2017年就这么悄无声息的开始了,2017年对我来说又是特别重要的一年。
元旦放假在家写了个Asp.net Core验证码登录, 做demo的过程中遇到两个小问题,第一是在Asp.net Core中引用dll,以往我们引用DLL都是直接引用,在Core里这样是不行的,必须基于NuGet添加,或者基于project.json添加,然后保存VS会启动还原类库。
第二就是使用Session的问题,Core里使用Session需要添加Session类库。
添加Session
在你的项目上基于NuGet添加:Microsoft.AspNetCore.Session。
修改startup.cs
在startup.cs找到方法ConfigureServices(IServiceCollection services) 注入Session(这个地方是Asp.net Core pipeline):services.AddSession();
接下来我们要告诉Asp.net Core使用内存存储Session数据,在Configure(IApplicationBuilder app,...)中添加代码:app.UserSession();
Session
1、在MVC Controller里使用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里,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"
);
}
}
存储复杂对象
存储对象时把对象序列化成一个json字符串存储。
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"
);
使用SQL Server或Redis存储
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>();
原文地址:https://www.cnblogs.com/jiangyunfeng/p/11762046.html