.NETCore和.NET5 MVC使用 Session

// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
	services.AddControllersWithViews();
	
	// 启用session
	services.AddSession();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
	if (env.IsDevelopment())
	{
		app.UseDeveloperExceptionPage();
	}
	else
	{
		app.UseExceptionHandler("/Home/Error");
		// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
		app.UseHsts();
	}
	app.UseHttpsRedirection();
	app.UseStaticFiles();
	
	// 使用Session
	app.UseSession();

	app.UseRouting();

	app.UseAuthorization();

	app.UseEndpoints(endpoints =>
	{
		endpoints.MapControllerRoute(
			name: "default",
			pattern: "{controller=Home}/{action=Index}/{id?}");
	});
}

/// <summary>
/// 判断用户是否已经登录(解决Session超时问题)
/// </summary>
public bool IsUserLogin()
{
	//如果Session为Null
	string str = HttpContext.Session.GetString(GZKeys.SESSION_USER);
	if (!String.IsNullOrWhiteSpace(str))
	{
		return true;
	}
	return false;
}

HttpContext.Session.SetString(GZKeys.SESSION_USER, "true");