add currency converter

Question

User-1327394822 posted

I am using the below code to change convert price to other currency.

1) how to get live currency?

2) does asp.net have any builtin support for this?

3) is the method I am using good?

@{
    
    var currency = "INR";
    var symbol = "Rs. ";
    double price = 65;
    
    if(!Request["currency"].IsEmpty()){
        Response.Cookies["currency"].Value = Request["currency"];
        Response.Cookies["currency"].Expires = DateTime.Now.AddDays(7);
    }
    if(Response.Cookies["currency"] != null){
        currency = Response.Cookies["currency"].Value;
    }
    if(!IsPost){
         switch(currency){
            case "INR":
            price = price;
            break;

            case "USD":
            price = price / 65;
            symbol = "$";
            break;

            case "GBP":
            price = price / 100;
            symbol = "&";
            break;

            case "DHS":
            price = price / 17.4;
            symbol = "DHS";
            break;

        }
    }
   
}
<div class="container">
    <form style="max-width: 300px; margin-top: 50px;" class="form-inline">
        <select name="currency" class="form-control resizedInput">
            <option value="INR" @(currency == "INR" ? "selected =\"selected\"" : " ")>INR</option>
            <option value="USD"@(currency == "USD" ? "selected =\"selected\"" : " ")>USD</option>
            <option value="GBP" @(currency == "GBP" ? "selected =\"selected\"" : " ")>GBP</option>
            <option value="DHS" @(currency == "DHS" ? "selected =\"selected\"" : " ")>DHS</option>
        </select>
        <input type="submit" class="btn btn-default changingbutton" value="go" />
    </form> 

<div>
    Price in @currency = @symbol @String.Format("{0:0.00}", price)
</div>
</div>

Answer 1

User325035487 posted

Free api here - yahoo

If you want as Json then go here

For example : USD-INR AND EUR-INR - here

use the package console manager to get the Newtonsoft JSON serielizer using this command

PM> Install-Package Newtonsoft.Json

Then

@using System;
@using System.Collections.Generic;
@using System.Linq;
@using Newtonsoft.Json.Linq;
@using System.Text;
@using System.Net;
@using System.Web;
@{
    StringBuilder theWebAddress = new StringBuilder();
    theWebAddress.Append("http://query.yahooapis.com/v1/public/yql?");
    theWebAddress.Append("q=" + System.Web.HttpUtility.UrlEncode("select * from yahoo.finance.xchange where pair in ('USDINR', 'EURINR')"));
    theWebAddress.Append("&format=json");
    theWebAddress.Append("&diagnostics=false");

    string results = "";

    using (WebClient wc = new WebClient())
    {
        results = wc.DownloadString(theWebAddress.ToString());
    }

    JObject dataObject = JObject.Parse(results);
    JArray jsonArray = (JArray)dataObject["query"]["results"]["rate"];

    foreach (var rate in jsonArray)
    {
        <h2>@rate["Name"]</h2>
        <p>Exchange Rate : @rate["Rate"] on @rate["Date"] at @rate["Time"]</p>
        Environment.NewLine;
    }
}

Hope you can go from there..

Answer 2

User-1327394822 posted

thank you. Can you please show me an example using the first one i.e xml api?

Answer 3

User325035487 posted

http://stackoverflow.com/questions/55828/how-does-one-parse-xml-files