【SqlSugarCore】SqlSugarScope的异步上下文问题

前言

在使用SqlSugarCore时，偶尔会出现报错：

English Message : Connection open error . A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - 远程主机强迫关闭了一个现有的连接。)

去SqlSugarCore官网寻找答案，看到了这个文章，随即有了下面的测试

https://www.donet5.com/Ask/9/13824

测试

环境

Core3.1的控制台程序

引用了SqlSugarCore-5.0.3.4类库

using ConTestSqlSugar.Models;
using SqlSugar;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace ConTestSqlSugar
{
    class Program
    {
        static void Main(string[] args)
        {
            _ = TestAsync();

            Console.ReadKey();
        }

        static async Task TestAsync()
        {
            SqlSugarScope sqlSugarScope = new SqlSugarScope(new ConnectionConfig()
            {
                DbType = DbType.SqlServer,
                ConnectionString = "server=.;database=TestDB;uid=sa;pwd=123456;",
                IsAutoCloseConnection = true,
                InitKeyType = InitKeyType.Attribute
            });

            var data = sqlSugarScope.Queryable<UserInfo>().ToList();

            Console.WriteLine("   run-1--->:" + sqlSugarScope.ContextID);

            await Task.Run(() =>
            {
                Console.WriteLine(" await-2--->:" + sqlSugarScope.ContextID);
            });

            await Task.Run(() =>
            {
                Console.WriteLine(" await-5--->:" + sqlSugarScope.ContextID);
            });

            {
                Thread thread = new Thread(() =>
                {
                    Console.WriteLine("thread-3--->:" + sqlSugarScope.ContextID);
                });
                thread.IsBackground = true;
                thread.Start();
            }

            await Task.Run(() =>
            {
                Console.WriteLine(" await-6--->:" + sqlSugarScope.ContextID);
            });

            {
                Thread thread = new Thread(() =>
                {
                    Console.WriteLine("thread-8--->:" + sqlSugarScope.ContextID);
                });
                thread.IsBackground = true;
                thread.Start();
            }

            await Task.Run(() =>
            {
                Console.WriteLine(" await-7--->:" + sqlSugarScope.ContextID);
            });

            Console.WriteLine("   run-4--->:" + sqlSugarScope.ContextID);

            {
                Thread thread = new Thread(() =>
                {
                    Console.WriteLine("thread-9--->:" + sqlSugarScope.ContextID);
                });
                thread.IsBackground = true;
                thread.Start();
            }
        }
    }
}

Debug模式

     run-1--->:6f7930b6-5a51-445c-b470-722bcebfb1f1
  await-2--->:33038044-0d1e-433e-b078-707eae5f37bf
  await-5--->:e755c4be-5e63-47a3-a21f-4ce9c51e47f2
  await-6--->:33038044-0d1e-433e-b078-707eae5f37bf
thread-3--->:482f0e69-4ffa-4ec6-8a04-333b2d146edd
  await-7--->:e755c4be-5e63-47a3-a21f-4ce9c51e47f2
thread-8--->:661c6ecd-394b-4e45-b121-1f94bcc4ec0c
     run-4--->:6f7930b6-5a51-445c-b470-722bcebfb1f1
thread-9--->:7d84a287-8988-4ba1-b97c-e64ea4e26605

Release模式

     run-1--->:d06d78fd-3737-4a4d-916d-8cc237a3656b
  await-2--->:dd1f3f92-90b4-4199-9d94-5af90943149c
  await-5--->:dd1f3f92-90b4-4199-9d94-5af90943149c
  await-6--->:dd1f3f92-90b4-4199-9d94-5af90943149c
thread-3--->:82f1da24-691b-4ae8-90d4-a09053be93f8
  await-7--->:dd1f3f92-90b4-4199-9d94-5af90943149c
thread-8--->:f5b03194-4355-4581-806a-a56c4a8dc14b
     run-4--->:d06d78fd-3737-4a4d-916d-8cc237a3656b
thread-9--->:67820468-ba1a-4eb8-a06d-6c65853e7304

总结

备注：仅是对上面测试的一个小总结，并不是对我一开始的问题的处理方案

1、run

同步运行，拿到的始终是同一个上下文

2、await

（1）Debug模式下，会有多个上下文，但是会拿到重复的上下文

（2）Release模式下，拿到的都是同一个上下文

3、Thread

无论是Debug模式或Release模式，均会拿到不同的上下文