File: Product.cs : CompositeControl « Custom Controls « ASP.NET Tutorial

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace myControls
{
    public class Product : CompositeControl
    {
        private ITemplate _itemTemplate;
        private ProductItem _item;

        public string Name
        {
            get
            {
                EnsureChildControls();
                return _item.Name;
            }
            set
            {
                EnsureChildControls();
                _item.Name = value;
            }
        }

        public Decimal Price
        {
            get
            {
                EnsureChildControls();
                return _item.Price;
            }
            set
            {
                EnsureChildControls();
                _item.Price = value;
            }
        }

        [TemplateContainer(typeof(ProductItem))]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate ItemTemplate
        {
            get { return _itemTemplate; }
            set { _itemTemplate = value; }
        }

        protected override void CreateChildControls()
        {
            _item = new ProductItem();
            _itemTemplate.InstantiateIn(_item);
            Controls.Add(_item);
        }
    }

    public class ProductItem : WebControl, IDataItemContainer
    {
        private string _name;
        private decimal _price;

        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        public decimal Price
        {
            get { return _price; }
            set { _price = value; }
        }

        public object DataItem
        {
            get
            {
                return this;
            }
        }
        public int DataItemIndex
        {
            get { return 0; }
        }

        public int DisplayIndex
        {
            get { return 0; }
        }
    }


}
File: Default.aspx

<%@ Page Language="C#" %>
<%@ Register TagPrefix="custom" Namespace="myControls" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    void Page_Load()
    {
        Product1.Name = "Laptop Computer";
        Product1.Price = 1254.12m;
        Product1.DataBind();
    }

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Product</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <custom:Product
        id="Product1"
        Runat="Server">
        <ItemTemplate>
        Name: <%# Eval("Name") %>
        <br />
        Price: <%# Eval("Price", "{0:c}") %>
        </ItemTemplate>
    </custom:Product>

    </div>
    </form>
</body>
</html>

14.20.CompositeControl
	14.20.1.	Building Composite Controls
	14.20.2.	Building Hybrid Controls
	14.20.3.	Performing layout with an HTML table.
	14.20.4.	Item Rotator
	14.20.5.	Image Rotator
	14.20.6.	Creating a Default Template
	14.20.7.	File: Product.cs
	14.20.8.	Supporting Two-Way Databinding
	14.20.9.	Creating Templated Databound Controls