C# 如何在静态类中使用IHttpContextAccessor设置Cookie

我试图在静态类中创建一个泛型的

addReplaceCookie

方法。这个方法看起来像这样

public static void addReplaceCookie(string cookieName, string cookieValue)
{

    if ((HttpContext.Current.Request.Cookies(cookieName) == null))
    {
        // add cookie
        HttpCookie s = new HttpCookie(cookieName);
        s.Value = cookieValue;
        s.Expires = DateTime.Now.AddDays(7);
        HttpContext.Current.Response.Cookies.Add(s);
    }
    else {
        // ensure cookie value is correct 
        HttpCookie existingSchoolCookie = HttpContext.Current.Request.Cookies(cookieName);
        existingSchoolCookie.Expires = DateTime.Now.AddDays(7);
        existingSchoolCookie.Value = cookieValue;
        HttpContext.Current.Response.Cookies.Set(existingSchoolCookie);
    }

}

我知道，为了在asp.net核心中获得

HttpContext

，您必须使用

IHttpContextAccessor

。但我不能将其注入到静态类中

有没有其他方法可以访问它

---

我使用的是rc1 final。

如果可能，不要使用

静态类。但如果必须使用，将
IHttpContextAccessor
作为参数发送可能是一种解决方案

public static void addReplaceCookie(string cookieName, string cookieValue, IHttpContextAccessor accessor)
{
   //your code
}
public class CallerClass
{
   private readonly IHttpContextAccessor _accessor;

   public CallerClass(IHttpContextAccessor accessor)
   {
       _accessor = accessor;
       addReplaceCookie(cookieName, cookieValue, accessor);
   }
}

虽然我建议远离这样的静态类场景，但仍然可以实现您的要求

在
Startup.ConfigureServices
方法中，您可以调用
services.BuildServiceProvider（）
以获取
IServiceProvider
以解析所需的类型。这是一个有点黑客，但它的工作

假设一个静态类如

public class MyStaticHelperClass {
    private static IHttpContextAccessor httpContextAccessor;
    public static void SetHttpContextAccessor(IHttpContextAccessor  accessor) {
        httpContextAccessor = accessor;
    }

    public static void addReplaceCookie(string cookieName, string cookieValue) {
        var HttpContext = httpContextAccessor.HttpContext;
        if (HttpContext.Request.Cookies(cookieName) == null) {
            // add cookie
            HttpCookie s = new HttpCookie(cookieName);
            s.Value = cookieValue;
            s.Expires = DateTime.Now.AddDays(7);
            HttpContext.Response.Cookies.Add(s);
        } else {
            // ensure cookie value is correct 
            HttpCookie existingSchoolCookie = HttpContext.Request.Cookies(cookieName);
            existingSchoolCookie.Expires = DateTime.Now.AddDays(7);
            existingSchoolCookie.Value = cookieValue;
            HttpContext.Response.Cookies.Set(existingSchoolCookie);
        }
    }
}

您将在启动期间配置类

public IServiceProvider ConfigureServices(IServiceCollection service) {
    services.AddTransient<IMyService, MyService>();
    services.AddMvc();

    //this would have been done by the framework any way after this method call;
    //in this case you call the BuildServiceProvider manually to be able to use it
    var serviceProvider = services.BuildServiceProvider();

    //here is where you set you accessor
    var accessor = serviceProvider.GetService<IHttpContextAccessor>()
    MyStaticHelperClass.SetHttpContextAccessor(accessor);

    return serviceProvider;
}

…然后可以在服务集合中注册

public void ConfigureServices(IServiceCollection service) {
    services.AddTransient<ICookieService, CookieService>();
    services.AddMvc();
}

这是我在应用程序中管理会话cookie的方法。
在Startup.ConfigureServices中：

services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

services.AddSingleton（）；

稍后启动。通过DI IServiceProvider配置add，并使用它提取IHttpContextAccessor，如下所示：

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider svp)
    {
        IHttpContextAccessor accessor = svp.GetService<IHttpContextAccessor>();
        MyRepository.SetHttpContextAccessor(accessor);

public void配置（IApplicationBuilder应用程序、IHostingEnvironment环境、IServiceProvider svp）
{
IHttpContextAccessor accessor=svp.GetService（）；
SetHttpContextAccessor（accessor）；
因为它是一个静态类，所以你可以创建一个初始化方法，在设置服务集合的过程中接收接口并传递它。太棒了，我想我已经开始了解它了。你知道吗，有没有办法替换asp.net core中的cookie，或者append会自动替换它？你说的append是什么意思？我不确定我在使用它站起来。我通常使用
Response.Cookies.Set（cookie）
，如果这是你的意思。cookie有键和值的地方。是的，出于某种原因Response.Cookies.Set为我抛出了一个错误。我必须使用Response.Cookies.Append（cookieName、cookieValue、CookieOption）；但是那很好。谢谢你的帮助！你能描述一下为什么不推荐静态类用于此场景，以及你推荐的场景是什么吗？
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider svp)
    {
        IHttpContextAccessor accessor = svp.GetService<IHttpContextAccessor>();
        MyRepository.SetHttpContextAccessor(accessor);