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File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="AuthorBrowser" %>
<!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:label id="Label1"
runat="server"
Width="120px"
Height="20px">Select Author:</asp:label>
<asp:dropdownlist id="lstAuthor"
runat="server"
Width="256px"
Height="22px"
AutoPostBack="True"
onselectedindexchanged="lstAuthor_SelectedIndexChanged">
</asp:dropdownlist>
<br />
<asp:label id="lblResults" runat="server" Width="384px" Height="168px">
</asp:label>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.Configuration;
using System.Data.SqlClient;
using System.Text;
public partial class AuthorBrowser : System.Web.UI.Page
{
private string connectionString = WebConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
FillAuthorList();
}
}
private void FillAuthorList()
{
lstAuthor.Items.Clear();
string selectSQL = "SELECT au_lname, au_fname, au_id FROM Authors";
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(selectSQL, con);
SqlDataReader reader;
try
{
con.Open();
reader = cmd.ExecuteReader();
while (reader.Read())
{
ListItem newItem = new ListItem();
newItem.Text = reader["au_lname"] + ", " + reader["au_fname"];
newItem.Value = reader["au_id"].ToString();
lstAuthor.Items.Add(newItem);
}
reader.Close();
}
catch (Exception err)
{
lblResults.Text = "Error reading list of names. ";
lblResults.Text += err.Message;
}
finally
{
con.Close();
}
}
protected void lstAuthor_SelectedIndexChanged(object sender, EventArgs e)
{
string selectSQL;
selectSQL = "SELECT * FROM Authors ";
selectSQL += "WHERE au_id='" + lstAuthor.SelectedItem.Value + "'";
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(selectSQL, con);
SqlDataReader reader;
try
{
con.Open();
reader = cmd.ExecuteReader();
reader.Read();
StringBuilder sb = new StringBuilder();
sb.Append("<b>");
sb.Append(reader["au_lname"]);
sb.Append(", ");
sb.Append(reader["au_fname"]);
sb.Append("</b><br />");
sb.Append("Phone: ");
sb.Append(reader["phone"]);
sb.Append("<br />");
sb.Append("Address: ");
sb.Append(reader["address"]);
sb.Append("<br />");
sb.Append("City: ");
sb.Append(reader["city"]);
sb.Append("<br />");
sb.Append("State: ");
sb.Append(reader["state"]);
sb.Append("<br />");
lblResults.Text = sb.ToString();
reader.Close();
}
catch (Exception err)
{
lblResults.Text = "Error getting author. ";
lblResults.Text += err.Message;
}
finally
{
con.Close();
}
}
}
File: Web.config
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="Pubs" connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Pubs;Integrated Security=SSPI"/>
</connectionStrings>
</configuration>
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