Asynhronic response from Web Service

Posted on 2008-06-26
Last Modified: 2010-04-15
I need to generate XML from myWebService to another Web Service but only when Table.field in database is with value "0". When myWebService get information that "field" is with value "0" or field are inserted, myWebService need to generate XML and change Table.field value to "1".

How would myWebService know when the value of "field" is changed to "0" or inserted in Table with value "0" (I need some methodology which would trigger my Web service at any time when it occurs - Web Service in Web Service).
Some code example would be appropriate.

Question by:novabankaee
  • 2
  • 2
LVL 19

Expert Comment

ID: 21877100

You have several options

1) pooling - creating  a timer object and check for the value each X seconds

2) Use Cache Dependency on the table

3) create a CLR stored procedure that will be called from a trigger on the table

I highly recommend the 2nd option


Author Comment

ID: 21881718
I don't use MS Sql Server so 2nd and 3rd options are not in options.
I use Informix database. This is more database then Visual studio (C#) releated problem. Isn't it?
LVL 19

Accepted Solution

elimesika earned 500 total points
ID: 21891678

OK, than you are left with the 1st option , this is the easiest solution to implement and it might meet your needs if the update rate is not extensive.

Another option, if you have any control on the service that updates the service, you may use messaging to send a message from updating service to the other service.

Author Comment

ID: 21916491
How and where to implement Timer Object in WebServis?

public class MyWebService : System.Web.Services.WebService


        public MyWebService()




        public string WebMethod1()


            //Business Logic


        public void PrivateMethod1()


            //Business Logic



Open in new window


Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Fixing Non-Standard characters in text 8 90
c# LinkButton OnClientClick 2 33
Name space syntax error 12 38
DateTimepicker 4 32
Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

948 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now