This blog post will explain various ways by which the .NET developers can get user’s IP address using ASP.NET and C#.
How to get User’s IP Address using ASP.NET and C# ?
There are 3 different ways which you can use to fetch the IP address using C#.
- Request.ServerVariables & REMORE_ADDR
- Request.ServerVariables & HTTP_X_FORWARDED_FOR
The IP Address can be retreived in the following ways.
String str = HttpContext.Current.Request.UserHostAddress;
The REMOTE_ADDR usually provides the IP Address of the Internet Service Provider in some cases.As a result it may be required to test with HTTP_X_FORWARDED_FOR to get the real IP Address.This might also contain an array of IP addresses when connected through proxies.
and check to see if it returns an Empty and then retreive the corresponding IP Address using REMOTE_ADDR.