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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>
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