Hot to know if url is changed?

Question

Hi can i know by code if a user is entered in a web page by a link or by changing the url in the address bar? Thanks

sacresp · Answer

Look for HTTP_REFERER http header.

thed0ct0r · Answer

I don't understand you... i have a.aspx & b.aspx; in a.aspx there's a link to b.aspx. how may i do in the b.aspx page_load to know if the user is coming from a.aspx or he just type b.aspx in the address bar?

james · Answer

You can send a web request to it and if you get a 404 error code back then the page no longer exists.