Net Core 中WebAPI有关 Session的设置

原文地址：https://www.cnblogs.com/for-easy-fast/p/12157664.html

Net Core 中WebAPI有关 Session的设置,及获取
步骤一: 在Startup 文件中做相应的设置

ConfigureServices方法里添加

//ConfigureServices添加：

services.AddSession(options =>
{
options.Cookie.Name = ".AdventureWorks.Session";
options.IdleTimeout = System.TimeSpan.FromSeconds(120);//设置session的过期时间
options.Cookie.HttpOnly = true;//设置在浏览器不能通过js获得该cookie的值
});
services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
services.AddHttpContextAccessor();
#region 跨域
services.AddCors(options =>
options.AddPolicy("AllowSameDomain",
builder => builder.WithOrigins().AllowAnyMethod().AllowAnyHeader().AllowAnyOrigin().AllowCredentials()));
#endregion
//HttpContextAccessor 默认实现了它简化了访问HttpContext
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

Configure方法里面添加

app.UseSession();//UseSession配置在UseMvc之前
二 在具体的Control配置相应数据

1. 配置 并获取httpcontext

示例:

public class HomeController : Controller
{
private IHttpContextAccessor _accessor;
public HomeController(IHttpContextAccessor accessor)
{
_accessor = accessor;
}
public IActionResult Index()
{
var httpcontext = _accessor.HttpContext;
return View();
}
}

2. 写SessionHelper类

   public class SessionHelper
   {
   private IHttpContextAccessor _accessor;

   private ISession _session ;
   private IRequestCookieCollection _requestCookie ;
   private IResponseCookies _responseCookie;
   public SessionHelper(HttpContext context)
   {
       _session = context.Session;
       _requestCookie = context.Request.Cookies;
       _responseCookie = context.Response.Cookies;
   }
   /// <summary>
   /// 设置session值
   /// </summary>
   /// <param name="session"></param>
   /// <param name="key">键</param>
   /// <param name="value">值</param>
   public  void SetSession(string key, string value)
   {
       var bytes = System.Text.Encoding.UTF8.GetBytes(value);
       _session.Set(key, bytes);
   }
   /// <summary>
   /// 获取Session值
   /// </summary>
   /// <param name="key"></param>
   /// <returns></returns>
   public  string GetSession(string key)
   {
       Byte[] bytes;
       _session.TryGetValue(key, out bytes);
       var value = System.Text.Encoding.UTF8.GetString(bytes);
   
       if (string.IsNullOrEmpty(value))
       {
           value = string.Empty;
       }
       return value;
   }
   ///// <summary>
   ///// 设置本地cookie
   ///// </summary>
   ///// <param name="key">键</param>
   ///// <param name="value">值</param>
   ///// <param name="minutes">过期时间</param>
   //public void SetCookies(string key,string value,int day = 1)
   //{
   //    _responseCookie.Append(key, value, new CookieOptions
   //    {
   //        Expires = DateTime.Now.AddDays(day)
   //    }) ;
   //}
   //public void  DeleteCookies(string key)
   //{
   //    _responseCookie.Delete(key);
   //}
   //public string GetCookiesValue(string key)
   //{
   //    _requestCookie.TryGetValue(key, out string value);
   //    if (string.IsNullOrEmpty(value))
   //    {
   //        value = string.Empty;
   //    }
   //    return value;
   //}
   

   }

3. 方法里调用sessionHelper

               var httpContext = _accessor.HttpContext;
               SessionHelper session = new SessionHelper(httpContext);
               string key = "王明";
               string value = "2020年 大运年";
               //设置session值
               session.SetSession(key, value);
               //获取session值
               session.GetSession(key);