使用signalr和sqldependency在asp.net核心中进行数据库更改通知

Question

If I made any changes in SQL table row then UI should automatically refresh the new changes without F5 or reloading the browser.

I have already tried this in asp.net mvc and its working good but I'm unable to do in asp.net mvc core..

Answer 1

You are looking for a sql backplane solution which as of now and this github isssue , is not supported under core.

Read that issue for more details. But they are recommending the use of a Redis backplane which is support as in the documentation .

Answer 2

You can detect changes using the SqlDependency class and then broadcast them to registered clients using SignalR. I wrote a sample using pre-Core SignalR, which is available at https://weblogs.asp.net/ricardoperes/broadcasting-database-changes-through-signalr . In order to make it work with ASP.NET Core SignalR you need to retrieve the hub using the service locator (HttpContext.RequestServices.GetService>). Also, there is a change that you must do to the client-side code.