创建基本上下文并将所有设置包含在其中,DBSET:
public abstract class BaseContext : DbContext
{
public BaseContext(DbContext options)
: base(options)
{ }
public DbSet<object> FirstDbSet { get; set; }
...
}
继承BaseContext用于两个数据库(DBs):
public class NavaContext : BaseContext
{
public NavaContext (DbContext<NavaContext> options) : base(options)
{
}
}
public class StackContext : BaseContext
{
public StackContext(DbContext<StackContext> options) : base(options)
{
}
}
并在Startup.cs
中注册两者:
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.AddDbContext<NavaContext>(options => options.UseSqlServer(Configuration.GetConnectionString("LATAMConnectionString")));
services.AddDbContext<StackContext>(options => options.UseSqlServer(Configuration.GetConnectionString("EUConnectionString")));
var builder = new ContainerBuilder();
builder.RegisterType<NavaContext>().As<BaseContext>();
builder.RegisterType<StackContext>().As<BaseContext>();
builder.Populate(services);
return new AutofacServiceProvider(builder.Build());
}
在appsettings.json
中添加连接字符串:
"ConnectionStrings": {
"NavaConnectionString": "Server=(localdb)\\mssqllocaldb
"StackConnectionString": "Server=(localdb)\\mssqllocaldb
}
现在,您可以注入两个上下文:
public class ReportRepository : IReportRepository
{
private readonly NavaContext latamDbContext;
private readonly StackContext euDbContext;
public ReportRepository(NavaContext latamDbContext, StackContext euDbContext)
{
this.latamDbContext = latamDbContext;
this.euDbContext = euDbContext;
}
}
或者如果您计划注入上下文的集合
:
public class ReportRepository : IReportRepository
{
private readonly ICollection<BaseContext> dbContexts;
public ReportRepository(ICollection<BaseContext> dbContexts)
{
this.dbContexts = dbContexts;
}
}
要访问特定上下文:
var _stackContext= dbContexts.FirstOrDefault(x => x is StackContext) as StackContext;
var _navaContext= dbContexts.FirstOrDefault(x => x is NavaContext) as NavaContext;