哪种技术可以在不更改URL的情况下更改页面内容？

Question

I have seen this on some survey websites. What is the C# code they use on the client side to keep the URL same, but when clicking the "Next" button, the same aspx page is maintained

1. without having any query string;
2. without any change even a character in the url; and
3. the grid, the data , the content, the questions keep changing?

Can anyone give a code-wise example how to achieve this?

My main query is how is this done in code-behind to change data of page and maintain same url.

Answer 1

Nothing simpler that a session, maintainted at the server side. Store a "current question number" in session, increment it at each succesfull postback and you have what you ask about.

Another possibility - a cookie which contains "current question number".

Both cookie and session are invisible in the query string of course.

Answer 2

"change data of page and maintain same url." Answer is Server.Transfer . This method will preserve url.

Answer 3

The Next button may submit a form using the HTTP POST method. The form data may contain the session, question and response data. The site uses that to build a new response. Unlike a GET, a POST does not incorporate data into the URL.

Answer 4

Developers will typically accomplish this task by using AJAX. The basic premise behind it is that only a certain portion of the page (eg a grid or content area) will make a server call and retrieve the results (using Javascript). The effect achieved is that there has not been a full post back, which is why you don't see the URL or parameters changing.

It is possible to do this using jQuery, pure Javascript, or Microsoft's UpdatePanel .

oleksii's comment has some good links as well:

That's the AJAX magic. There are many JQuery plugings for this, for example this one with a live demo . You can also program it easily using JQuery Get or Post or any other wrapper that use XmlHttpRequest object.