Currency Convertor using WebServices

Currency Convertor using WebServices 

1)Go To Visual Studio 2010 -> New Project -> Select Asp.NET Web Service Application -> OK 
2)Design CurrencyConvertor.aspx 

We Need 1 Textbox -TxtAmount 
2 DropDownList - DdlFromCurrency , DdlToCurrency 
1 Button - Button1 
1 Label - LblResult 

Design Source of CurrencyConvertor.aspx 


3)Write Code in CurrencyConvertor.aspx.cs 

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Net; 
using System.IO; 
using System.Xml; 


namespace Exchange_Rate_Calculator_WebService 
{ 
public partial class Currency_Convertor : System.Web.UI.Page 
{ 
Service1 CurrenyConvertorService = new Service1(); 
protected void Page_Load(object sender, EventArgs e) 
{ 

} 
protected void Button1_Click(object sender, EventArgs e) 
{ 
double CurrencyAmount; 
//Check for a numeric value entered into the Amount textbox 
try 
{ 
CurrencyAmount = double.Parse(TxtAmount.Text); 
} 
catch 
{ 
LblResult.Text="Please enter a Numeric Value!"; 

return; 
} 

try 
{ 
string Result = null; 
string url; 

//Call the web service to get the exchange rate for the two currencies selected by the user 
url = "http://www.webservicex.net/CurrencyConvertor.asmx/ConversionRate?FromCurrency=" + DdlFromCurrency.SelectedValue + "&ToCurrency=" + DdlToCurrency.SelectedValue + ""; 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
StreamReader Stream = new StreamReader(response.GetResponseStream()); 
XmlDocument doc = new XmlDocument(); 
Result = Stream.ReadToEnd(); 
doc.LoadXml(Result); 

//Retrieve the conversion rate 
string NewConversionRate = doc.GetElementsByTagName("double").Item(0).InnerText; 
//Convert the conversion rate string to a double 
double ConversionRate = double.Parse(NewConversionRate); 

//Calculate the currency exchange 
double ConvertedAmount = CurrencyAmount * ConversionRate; 
//Display the results on the Default.aspx page 
LblResult.Text = TxtAmount.Text + " " + DdlFromCurrency.SelectedItem + " = " + dblConverted + " " + DdlToCurrency.SelectedItem; 
} 
catch 
{ 
LblResult.Text = "Oops..Web Service Not available. Try again later"; 
} 


} 


} 
} 



4) Enter the Currency Amount you want to convert and check the result.