<%@ Page Language="C#" Trace="false" validateRequest="false" EnableSessionState="True" EnableViewState="true" SmartNavigation="false"%>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>
<%@ Import Namespace="net.webservicex.www" %>
<script Language="c#" runat="server">
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DataTable dt = this.GetCurrencies();
ddlFromCurrency.DataSource = dt;
ddlFromCurrency.DataBind();
ddlTooCurrency.DataSource = dt;
ddlTooCurrency.DataBind();
}
}
protected void ddlTooCurrency_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddlFromCurrency.SelectedValue.Length > 0)
{
double total = this.GetCurrency() * 100;
lblPrice.Text = total.ToString();
}
}
protected void ddlFromCurrency_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddlTooCurrency.SelectedValue.Length > 0)
{
double total = this.GetCurrency() * 100;
lblPrice.Text = total.ToString();
}
}
private double GetCurrency()
{
CurrencyConvertor cc = new CurrencyConvertor();
return cc.ConversionRate((Currency)Enum.Parse(typeof(Currency), ddlFromCurrency.SelectedValue), (Currency)Enum.Parse(typeof(Currency), ddlTooCurrency.SelectedValue));
}
protected DataTable GetCurrencies()
{
DataTable dtCur = new DataTable("currency");
dtCur.Columns.Add("cur");
foreach (string name in Enum.GetNames(typeof(Currency)))
{
DataRow r = dtCur.NewRow();
r["cur"] = Enum.Parse(typeof(Currency), name);
dtCur.Rows.Add(r);
r = null;
}
return dtCur;
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Real time curreny in ASP.NET</title>
<link rel="stylesheet" href="../example.css" type="text/css" />
</head>
<body>
<form runat="server">
<div id="content">
<b>Currency example using web service in ASP.NET</b>
<br /><br />
<table width="30%" border="1" cellpadding="2" cellspacing="0">
<tr>
<td>From currency</td>
<td><asp:DropDownList AutoPostBack="true" DataValueField="cur" DataTextField="cur" ID="ddlFromCurrency" runat="server" OnSelectedIndexChanged="ddlFromCurrency_SelectedIndexChanged" /></td>
</tr>
<tr>
<td>To Currency</td>
<td><asp:DropDownList AutoPostBack="true" DataValueField="cur" DataTextField="cur" ID="ddlTooCurrency" runat="server" OnSelectedIndexChanged="ddlTooCurrency_SelectedIndexChanged" /></td>
</tr>
<tr>
<td> </td>
<td><asp:Label ID="lblPrice" runat="server" /></td>
</tr>
</table>
</div>
</form>
</body>
</html>
Nu skulle det vara intressant att sätta ihop det hela med Asp.Net RegionInfo för att automatiskt läsa av vilken kurs som ska hämtas beroende på besökarens inställningar. Men det får bli i en senare artikel.
