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Allowing users to change currency on e-commerce web site

Posted on 2013-05-16
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Last Modified: 2013-08-22
I'm working on an e-commerce web site that currently displays all of the prices in USD.
I would like to add functionality that would allow the user to change the currency.

I was thinking about using a currency converter api to get the rates.
The base rate would be USD = 1

I would create a process that would consume the currency convert service/api and persist the rates every 12 hours.

On the top header of every page would be a menu to select a different currency.
Once the user selected a different currency, I would do a post back and look up the rate to calculate the prices.

I would then persist that selected rate to a cookie.

What are your thoughts? Any areas that can be improved on?
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Question by:JRockFL
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Manoj Patil earned 2000 total points
ID: 39210070
Use google api services to convert currency

And use one currency at back end and always show on front the currency change

like in calculations normally there is always one single currency

but on display you can just change currency by calling it from google api services

You just have to pass Currency from (etc PKR) , currency to (etc $)
Then it will give you the exact amount
So no need to worried about update your currency every day.
The code call the google api to convert currency

public static string ConvertCurrency (string To , string Amount , HttpRequest Request)
        {


        string Expression = Amount + “USD” + “=?” + To;
        string url = “http://www.google.com/ig/calculator?hl=en&q=” + Expression;


        string response = “”;
        string responseMsg = Request.Params.ToString();
        string post = responseMsg;
       
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        req.Method = “POST”;
        req.ContentType = “application/x-www-form-urlencoded”;
        req.ContentLength = post.Length;


        StreamWriter writer = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
        writer.Write(post);
        writer.Close();


        StreamReader reader = new StreamReader(req.GetResponse().GetResponseStream());
        response = reader.ReadToEnd();
        reader.Close();


        char[] cChar = new  char[3];
        string[] _params = new string[100];


        cChar[0] = ‘,’;
        _params = response.Split(cChar[0]);


        string ConvertedAmount = “”;


        ConvertedAmount = _params[1];
        ConvertedAmount = ConvertedAmount.Replace(“\”", “”);
        ConvertedAmount = ConvertedAmount.Replace(“rhs”, “”);
        ConvertedAmount = ConvertedAmount.Replace(“:”, “”);
        ConvertedAmount = ConvertedAmount.Trim();
        ConvertedAmount = ConvertedAmount.Remove(ConvertedAmount.IndexOf(‘ ‘), ConvertedAmount.Length – ConvertedAmount.IndexOf(‘ ‘));


        return ConvertedAmount;


        }

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