2017年就這麼悄無聲息的開始了,2017年對我來說又是特別重要的一年。
元旦放假在家寫了個Asp.net Core驗證碼登錄, 做demo的過程中遇到兩個小問題,第一是在Asp.net Core中引用dll,以往我們引用DLL都是直接引用,在Core裡這樣是不行的,必須基於NuGet添加,或者基於project.json添加,然後保存VS會啟動還原類庫。
第二就是使用Session的問題,Core裡使用Session需要添加Session類庫。
在你的項目上基於NuGet添加:Microsoft.AspNetCore.Session。
在startup.cs找到方法ConfigureServices(IServiceCollection services) 注入Session(這個地方是Asp.net Core pipeline):services.AddSession();
接下來我們要告訴Asp.net Core使用內存存儲Session數據,在Configure(IApplicationBuilder app,...)中添加代碼:app.UserSession();
1、在MVC Controller裡使用HttpContext.Session
using Microsoft.AspNetCore.Http; public class HomeController:Controller { public IActionResult Index() { HttpContext.Session.SetString("code","123456"); return View(); } public IActionResult About() { ViewBag.Code=HttpContext.Session.GetString("code"); return View(); } }
2、如果不是在Controller裡,你可以注入IHttpContextAccessor
public class SomeOtherClass { private readonly IHttpContextAccessor _httpContextAccessor; private ISession _session=> _httpContextAccessor.HttpContext.Session; public SomeOtherClass(IHttpContextAccessor httpContextAccessor) { _httpContextAccessor=httpContextAccessor; } public void Set() { _session.SetString("code","123456"); } public void Get() { string code = _session.GetString("code"); } }
存儲對象時把對象序列化成一個json字符串存儲。
public static class SessionExtensions { public static void SetObjectAsJson(this ISession session, string key, object value) { session.SetString(key, JsonConvert.SerializeObject(value)); } public static T GetObjectFromJson<T>(this ISession session, string key) { var value = session.GetString(key); return value == null ? default(T) : JsonConvert.DeserializeObject<T>(value); } }
var myComplexObject = new MyClass(); HttpContext.Session.SetObjectAsJson("Test", myComplexObject); var myComplexObject = HttpContext.Session.GetObjectFromJson<MyClass>("Test");
1、SQL Server
添加引用 "Microsoft.Extensions.Caching.SqlServer": "1.0.0"
注入:
// Microsoft SQL Server implementation of IDistributedCache. // Note that this would require setting up the session state database. services.AddSqlServerCache(o => { o.ConnectionString = "Server=.;Database=ASPNET5SessionState;Trusted_Connection=True;"; o.SchemaName = "dbo"; o.TableName = "Sessions"; });
2、Redis
添加引用 "Microsoft.Extensions.Caching.Redis": "1.0.0"
注入:
// Redis implementation of IDistributedCache. // This will override any previously registered IDistributedCache service. services.AddSingleton<IDistributedCache, RedisCache>();
http://benjii.me/2016/07/using-sessions-and-httpcontext-in-aspnetcore-and-mvc-core/