MsSQL callback function to asp.net website [closed]

Answer 1

SQL Server supports event notifications for just this type of problem.

http://msdn.microsoft.com/en-us/library/ms190427(v=sql.105).aspx

Answer 2

SQL Server has CLR integration (albeit at last check, only with .NET 2.0). This means you can run some assembly marked as such from a function/stored-procedure/query. Here is the documentation:

MSDN SQL Server CLR description

You can write an assembly with an exposed method for SQL Server and run it directly from there, thus completing your loop in C#/VB/.NET language of your choosing. This may be a little heavy handed if none of the above answers have what you're looking for, but I'm pretty sure offers the most flexible approach where you control everything.

Answer 3

If it's data that you want to put in the application cache then you could consider using the SqlCacheDependency class (http://msdn.microsoft.com/en-us/library/ms178604(v=vs.100).aspx). This will expire the cache when there is a predefined change in the database thus avoiding the need for any kind of polling.

Of course it depends what your exact problem is to whether this will meet your needs