无法在ASP.Net vNext项目中使用会话 [英] Unable to use session in ASP.Net vNext Project

问题描述

我有一个使用Session的ASP.Net vNext项目.但是我在尝试获取/设置会话中的值时遇到此错误.

I have an ASP.Net vNext project that uses Session. But I am getting this error while trying to get/set values in the session.

Microsoft.AspNet.Http.Core.dll中发生类型'System.InvalidOperationException'的异常，但未在用户代码中处理

An exception of type 'System.InvalidOperationException' occurred in Microsoft.AspNet.Http.Core.dll but was not handled in user code

其他信息:尚未为此应用程序或请求配置会话.

Additional information: Session has not been configured for this application or request.

这是我的控制器方法:

    [AllowAnonymous]
    [HttpGet("/admin")]
    public IActionResult Index()
    {
        if (Context.Session.GetString("UserName") == null) // error thrown here
        {
            return RedirectToAction("Login");
        }

        return View();
    }

我也在project.json文件中添加了KVM软件包"Microsoft.AspNet.Session": "1.0.0-beta3"，并已配置我的应用程序以通过我的Startup.cs使用会话，如下所示:

I have added the KVM package "Microsoft.AspNet.Session": "1.0.0-beta3" in my project.json file as well and have configured my application to use session via my Startup.cs like so:

public void ConfigureServices(IServiceCollection services)
{
    // code removed for brevity
    services.AddCachingServices();
    services.AddSessionServices();
}

public void Configure(IApplicationBuilder app)
    {
        app.UseMvc();
        app.UseInMemorySession(configure: s => s.IdleTimeout = TimeSpan.FromMinutes(30));
    }

我看过Github上的vNext文档，但是它没有提供有关ASP.Net会话的大量信息.我在做什么错了?

I have looked at the vNext documentation on Github but it does not provide much information about ASP.Net sessions. What am I doing wrong?

推荐答案

所以我弄清楚了.解决方法实际上非常简单.由于ASP.Net将中间件顺序地添加到请求管道中，因此我需要做的就是在使用MVC之前使用会话中间件.此处的更多信息: https://stackoverflow.com/a/29569746/832546

So I figured this out. The fix was quite simple actually. Since ASP.Net adds the middlewares sequentially into the request pipeline, all I needed to do was use the session middleware before using MVC. More info here: https://stackoverflow.com/a/29569746/832546

固定代码:

public void Configure(IApplicationBuilder app)
{
    app.UseInMemorySession(configure: s => s.IdleTimeout = TimeSpan.FromMinutes(30));
    app.UseMvc();
}

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