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Redirect Web Visitors By Country Using .NET Framework in C# or VB.NET
There are times when it is useful to redirect to a different default web page based on the visitor’s country of origin. One practical use is to redirect a visitor to a web page in a language recognized by the visitor.
This article shows you how this can be done using a .NET component.
Let’s take a simple example. Company XYZ is a multinational company with major customers from the United States and Japan. The company’s official website is available in both English and Japanese. The default page is in English and the visitor can switch to Japanese by changing the default language option. A potential problem exists when a Japanese visitor does not understand English and cannot navigate the website. So, let’s come up with a simple solution to help XYZ company redirect all their internet traffic from Japan country to Japanese language site. At the same time, it drives the rest of the traffic to the English site.
In this example, we use the fully functional IP2Location(TM) .NET component available at http://www.ip2location.net/download/IP2LocationDotNetComponent.ZIP to query the visitor’s IP address and country. First, install the IP2Location(TM) .NET component. The IP2Location(TM) .NET component will be installed on your local drive. Next, get the IP2Location.DLL .NET component and the sample database from the directory ie. c:Program FilesIP2Location by default. You must add a reference to this component from your Visual Studio web project. A copy of this component will be copied to the /bin folder under the project. One in ten requests for an unregistered component has a random 5 second delay.
Let’s assume the English web page as index_en.htm and the Japanese web page as index_jp.htm. We use a simple default.asp script to detect the visitor’s country of origin. If the visitor is from Japan, redirect them to index_jp.htm, otherwise index_en.htm. Simple? Here is the code and comments to serve as an explanation for default.asp.
Sample Codes in a VB.NET Webform
—————————————
Imports IP2Location
Private SubQuery ( ByVal strIPAddress As String )
Dimension OIPResult As New IP2Location.IPResult
try it
If strIPAddress “” Then
IP2Location.Component.IPDatabasePath = “C:Program FilesIP2LocationDatabaseIP-COUNTRY.SAMPLE.BIN”
oIPResult = IP2Location.Component.IPQuery(strIPAddress)
Select Case oIPResult.Status
Case “OK”
If oIPresult.CountryShort = “JP” Then
‘ The visitor is from Japan
‘ Redirect URL to index_jp.htm
Response.Redirect(“index_jp.htm”)
Other
The visitor is not from Japan
‘ Redirect URL to index_en.htm
Response.Redirect(“index_en.htm”)
If it ends
Case “EMPTY_IP_ADDRESS”
Response.Write(“The IP address cannot be empty.”)
case “INVALID_IP_ADDRESS”.
Response.Write(“Invalid IP address.”)
Case “MISSING_FILE”.
Response.Write(“Invalid database path.”)
Finish the selection
Other
Response.Write(“The IP address cannot be empty.”)
If it ends
Catch the past as an exception
Write Reply (eg Message)
Finally
oIPResult = Nothing
End the test
Last Sub
Sample Codes in C# Webform
———————————-
Using IP2Location;
private void request(string strIPAddress)
{
IPResult oIPResult = new IP2Location.IPResult();
try it
if (strIPAddress != “”)
IP2Location.Component.IPDatabasePath = “C:Program FilesIP2LocationDatabaseIP-COUNTRY.SAMPLE.BIN”;
oIPResult = IP2Location.Component.IPQuery(strIPAddress);
switch(oIPResult.Status.ToString())
“OK” status:
if (oIPResult.CountryShort == “JP”)
Response.Redirect(“index_jp.htm”)
else
Response.Redirect(“index_en.htm”)
pause;
Case “EMPTY_IP_ADDRESS”:
Response.Write(“IP address cannot be empty.”);
pause;
Case “INVALID_IP_ADDRESS”:
Response.Write(“Invalid IP address.”);
pause;
Case “MISSING_FILE”:
Response.Write(“Invalid database path.”);
pause;
else
Response.Write(“IP address cannot be empty.”);
catch (except exception)
Response.Write(ex.Message);
finally
oIPResult = null;
}
Compile this project and upload it to the website. All visitors will pass this check before being redirected to the respective web page.
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