ADO Net Database ASP.Net Tutorial

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File: App_Code\DataLayer1.cs
using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.Collections.Generic;
public class DataLayer1
{
    private static readonly string _connectionString;
    public class ProductCategory
    {
        private int _id;
        private string _name;        public int Id
        {
            get { return _id; }
            set { _id = value; }
        }
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
    }
    public class Product
    {
        private string _title;
        private int _categoryId;
        public string Title
        {
            get { return _title; }
            set { _title = value; }
        }
        public int CategoryId
        {
            get { return _categoryId; }
            set { _categoryId = value; }
        }
    }
    public static void GetProductData(List productCategories, List products)
    {
        string commandText = "SELECT Id,Name FROM ProductCategories;SELECT Title, CategoryId FROM Products";
        SqlConnection con = new SqlConnection(_connectionString);
        SqlCommand cmd = new SqlCommand(commandText, con);
        using (con)
        {
            con.Open();
            SqlDataReader reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                DataLayer1.ProductCategory newCategory = new DataLayer1.ProductCategory();
                newCategory.Id = (int)reader["Id"];
                newCategory.Name = (string)reader["Name"];
                productCategories.Add(newCategory);
            }
            reader.NextResult();
            while (reader.Read())
            {
                DataLayer1.Product newProduct = new DataLayer1.Product();
                newProduct.Title = (string)reader["Title"];
                newProduct.CategoryId = (int)reader["CategoryID"];
                products.Add(newProduct);
            }
        }
    }
    static DataLayer1()
    {
        _connectionString = WebConfigurationManager.ConnectionStrings["Products"].ConnectionString;
    }
}
            
File: Web.config

  
             connectionString="Data Source=.\SQLEXPRESS;
         AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
  

File: ShowDataLayer1.aspx
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Collections.Generic" %>
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    void Page_Load()
    {
        List categories = new List();
        List products = new List();
        DataLayer1.GetProductData(categories, products);
        grdCategories.DataSource = categories;
        grdCategories.DataBind();
        grdProducts.DataSource = products;
        grdProducts.DataBind();
    }



    Show DataLayer1


    
    

    

Product Categories


            id="grdCategories"
        Runat="server" />
    

Products


            id="grdProducts"
        Runat="server" />