private string LookupCountry()
{
string IP;
bool IsLocal = false;
bool _CacheGeoIPData = true;
string _GeoIPFile;
_GeoIPFile = "controls/CountryListBox/Data/GeoIP.dat";
if (this.Page.Request.UserHostAddress == "127.0.0.1")
{
// 'The country cannot be detected because the user is local.
IsLocal = true;
// Set the IP address in case they didn't specify LocalhostCountryCode
IP = this.Page.Request.UserHostAddress;
}
else
{
// Set the IP address so we can find the country
IP = this.Page.Request.UserHostAddress;
}
// Check to see if we need to generate the Cache for the GeoIPData file
if (this.Context.Cache.Get("GeoIPData") == null && _CacheGeoIPData)
{
// Store it as well as setting a dependency on the file
this.Context.Cache.Insert("GeoIPData", CountryLookup.FileToMemory(this.Context.Server.MapPath(_GeoIPFile)), new CacheDependency(this.Context.Server.MapPath(_GeoIPFile)));
}
// Check to see if the request is a localhost request
// and see if the LocalhostCountryCode is specified
if (IsLocal)
{
return(Null.NullString);
}
// Either this is a remote request or it is a local
// request with no LocalhostCountryCode specified
CountryLookup _CountryLookup;
// Check to see if we are using the Cached
// version of the GeoIPData file
if (_CacheGeoIPData)
{
// Yes, get it from cache
_CountryLookup = new CountryLookup((MemoryStream)this.Context.Cache.Get("GeoIPData"));
}
else
{
// No, get it from file
_CountryLookup = new CountryLookup(this.Context.Server.MapPath(_GeoIPFile));
}
// Get the country code based on the IP address
string country = Null.NullString;
try
{
country = _CountryLookup.LookupCountryName(IP);
}
catch (Exception ex)
{
Exceptions.LogException(ex);
}
return(country);
}
