DevForce Community Forum : Best way to detect loss of connection? http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2009 : Best way to detect loss of connection? Sat, 11 Apr 2026 15:33:48 -700 Thu, 11 Mar 2010 09:19:26 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=1678 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Best way to detect loss of connection? : To determine whether you can immediately... http://www.ideablade.com/forum/forum_posts.asp?TID=1678&PID=6347#6347 Author: davidklitzke
Subject: 1678
Posted: 11-Mar-2010 at 9:19am

To determine whether you can immediately connect to a database use this EntityManager constructor:
 
Syntax
Visual Basic (Declaration)  
Public Function New( _
   ByVal shouldConnect As Boolean _
)
 
Visual Basic (Usage) Copy Code
Dim shouldConnect As Boolean
 
Dim instance As EntityManager(shouldConnect)
 
C#  
public EntityManager(
   bool shouldConnect
)
 
Parameters
shouldConnect
True if a connection to the EntityServer should be made.
Exceptions
Exception Description
IdeaBlade.Core.IdeaBladeException Thrown for miscellaneous initialization failures
EntityServerException Thrown for connection failures
ArgumentException Thrown in a Silverlight application when BOS is not specified
 
Once you have created an EntityManager, you can check the IsConnected property of the EntityManager:
 
 IsConnected                                             Returns whether the EntityManager is currently connected to an EntityServer.
 
]]> Thu, 11 Mar 2010 09:19:26 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1678&PID=6347#6347 Best way to detect loss of connection? : What's the recommended way... http://www.ideablade.com/forum/forum_posts.asp?TID=1678&PID=6342#6342 Author: chuckc
Subject: 1678
Posted: 10-Mar-2010 at 1:57pm

What's the recommended way to detect absence or loss of a data connection?

I see a number of examples in the documentation dealing with saving and restoring cache contents, but they are all driven by user actions. I'd like to recognize at application start-up that a database connection is not available and immediately restore from a saved cache file. I'd also like to recognized when a connection has been lost during a session, and save cache contents to disk at that time.

Thanks!]]> Wed, 10 Mar 2010 13:57:43 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1678&PID=6342#6342