<%@ Page Language="C#" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Using the DataReader mode for executing a SQL Statement</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:SqlDataSource ID="categoriesSource"
runat="server"
ProviderName="System.Data.SqlClient"
DataSourceMode="DataReader"
ConnectionString="<%$ ConnectionStrings:AdventureWorks %>"
SelectCommand="Select ProductSubcategoryID, Name from Production.ProductSubcategory">
</asp:SqlDataSource>
Categories:
<asp:DropDownList runat="server"
DataSourceID="categoriesSource"
DataValueField="ProductSubcategoryID"
DataTextField="Name"
AutoPostBack="true"
ID="lstCategories" />
<asp:SqlDataSource ID="productsSource"
runat="server"
ProviderName="System.Data.SqlClient"
DataSourceMode="DataReader"
ConnectionString="<%$ ConnectionStrings:AdventureWorks %>"
SelectCommand="Select ProductID, Name, ProductNumber, StandardCost from Production.Product Where ProductSubcategoryID=@ProductSubcategoryID">
<SelectParameters>
<asp:ControlParameter
ControlID="lstCategories"
Name="ProductSubcategoryID"
PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView runat="server" DataSourceID="productsSource"
HeaderStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="True"
HeaderStyle-BackColor="blue" HeaderStyle-ForeColor="White" />
</div>
</form>
</body>
</html>
File: Web.config
<configuration>
<appSettings/>
<connectionStrings>
<add name="AdventureWorks"
connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=AdventureWorks;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<compilation debug="true" strict="false" explicit="true">
<codeSubDirectories>
<add directoryName="VB"></add>
<add directoryName="CS"></add>
</codeSubDirectories>
</compilation>
<pages>
<namespaces>
<clear/>
<add namespace="System"/>
<add namespace="System.Collections"/>
<add namespace="System.Collections.Specialized"/>
<add namespace="System.Configuration"/>
<add namespace="System.Text"/>
<add namespace="System.Text.RegularExpressions"/>
<add namespace="System.Web"/>
<add namespace="System.Web.Caching"/>
<add namespace="System.Web.SessionState"/>
<add namespace="System.Web.Security"/>
<add namespace="System.Web.Profile"/>
<add namespace="System.Web.UI"/>
<add namespace="System.Web.UI.WebControls"/>
<add namespace="System.Web.UI.WebControls.WebParts"/>
<add namespace="System.Web.UI.HtmlControls"/>
</namespaces>
</pages>
<authentication mode="Windows"></authentication>
<identity impersonate="true"/>
</system.web>
</configuration>
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