由于静态类中无法使用有参构造函数,从而不能使用常规的方式(构造函数获取) 获取服务,我们可以采取通过IApplicationBuilder 获取
1.首先创建一个静态类
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace OnlineTest.Tools
{
public static class ServiceLocator
{
public static IServiceProvider Instance { get; set; }
public static IApplicationBuilder ApplicationBuilder { get; set; }
}
}
2.再去setup中的Configure 方法中获取 IApplicationBuilder 对象
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
//此方法由运行时调用。使用此方法配置HTTP请求管道
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
ServiceLocator.Instance = app.ApplicationServices;
ServiceLocator.ApplicationBuilder = app;
app.UseDeveloperExceptionPage();
app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "知行.Api v1"));
if (env.IsDevelopment())
{
}
}
3.在需要使用的地方直接拿就ok了
var serviceScope= ServiceLocator.ApplicationBuilder.ApplicationServices.CreateScope();
var _dictionaryEntityBL = serviceScope.ServiceProvider.GetService(typeof(IDictionaryEntityBL)) as IDictionaryEntityBL;