netcore中使用HttpContext.Current

新建HttpContext類

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Text;

namespace Web.Common
{
    /// <summary>
    /// http上下文
    /// </summary>
    public class HttpContext
    {
        private static IHttpContextAccessor _contextAccessor;

        /// <summary>
        /// 當前上下文
        /// </summary>
        public static Microsoft.AspNetCore.Http.HttpContext Current => _contextAccessor.HttpContext;


        public static void Configure(IHttpContextAccessor contextAccessor)
        {
            _contextAccessor = contextAccessor;
        }
    }
}

然後在netcore web項目的Startup.cs文件中分別增加配置

        public void ConfigureServices(IServiceCollection services) 
        {
            services.AddSingleton<Microsoft.AspNetCore.Http.IHttpContextAccessor, Microsoft.AspNetCore.Http.HttpContextAccessor>();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env) 
        {            
            Web.Common.HttpContext.Configure(app.ApplicationServices.GetRequiredService<Microsoft.AspNetCore.Http.IHttpContextAccessor>());
        }

此外，.netcore中獲取get查詢參數方式也有區別，不再使用QueryString，而是：

var name= request.Query["name"].FirstOrDefault();