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ConvCurr Example, source code file ConvCurr.aspx
<%@ Page Language="C#" %> <script runat="server"> public void btnConvert_Click(object sender, EventArgs e) { double sourceRate = double.Parse(ddlSourceCurrency.SelectedValue); double targetRate = double.Parse(ddlTargetCurrency.SelectedValue); double sourceAmount = 0.0, targetAmount = 0.0; if (double.TryParse(txtSourceAmt.Text, out sourceAmount)) { targetAmount = sourceAmount * targetRate / sourceRate; litTargetAmt.Text = targetAmount.ToString("#,##0.00"); } else { litTargetAmt.Text = "NAN"; } } </script> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>ConvCurr Example</title> <link rel="stylesheet" type="text/css" href="../examples.css" /> <style type="text/css"> .sp { width: 0.5in; } </style> </head> <body> <h2>ConvCurr Example</h2> <form id="form1" runat="server"> <table> <tr> <td>Source</td> <td class="sp"> </td> <td>Target</td> </tr> <tr> <td>Currency</td> <td> </td> <td>Currency</td> </tr> <tr> <td> <asp:DropDownList ID="ddlSourceCurrency" runat="server" CssClass="ctrl"> <asp:ListItem Value="1.000">Can. Dollar</asp:ListItem> <asp:ListItem Value="6.3330">Ruan</asp:ListItem> <asp:ListItem Value="0.99825">Euro</asp:ListItem> <asp:ListItem Value="49.225">Rupee</asp:ListItem> <asp:ListItem Value="12.9061">Peso</asp:ListItem> <asp:ListItem Value="1.00000">U.S. Dollar</asp:ListItem> </asp:DropDownList> </td> <td> </td> <td> <asp:DropDownList ID="ddlTargetCurrency" runat="server" CssClass="ctrl"> <asp:ListItem Value="1.000">Can. Dollar</asp:ListItem> <asp:ListItem Value="6.3330">Ruan</asp:ListItem> <asp:ListItem Value="0.99825">Euro</asp:ListItem> <asp:ListItem Value="49.225">Rupee</asp:ListItem> <asp:ListItem Value="12.9061">Peso</asp:ListItem> <asp:ListItem Value="1.00000">U.S. Dollar</asp:ListItem> </asp:DropDownList> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> </tr> <tr> <td>Source</td> <td class="sp"> </td> <td>Target</td> </tr> <tr> <td>Amount</td> <td> </td> <td>Amount</td> </tr> <tr> <td> <asp:TextBox ID="txtSourceAmt" runat="server" CssClass="ctrl" /> </td> <td> </td> <td> <asp:Literal ID="litTargetAmt" runat="server" /> </td> </tr> </table> <br /> <asp:Button ID="btnConvert" runat="server" Text="Convert Currency" onclick="btnConvert_Click" Width="224px" CssClass="ctrl" /> </form> </body> </html>