to check file exists on server using javascript

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ASP.NET

Dear All

Can you please tell me how to check wheather file exists on server using javascript

Posted 9-Apr-12 3:44am

mayur csharp G

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Ankur^\m/ · Answer 1 · 2012-04-09T03:52:00

JavaScript is a client side technology and would know nothing about what's there on the server until you do a postback.
There is a technology called AJAX which does exactly what you require. Quoting AJAX definition from Wikipedia[^]:

AJAX an acronym for Asynchronous JavaScript and XML is a group of interrelated web development techniques used on the client-side to create asynchronous web applications. With Ajax, web applications can send data to, and retrieve data from, a server asynchronously (in the background) without interfering with the display and behavior of the existing page. Data is usually retrieved using the XMLHttpRequest object. Despite the name, the use of XML is not needed (JSON is often used instead), and the requests do not need to be asynchronous.

There are many examples for the same on the web. Search Google for "AJAX asp.net" or "jQuery AJAX" (post using jQuery is what lot of people are using these days) to get started.

Hope this helps!

PopeDarren · Answer 2 · 2012-04-09T03:56:00

Solution 2

Building off of Ankur's answer, you can find a good example here

Posted 9-Apr-12 3:56am

PopeDarren

Angel1320 · Answer 3 · 2012-04-09T20:23:00

Solution 3

Agree with Ankur and PopeDarren.
AJAX is the best option for checking file existance.
Use Page.Methods() function in JAVA Script to check existance of file.

Posted 9-Apr-12 20:23pm

Angel1320