📄 calculatedcolumn.aspx

📁 asp.net技术内幕的书配源码

💻 ASPX

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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

<script runat=server>
void Page_Load(Object sender , EventArgs e) 
{
	DataSet dstProducts;
	SqlConnection conNorthwind;
	SqlDataAdapter dadProducts;
	DataColumn dcolSalePrice;

	//Grab the products table
	dstProducts = new DataSet();
	conNorthwind = new SqlConnection( @"Server=localhost;Integrated Security=SSPI;Database=Northwind" );
	dadProducts = new SqlDataAdapter( "Select * From Products", conNorthwind );
	dadProducts.Fill( dstProducts, "Products" );

	//Add the calculated column
	dcolSalePrice = new DataColumn( "SalePrice", typeof( Decimal ) );
	dcolSalePrice.Expression = "UnitPrice - (UnitPrice * .10)";
	dstProducts.Tables[ "Products" ].Columns.Add( dcolSalePrice );

	//Bind to the DataGrid
	dgrdProducts.DataSource = dstProducts;
	dgrdProducts.DataBind();
}
</Script>

<html>
<head><title>CalculatedColumn.aspx</title></head>
<body>

<asp:DataGrid
  ID="dgrdProducts"
  Runat="Server" />

</body>
</html>

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