1. 首先需要建立一个MSSQL Server数据库，并在ASP.NET Core应用程序中添加对MSSQL Server的连接字符串。
2. 使用EF Core进行数据访问，创建对应的实体类和DbContext。
3. 在Startup.cs文件中注册SignalR，以便在MSSQL Server中发生更改时通知客户端。
4. 在MSSQL Server中创建一个触发器，以便在数据发生更改时调用相关的存储过程。
5. 在存储过程中使用SQL语句查询所需的数据，并使用SignalR向客户端推送更新的数据。

代码示例：

1. 数据库连接字符串

"Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;"

2. 实体类和DbContext

public class MyEntity { public int Id { get; set; } public string Name { get; set; } public string Description { get; set; } }

public class MyDbContext : DbContext { public MyDbContext(DbContextOptions options) : base(options) { }

public DbSet MyEntities { get; set; } }

3. 注册SignalR

public void ConfigureServices(IServiceCollection services) { services.AddDbContext(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

services.AddSignalR(); }

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { app.UseEndpoints(endpoints => { endpoints.MapControllers(); endpoints.MapHub("/myHub"); });

app.UseSignalR(routes => { routes.MapHub("/myHub"); }); }

4. 创建触发器和存储过程

CREATE TRIGGER [dbo].[MyEntities_trigger] ON [dbo].[MyEntities] AFTER INSERT,UPDATE,DELETE AS BEGIN EXEC my_stored_procedure; END

CREATE PROCEDURE my_stored_procedure AS BEGIN DECLARE @changesTable TABLE (ChangeType nvarchar(10), MyEntityId int); INSERT INTO @changesTable (ChangeType, MyEntityId) SELECT CASE WHEN ins.Id IS NOT NULL AND del.Id IS NULL THEN 'INSERT' WHEN del.Id IS NOT NULL AND ins.Id IS NULL THEN 'DELETE' ELSE 'UPDATE' END ChangeType, COALESCE(ins.Id, del.Id) MyEntityId FROM inserted ins FULL OUTER JOIN deleted del ON ins.Id = del.Id;

DECLARE @myEntitiesTable TABLE (Id int, Name nvarchar(50), Description n