CSharp Using Parameters With Objectdatasource Control – ADO.Net Database

using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;public class Products
{
    private readonly string _conString;    public void UpdateProduct(int id, string title, string director, DateTime dateReleased)
    {
        SqlConnection con = new SqlConnection(_conString);
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "UPDATE Products SET Title=@Title,Director=@Director,DateReleased=        cmd.Parameters.AddWithValue("@Title", title);
        cmd.Parameters.AddWithValue("@Director", director);
        cmd.Parameters.AddWithValue("@DateReleased", dateReleased);
        cmd.Parameters.AddWithValue("@Id", id);        using (con)
        {
            con.Open();
            cmd.ExecuteNonQuery();
        }
    }    public SqlDataReader GetProducts()
    {
        SqlConnection con = new SqlConnection(_conString);        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "SELECT Id,Title,Director,DateReleased FROM Products";        con.Open();
        return cmd.ExecuteReader(CommandBehavior.CloseConnection);
    }    public Products()
    {
        _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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Products</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>    <asp:GridView
        id="grdProducts"
        DataSourceID="srcProducts"
        DataKeyNames="Id"
        AutoGenerateEditButton="true"
        Runat="server" />    <asp:ObjectDataSource
        id="srcProducts"
        TypeName="Products"
        SelectMethod="GetProducts"
        UpdateMethod="UpdateProduct"
        Runat="server"/>    </div>
    </form>
</body>
</html>

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