📄 综合例程(手工-xml读取、查询).txt
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<%@ Import Namespace=System.Data %>
<html>
<body>
<form runat="server">
Target Currency<br>
<asp:ListBox ID="Currencies" Width=256 RunAt="Server" /><br>
<br>
Amount in U.S. Dollars<br>
<asp:TextBox ID="USD" Width="256" RunAt="server" /><br>
<br>
<asp:Button Text="Convert" ID="ConvertButton" Width="256"
RunAt="server" /><br>
<br>
<asp:Label ID="Output" RunAt="server" />
</form>
</body>
</html>
<script language="C#" runat="server">
void Page_Init(Object sender,EventArgs e)
{
ConvertButton.Click+=new EventHandler(OnConvert);
}
void Page_Load(Object sender,EventArgs e)
{
if(!IsPostBack)
{
DataSet ds=new DataSet();
ds.ReadXml(Server.MapPath("Rates.xml"));
foreach(DataRow row in ds.Tables[0].Rows)
Currencies.Items.Add(row["Currency"].ToString());
Currencies.SelectedIndex=0;
}
}
void OnConvert(Object sender,EventArgs e)
{
try
{
decimal dollars=Convert.ToDecimal(USD.Text);
DataSet ds=new DataSet();
ds.ReadXml(Server.MapPath("Rates.xml"));
DataRow[]rows=ds.Tables[0].Select("Currency='"+
Currencies.SelectedItem.Text+"'");
decimal rate=Convert.ToDecimal(rows[0]["Exchange"]);
decimal amount=dollars*rate;
Output.Text=amount.ToString("f2");
}
catch(FormatException)
{
Output.Text="Error";
}
}
</script>⌨️ 快捷键说明
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