension.cs

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using System;
using Microsoft.AspNetCore.Http;
using Newtonsoft.Json;

namespace aspnetapp.Helper
{
    /// <summary>
    /// Session扩展类
    /// </summary>
    public static class SessionExtension
    {
        /// <summary>
        /// 设置Session对象方法
        /// </summary>
        /// <typeparam name="T">泛型，默认为传入的模型，调用时可不填写</typeparam>
        /// <param name="session">默认当前Session，调用时可不填写</param>
        /// <param name="key">Session键，必填</param>
        /// <param name="obj">实体对象，必填</param>
        public static void SetObjectAsJson<T>(this ISession session, string key, T obj)
        {
            if (session == null)
            {
                return;
            }
            session.SetString(key, JsonConvert.SerializeObject(obj));
            session.CommitAsync().Wait();
        }

        /// <summary>
        /// 获取Session对象方法
        /// </summary>
        /// <typeparam name="T">泛型，指定获取后转成的模型，必填</typeparam>
        /// <param name="session">默认当前Session，调用时可不填写</param>
        /// <param name="key">Session键，必填</param>
        /// <returns>返回得到的指定T模型</returns>
        public static T GetObjectFromJson<T>(this ISession session, string key)
        {
            T result = default(T);
            var value = session.GetString(key);
            if (!String.IsNullOrEmpty(value))
            {
                result = JsonConvert.DeserializeObject<T>(value);
            }
            return result;
        }
    }
}