在ASP.net中从服务器端使用参数调用客户端JavaScript

Question

I have an ASP.net webpage, that periodically (once in a minute) makes a call to my WCF REST service. My REST service responses some XML data. After getting it I make some further operations on that on server side in my ASP page.Note, this post data process in ASP is required, I can't avoid it. I know my life would be easier without this step, but I must do it.

After I'd like to pass this data in XML format to a client side javascript, that can parse it and show infos to the user based on this data. How can make this call from server side? What is the best pattern/practice to do it?

.net4/VS2010

Answer 1

if you want to call a function that already exists, that will load your data to the screen, you can tell the server to return your data and then ajax will grab that data and call a callback function. if you are not using ajax, you can reload the whole page with the new data.

Answer 2

HTTP is not designed to push data from the server to the client. I'm not really familiar with ASP but usually you have the following possibilities to "push" data to a client javascript application via HTTP:

• page reload via meta refresh (which doesn't actually push data;) )
• periodically polling an "job queue" URL using javascript
• comet (see http://en.wikipedia.org/wiki/Comet_(programming )) for an overview)
• Web Sockets (which actually pushes data to the client but is only supported by newer browsers)

I've been using atmosphere (http://atmosphere.java.net/) which works pretty well in java application containers, which provides an abstraction layer over the underlying technology. I don't know if there is something similar out there in the ASP-world.

cheers Martin

Answer 3

汤姆，在这种情况下，请执行以下操作