SqlDataSource with Parameters
<%@ 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>
<asp:SqlDataSource ID="sourceEmployees"
runat="server"
ProviderName="System.Data.SqlClient"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT EmployeeID, FirstName, LastName, Title, City FROM Employees WHERE City=@City">
<SelectParameters>
<asp:ControlParameter ControlID="lstCities"
Name="City"
PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="sourceEmployeeCities"
runat="server"
ProviderName="System.Data.SqlClient"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT DISTINCT City FROM Employees">
</asp:SqlDataSource>
<asp:DropDownList ID="lstCities"
runat="server"
DataSourceID="sourceEmployeeCities"
DataTextField="City"
Width="205px"
AutoPostBack="True">
</asp:DropDownList><br />
<asp:GridView ID="GridView1"
runat="server"
DataSourceID="sourceEmployees"
CellPadding="4"
Font-Names="Verdana"
Font-Size="Small"
ForeColor="Navy"
GridLines="None"
AutoGenerateColumns="False"
DataKeyNames="EmployeeID">
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#FFFBD6" ForeColor="Navy" />
<PagerStyle BackColor="#FFCC66" ForeColor="Navy" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" InsertVisible="False"
ReadOnly="True" SortExpression="EmployeeID" />
<asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
File: Web.config
<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<appSettings/>
<connectionStrings>
<add name="Northwind" connectionString="Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI"/>
</connectionStrings>
</configuration>
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