CSharp Handling Object Creating Event – ADO.Net Database

File: ProductsByCategory.csusing System;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;public class ProductsByCategory
{
    private readonly string _conString;
    private readonly string _ProductCategory;    public SqlDataReader GetProducts()
    {
        SqlConnection con = new SqlConnection(_conString);        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "SELECT Title,Director,DateReleased FROM Products"
            + " JOIN ProductCategories ON Products.CategoryId=ProductCategories.Id"
            + " WHERE ProductCategories.Name=@CategoryName";        cmd.Parameters.AddWithValue("@CategoryName", _ProductCategory);        con.Open();
        return cmd.ExecuteReader(CommandBehavior.CloseConnection);
    }    public ProductsByCategory(string ProductCategory)
    {
        _ProductCategory = ProductCategory;
        _conString = WebConfigurationManager.ConnectionStrings["Products"]. ConnectionString;
    }
}
File: Web.config<configuration>
  <connectionStrings>
    <add name="Products"
         connectionString="Data Source=.\SQLEXPRESS;
         AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
  </connectionStrings>
</configuration>File: Default.aspx<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">    protected void srcProducts_ObjectCreating(object sender, ObjectDataSourceEventArgs e)
    {
        ProductsByCategory Products = new ProductsByCategory("Adventure");
        e.ObjectInstance = Products;
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Adventure Products</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:GridView
        id="grdProducts"
        DataSourceID="srcProducts"
        Runat="server" />    <asp:ObjectDataSource
        id="srcProducts"
        TypeName="ProductsByCategory"
        SelectMethod="GetProducts"
        OnObjectCreating="srcProducts_ObjectCreating"
        Runat="server" />    </div>
    </form>
</body>
</html>

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