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<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
Categories:<br />
<asp:SqlDataSource ID="sourceCategories"
runat="server"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT * FROM Categories">
</asp:SqlDataSource>
<asp:GridView ID="gridCategories"
runat="server"
DataSourceID="sourceCategories"
DataKeyNames="CategoryID">
<Columns>
<asp:CommandField ShowSelectButton="True" />
</Columns>
<RowStyle BackColor="White" ForeColor="#330099" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
</asp:GridView>
<br />
Products in this category:<br />
<asp:SqlDataSource ID="sourceProducts"
runat="server"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT ProductID, ProductName, UnitPrice FROM Products WHERE CategoryID=@CategoryID">
<SelectParameters>
<asp:ControlParameter Name="CategoryID" ControlID="gridCategories" PropertyName="SelectedDataKey.Value" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="gridProducts" runat="server" DataSourceID="sourceProducts" BackColor="White" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" CellPadding="4"
>
<RowStyle BackColor="White" ForeColor="#330099" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
</asp:GridView>
</div>
</form>
</body>
</html>
File: Web.config
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="Northwind" connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI"/>
</connectionStrings>
</configuration>
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