private string LookupCountry()
{
string IP;
bool IsLocal = false;
bool _CacheGeoIPData = true;
string _GeoIPFile;
_GeoIPFile = "controls/CountryListBox/Data/GeoIP.dat";
if (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 = Page.Request.UserHostAddress;
}
else
{
//Set the IP address so we can find the country
IP = Page.Request.UserHostAddress;
}
//Check to see if we need to generate the Cache for the GeoIPData file
if (Context.Cache.Get("GeoIPData") == null && _CacheGeoIPData)
{
//Store it as well as setting a dependency on the file
Context.Cache.Insert("GeoIPData", CountryLookup.FileToMemory(Context.Server.MapPath(_GeoIPFile)), new CacheDependency(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) Context.Cache.Get("GeoIPData"));
}
else
{
//No, get it from file
_CountryLookup = new CountryLookup(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;
}
protected override void OnDataBinding( EventArgs e )
{
bool isLocal = false;
if( ! Page.IsPostBack )
{
//If GeoIPFile is not provided, assume they put it in BIN.
if( String.IsNullOrEmpty( _GeoIPFile ) )
{
_GeoIPFile = "controls/CountryListBox/Data/GeoIP.dat";
}
EnsureChildControls();
//Check to see if a TestIP is specified
string ipAddress;
if( !String.IsNullOrEmpty(_TestIP) )
{
//TestIP is specified, let's use it
ipAddress = _TestIP;
}
else 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
ipAddress = this.Page.Request.UserHostAddress;
}
else
{
//Set the IP address so we can find the country
ipAddress = this.Page.Request.UserHostAddress;
}
//Check to see if we need to generate the Cache for the GeoIPData file
if( Context.Cache.Get( "GeoIPData" ) == null && _CacheGeoIPData )
{
//Store it as well as setting a dependency on the file
Context.Cache.Insert( "GeoIPData", CountryLookup.FileToMemory( Context.Server.MapPath( _GeoIPFile ) ), new CacheDependency( Context.Server.MapPath( _GeoIPFile ) ) );
}
//Check to see if the request is a localhost request
//and see if the LocalhostCountryCode is specified
if( isLocal && !String.IsNullOrEmpty(_LocalhostCountryCode) )
{
//Bing the data
base.OnDataBinding( e );
//Pre-Select the value in the drop-down based
//on the LocalhostCountryCode specified.
if( !Convert.ToBoolean( this.Items.FindByValue( _LocalhostCountryCode ) == null ) )
{
this.Items.FindByValue( _LocalhostCountryCode ).Selected = true;
}
}
else
{
//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)Context.Cache.Get( "GeoIPData" ) );
}
else
{
//No, get it from file
_CountryLookup = new CountryLookup( Context.Server.MapPath( _GeoIPFile ) );
}
//Get the country code based on the IP address
string _UserCountryCode = _CountryLookup.LookupCountryCode( ipAddress );
//Bind the datasource
base.OnDataBinding( e );
//Make sure the value returned is actually
//in the drop-down list.
if( !Convert.ToBoolean( this.Items.FindByValue( _UserCountryCode ) == null ) )
{
//Yes, it's there, select it based on its value
this.Items.FindByValue( _UserCountryCode ).Selected = true;
}
else
{
//No it's not there. Let's get the Country description
//and add a new list item for the Country detected
string _UserCountry = _CountryLookup.LookupCountryName( ipAddress );
if( _UserCountry != "N/A" )
{
ListItem newItem = new ListItem();
newItem.Value = _UserCountryCode;
newItem.Text = _UserCountry;
this.Items.Insert( 0, newItem );
//Now let's Pre-Select it
this.Items.FindByValue( _UserCountryCode ).Selected = true;
}
}
}
}
}
