多数据库同一个方法

Question

我的应用程序有 2 个数据库，Db1（有 tabledbo.Student）和 Db2（有 tabledbo.School）。我创建了 2 个 AppService 来访问它们当我试图从他们两个那里获取数据时，它只使用到 Db1 的连接（在当前上下文中找不到 table dbo.School）。那么如何同时从Db1和Db2获取数据呢

private readonly IStudentAppService _studentAppService;
private readonly ISchoolAppService _schoolAppService;

public BranchAccountController(IStudentAppService studentAppService,
ISchoolAppService schoolAppService)
{
     _studentAppService = studentAppService;
     _schoolAppService = schoolAppService;
}

public async Task<PartialViewResult> GetStudent(int? id)
{           
     //Repository 1 (Database 1)
     var student = await _studentAppService.GetStudentForEdit(new NullableIdDto { Id = id });
     //Repository 2 (Database 2)
     var school = await _schoolAppService.GetSchoolList();

     //bla bla      
}

Update 1: I tried to get the school before student and face the below error: The transaction passed in is not associated with the current connection. Only transactions associated with the current connection may be used.

Answer 1

你必须Begin分开工作单元：

public async Task<PartialViewResult> GetStudent(int? id)
{           
    List<SchoolDto> schools;
    StudentDto student;

    using (var uow = UnitOfWorkManager.Begin(TransactionScopeOption.Suppress))
    {
        // Repository 1 (Database 1)
        student = await _studentAppService.GetStudentForEdit(new NullableIdDto { Id = id });
        uow.Complete();
    }

    using (var uow = UnitOfWorkManager.Begin(TransactionScopeOption.Suppress))
    {
        // Repository 2 (Database 2)
        schools = await _schoolAppService.GetSchoolList();
        uow.Complete();
    }

    // ...
}

多数据库同一个方法

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