Hi,use below code,hope it will help you
string url = HttpContext.Current.Request.Url.AbsoluteUri;
string path = HttpContext.Current.Request.Url.AbsolutePath;
string host = HttpContext.Current.Request.Url.Host;
Response.Write(url);
Response.Write("<br />");
Response.Write(host);
Response.Write("<br />");
Response.Write(path);