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client side event handling in asp.net

Posted By:      Posted Date: September 08, 2010    Points: 0   Category :ASP.Net
 
i should handle a event whn my focus chages from one text box to other......   [  i should get an error as you are not entered the data(it should accept only numbers)  ]


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Notify jquery from server (trigger an asynchronous client side event from the server).

  

Hello,

I want to have a code that would establish connection from the server to the jQuery client, to update the front page of the website, when some new data is added to the DB. I of course could have an ajax call from the client on every second to check up the database for any changes, but I am just wondering if there is any way to establish a connection from the server side to the client.

The perfect solution would work like that:

- when the page is open, the client registers itself on the server for changes

- the server (knowing all the registered clients) prompts all of them when a change is done

- if any of the clients does not respond, the server removes the client from the registered list

- clients, update the page contents with the new data from the server

The question is if it is possible? Again, I could make all the clients reconnect to the server every second using ajax, however, this does not seem like a clean solution, and additionally it would put an unnecessary load on the server (e.q. 100 clients requesting update every second).

Thanks in advance,

Jozef A. Habdank


Handling the Same Event In More Than One Client

  

Is it possible to handle the same event in more than one client without using Remoting or WCF?  In my test example I have 2 console apps and a class library all in the same solution.  The event lives in a Singleton class in the class library and both console apps have a reference to the dll and have handlers for the event.  I have the 2 console apps set as multiple startup projects; however the event appears to only be firing to the one that is "active".  If I could get confirmation on whether what I'm trying is not possible (or whether I'm going about it the wrong way) it would be much appreciated.

Thanks,

-Dave


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