C# 收到异常时在Startup.cs文件中使用Configure（）中的IEmailSender

当我收到异常时，我想在Startup.cs文件中的Configure方法中发送一封电子邮件

在应用程序的其余部分，我正在使用并在Startup.cs文件中注册它，就像这样

public void ConfigureServices(IServiceCollection services)
{
    services.AddTransient<IEmailSender, EmailSender>();
}

---

从上下文中提取服务提供者，并使用它来解析所需的类型

public void Configure(IApplicationBuilder app, IHostingEnvironment env, Seed seeder) {

    //...

    app.UseExceptionHandler(errorApp  => { 
        errorApp.Run(async context => {
            IServiceProvider services = context.RequestServices;
            IEmailSender emailSender = services.GetRequiredService<IEmailSender>();
            UserExceptionOptions options = services.GetRequiredService<IOptions<UserExceptionOptions>>().Value;

            await emailSender.SendEmailAsync(options.ExceptionEmailAddress, "some subject", "hey an exception error!");
        });
    });

    //...
}

public void配置（IApplicationBuilder应用程序、IHostingEnvironment环境、种子播种机）{
//...
app.UseExceptionHandler（errorApp=>{
errorApp.Run（异步上下文=>{
IServiceProvider服务=context.RequestServices；
IEmailSender=services.GetRequiredService（）；
UserExceptionOptions=services.GetRequiredService（）.Value；
等待emailSender.SendEmailAsync（options.ExceptionEmailAddress，“某些主题”，“嘿，异常错误！”）；
});
});
//...
}

然后，可以根据需要使用已解析的服务

public void Configure(IApplicationBuilder app, IHostingEnvironment env, Seed seeder) {

    //...

    app.UseExceptionHandler(errorApp  => { 
        errorApp.Run(async context => {
            IServiceProvider services = context.RequestServices;
            IEmailSender emailSender = services.GetRequiredService<IEmailSender>();
            UserExceptionOptions options = services.GetRequiredService<IOptions<UserExceptionOptions>>().Value;

            await emailSender.SendEmailAsync(options.ExceptionEmailAddress, "some subject", "hey an exception error!");
        });
    });

    //...
}