Duplicate:
How do I find the referring url that brought a user to my site in ASP.NET?
See Also:
How can I find what search terms (if any) brought a user to my site?
Answers:
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Method 1
Request.UrlReferrer
But this isn’t guaranteed to be correct or even exist.
Method 2
Request.UrlReferrer can be used to retrieve the previous page url from where the current page has been redirected.
Method 3
The referer URL should be in the HTTP headers on the request.
E.g. Uri MyUrl = Request.UrlReferrer
See: http://msdn.microsoft.com/en-us/library/system.web.httprequest.urlreferrer.aspx
Method 4
Request.UrlReferrer
http://msdn.microsoft.com/en-us/library/system.web.httprequest.urlreferrer.aspx
Method 5
HttpContext.Current.Request.UrlReferrer
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0