ASP.NET C# Sending Information Back to Client While Processing Web Page

Question

Hi,

Not sure if I'll explain this properly but here goes. I having written an asp.net app using C# for the code behind. After the user makes some selection and hits the "run" button I pass off the processing to a dll written in C# but what I want is a way to periodically send information back to the client so they can see what's going on like how many records have been processed and things like that. How can I accomplish this?

thanks

Answer 1

Have a look at Provide feedback to the user on Long Running Tasks – using loader image - MS AJAX and JQuery

Also: How Do I: Use the ASP.NET AJAX UpdateProgress Control?

Answer 2

There are many ways of accomplishing this kind of task. I am presenting a few ideas

Solution 1:

You can use Ajax Timer Control.

Solution 2:

Make a Windows Service that will read the information and will interact with the asp.net application to notify about the requested information. It will act as a background worker.

Hope this helps

Answer 3

This may have been my wording of the question but I found what I was looking for. You can use the HttpResponse.Flush method to achieve what I was trying to do.

Answer 4

This is often called HTTP Server Push or HTTP Streaming or Long Polling. Depending on how it's done.

You can also check out this SO question on HTTP Streaming...

http://stackoverflow.com/questions/1112413/cross-browser-implementation-of-http-streaming-push-ajax-pattern

Or this one with an example of Long Polling

http://stackoverflow.com/questions/333664/simple-long-polling-example-code

http://stackoverflow.com/questions/tagged/long-polling